Affective forecasting (also known as hedonic forecasting, or the hedonic forecasting mechanism) is the prediction of one's affect (emotional state) in the future. As a process that influences preferences, decisions, and behavior, affective forecasting is studied by both psychologists and economists, with broad applications.
Kahneman and Snell began research on hedonic forecasts in the early 1990s, examining its impact on decision making. The term "affective forecasting" was later coined by psychologists Timothy Wilson and Daniel Gilbert. Early research tended to focus solely on measuring emotional forecasts, while subsequent studies began to examine the accuracy of forecasts, revealing that people are surprisingly poor judges of their future emotional states. For example, in predicting how events like winning the lottery might affect their happiness, people are likely to overestimate future positive feelings, ignoring the numerous other factors that might contribute to their emotional state outside of the single lottery event. Some of the cognitive biases related to systematic errors in affective forecasts are focalism, empathy gap, and impact bias.
While affective forecasting has traditionally drawn the most attention from economists and psychologists, their findings have in turn generated interest from a variety of other fields, including happiness research, law, and health care. Its effect on decision making and well-being is of particular concern to policy-makers and analysts in these fields, although it also has applications in ethics. For example, the tendency to underestimate our ability to adapt to life-changing events has led to legal theorists questioning the assumptions behind tort damage compensation. Behavioral economists have incorporated discrepancies between forecasts and actual emotional outcomes into their models of different types of utility and welfare. This discrepancy also concerns healthcare analysts, in that many important health decisions depend upon patients' perceptions of their future quality of life.
- 1 Overview
- 2 Major sources of errors
- 3 In economics
- 4 In law
- 5 In health
- 6 Improving forecasts
- 7 See also
- 8 References
- 9 Further reading
- 10 External links
Affective forecasting can be divided into four components: predictions about emotional valence (i.e. positive or negative), the specific emotions experienced, their duration, and their intensity. While errors may occur in all four components, research overwhelmingly indicates that the two areas most prone to bias, usually in the form of overestimation, are duration and intensity. Immune neglect is a form of impact bias in response to negative events, in which people fail to predict how much their psychological immune system will hasten their recovery. On average, people are fairly accurate about predicting which emotions they will feel in response to future events. However, some studies indicate that predicting specific emotions in response to more complex social events leads to greater inaccuracy. For example, one study found that while many women who imagine encountering gender harassment predict feelings of anger, in reality, a much higher proportion report feelings of fear. Other research suggests that accuracy in affective forecasting is greater for positive affect than negative affect, suggesting an overall tendency to overreact to perceived negative events. Gilbert and Wilson posit that this is a result of our psychological immune system.
While affective forecasts take place in the present moment, researchers also investigate its future outcomes. That is, they analyze forecasting as a two-step process, encompassing a current prediction as well as a future event. Breaking down the present and future stages allow researchers to measure accuracy, as well as tease out how errors occur. Gilbert and Wilson, for example, categorize errors based on which component they affect and when they enter the forecasting process. In the present phase of affective forecasting, forecasters bring to mind a mental representation of the future event and predict how they will respond emotionally to it. The future phase includes the initial emotional response to the onset of the event, as well as subsequent emotional outcomes, for example, the fading of the initial feeling.
When errors occur throughout the forecasting process, people are vulnerable to biases. These biases disable people from accurately predicting their future emotions. Errors may arise due to extrinsic factors, such as framing effects, or intrinsic ones, such as cognitive biases or expectation effects. Because accuracy is often measured as the discrepancy between a forecaster's present prediction and the eventual outcome, researchers also study how time affects affective forecasting. For example, the tendency for people to represent distant events differently from close events is captured in the construal level theory.
The finding that people are generally inaccurate affective forecasters has been most obviously incorporated into conceptualizations of happiness and its successful pursuit, as well as decision making across disciplines. Findings in affective forecasts have stimulated philosophical and ethical debates, for example, on how to define welfare. On an applied level, findings have informed various approaches to healthcare policy, tort law, consumer decision making, and measuring utility (see below sections on economics, law, and health).
Newer and conflicting evidence suggests that intensity bias in affective forecasting may not be as strong as previous research indicates. Five studies, including a meta-analysis recovers evidence that overestimation in affective forecasting is partly due to the methodology of past research. Their results indicate that some participants misinterpreted specific questions in affective forecasting testing. For example, one study found that undergraduate students tended to overestimate experienced happiness levels when participants were asked how they were feeling in general with and without reference to the election, compared to when participants were asked how they were feeling specifically in reference to the election. Findings indicated that 75%-81% of participants asked general questions misinterpreted them. After clarification of tasks, participants were able to more accurately predict the intensity of their emotions
Major sources of errors
Because forecasting errors commonly arise from literature on cognitive processes, many affective forecasting errors derive from and are often framed as cognitive biases, some of which are closely related or overlapping constructs (e.g. projection bias and empathy gap). Below is a list of commonly cited cognitive processes that contribute to forecasting errors.
One of the most common sources of error in affective forecasting across various populations and situations is the impact bias, the tendency to overestimate the emotional impact of a future event, whether in terms of intensity or duration. The tendencies to overestimate intensity and duration are both robust and reliable errors found in affective forecasting.
One study documenting the impact bias examined college students participating in a housing lottery. These students predicted how happy or unhappy they would be one year after being assigned to either a desirable or an undesirable dormitory. These college students predicted that the lottery outcomes would lead to meaningful differences in their own level of happiness, but follow-up questionnaires revealed that students assigned to desirable or undesirable dormitories reported nearly the same levels of happiness. Thus, differences in forecasts overestimated the impact of the housing assignment on future happiness.
Some studies specifically address "durability bias," the tendency to overestimate the length of time future emotional responses will last. Even if people accurately estimate the intensity of their future emotions, they may not be able to estimate the duration of them. Durability bias is generally stronger in reaction to negative events. This is important because people tend to work toward events they believe will cause lasting happiness, and according to durability bias, people might be working toward the wrong things.
The impact bias is a broad term and covers a multitude of more specific errors. Proposed causes of impact bias include mechanisms like immune neglect, focalism, and misconstruals.The pervasiveness of impact bias in affective forecasts is of particular concern to healthcare specialists, in that it affects both patients' expectations of future medical events as well as patient-provider relationships. (See health.)
Focalism (or the "focusing illusion") occurs when people focus too much on certain details of an event, ignoring other factors. Research suggests that people have a tendency to exaggerate aspects of life when focusing their attention on it. A well-known example originates from a paper by Kahneman and Schkade, who coined the term "focusing illusion" in 1998. They found that although people tended to believe that someone from the Midwest would be more satisfied if they lived in California, results showed equal levels of life satisfaction in residents of both regions. In this case, concentrating on the easily observed difference in weather bore more weight in predicting satisfaction than other factors. There are many other factors that could have contributed to the desire to move to the Midwest but the focal point for their decisions was weather. Various studies have attempted to "defocus" participants, meaning instead of focusing on that one factor they tried to make the participants think of other factors or to look at the situation in a different lens. There were mixed results dependent upon methods used. One successful study asked people to imagine how happy a winner of the lottery and a recently diagnosed HIV patient would be. The researchers were able to reduce the amount of focalism by exposing participants to detailed and mundane descriptions of each person's life, meaning that the more information the participants had on the lottery winner and the HIV patient the less they were able to only focus on few factors, these participants subsequently estimated similar levels of happiness for the HIV patient as well as the lottery-winner. As for the control participants, they made unrealistically disparate predictions of happiness. This could be due to the fact that the more information that is available the less likely it is one will able to ignore contributory factors.
Gilbert et al. originally coined the term "immune neglect" (or "immune bias") to describe a function of the psychological immune system. Immune neglect refers to forecasters' unawareness of their tendency to adapt to and cope with negative events. Unconsciously the body will identify a stressful event and try to cope with the event or try to avoid it. Bolger & Zuckerman found that coping strategies vary between individuals and are influenced by their personalities They assumed that since people generally do not take their coping strategies into account when they predict future events, that people with better coping strategies should have a bigger impact bias, or a greater difference between their predicted and actual outcome. For example, asking someone who is afraid of clowns how going to a circus would feel may result in an overestimation of fear because the anticipation of such fear causes the body to begin coping with the negative event. Hoerger et al. examined this further by studying college students’ emotions for football games. They found that students who generally coped with their emotions instead of avoiding them would have a greater impact bias when predicting how they’d feel if their team lost the game. They found that those with better coping strategies recovered more quickly. Since the participants did not think about their coping strategies when making predictions, those who actually coped had a greater impact bias. Those who avoided their emotions, felt very closely to what they predicted they would. In other words students who were able to deal with their emotions were able to recover from their feelings. The students were unaware that their body was actually coping with the stress and this process made them feel better than not dealing with the stress. Hoerger ran another study on immune neglect after this, which studied both daters' and non-daters' forecasts about Valentine’s Day, and how they would feel in the days that followed. Hoerger found that different coping strategies would cause people to have different emotions in the days following Valentine’s Day, but participants’ predicted emotions would all be similar. This shows that most people do not realize the impact that coping can have on their feelings following an emotional event. He also found that, not only did immune neglect create a bias for negative events, but also for positive ones. This shows that people continually make inaccurate forecasts because they do not take into account their ability to cope & overcome emotional events. Hoerger proposed that coping styles, and cognitive processes are associated with actual emotional reactions to life events.
A variant of immune neglect also proposed by Gilbert and Wilson is the region-beta paradox, where recovery from more intense suffering is faster than recovery from less intense experiences because of the engagement of coping systems. This complicates forecasting, leading to errors.
Projection bias is the tendency to falsely project current preferences onto a future event. When people are trying to estimate their emotional state in the future they attempt to give an unbiased estimate. However, people’s assessments are contaminated by their current emotional state and thus it may be difficult for them to predict their emotional state in the future an occurrence known as mental contamination. For example, if a college student was currently in a negative mood because he just found out he failed a test, and if the college student forecasted how much he would enjoy a party two weeks later, his current negative mood may influence his forecast. In order to make an accurate forecast the student would need to be aware that his forecast is biased due to mental contamination, be motivated to correct the bias, and be able to correct the bias in the right direction and magnitude.
Projection bias can arise from empathy gaps (or hot/cold empathy gaps), which occur when the present and future phases of affective forecasting are characterized by different states of physiological arousal, which the forecaster fails to take into account. For example, forecasters in a state of hunger are likely to overestimate how much they will want to eat later, overlooking the effect of their hungrr on future preferences. As with projection bias, economists use the visceral motivations that produce empathy gaps to help explain impulsive or self-destructive behaviors, such as smoking.
When predicting future emotional states people must first construct a good representation of the event. If people have a lot of experience with the event then they can easily picture the event. When people do not have much experience with the event they need to create a representation of what the event likely contains. For example, if people were asked how they would feel if they lost one hundred dollars in a bet, gamblers are more likely to easily construct an accurate representation of the event. "Construal level theory" theorizes that distant events are conceptualized more abstractly than immediate ones. Thus, psychologists suggest that a lack of concrete details prompts forecasters to rely on more general or idealized representations of events, which subsequently leads to simplistic and inaccurate predictions. For example, when asked to imagine what a 'good day' would be like for them in the near future, people often describe both positive and negative events. When asked to imagine what a 'good day' would be like for them in a year, however, people resort to more uniformly positive descriptions. Gilbert and Wilson call bringing to mind a flawed representation of a forecasted event the misconstrual problem. Framing effects, environmental context, and heuristics (such as schemas) can all affect how a forecaster conceptualizes a future event. For example, the way options are framed affects how they are represented: when asked to forecast future levels of happiness based on pictures of dorms they may be assigned to, college students use physical features of the actual buildings to predict their emotions. In this case, the framing of options highlighted visual aspects of future outcomes, which overshadowed more relevant factors to happiness, such as having a friendly roommate.
Time discounting (or time preference) is the tendency to weigh present events over future events. Immediate gratification is more preferable than delayed gratification, especially over longer periods of time and with younger children or adolescents. For example a child may prefer one piece of candy now instead of five pieces of candy in four months. The longer the duration of time, the more people tend to forget about the future effects. Drawing again from the candy example, even though five pieces of candy are more gratifying than one, the fact that it will take four months to receive such gratification may cause a child to overlook the fact that he/she will be much more satisfied in the future. It is expected that affective reactions to an event will be less intense in the future than in the present. This pattern is sometimes referred to as hyperbolic discounting or “present bias” because people’s judgements are bias toward present events.
Future anhedonia is an affective forecasting error which occurs when a person believes that they will experience less intense affects of an event that will occur in the future, than if the same event occurred in the present, meaning that if a bad thing happens right now it would be considered much worse than if it happens next year. Forecasts of the duration of feelings often capture the tendency for emotions to fade over time, but underestimate the speed in which this happens. For example, in a study participants were asked to predict their happiness after receiving $20. They rated how happy they would feel if they were to receive $20 tomorrow or if they were to receive it in a year. They found that participants predicted that they would be happier receiving $20 sooner, compared to receiving it in the future. Applied to affective forecasting, this helps explain why people underestimate the intensity of future events. They consider how they are feeling now much more than how they would feel in the future. Economists often cite time discounting as a source of mispredictions of future utility.
Previously formed expectations can alter emotional responses to the event itself, motivating forecasters to confirm or debunk their initial forecasts. In this way, the self-fulfilling prophecy can lead to the perception that forecasters have made accurate predictions. Inaccurate forecasts can also become amplified by expectation effects. For example, a forecaster who expects a movie to be enjoyable will, upon finding it dull, like it significantly less than a forecaster who had no expectations.
Affective forecasters often rely on memories of past events. When people report memories for past events they may leave out important details, change things that occurred, and even add things that have not happened. This suggests the mind constructs memories based on what actually happened, and other factors including the person’s knowledge, experiences, and existing schemas. Using highly available, but unrepresentative past memories, increases the impact bias. Various studies indicate that retroactive assessments of past experiences are prone to various errors, such as duration neglect or decay bias. People tend to overemphasize the peaks and ends of their experiences when assessing them (peak/end bias), instead of analyzing the event as a whole. For example, in recalling painful experiences, people place greater emphasis on the most discomforting moments as well as the end of the event, as opposed to taking into account the overall duration. Retroactive reports often conflict with present-moment reports of events, further pointing to contradictions between the actual emotions experienced during an event and the memory of them. In addition to producing errors in forecasts about the future, this discrepancy has incited economists to redefine different types of utility and happiness (see section on economics).
Another problem that can arise with affective forecasting is that people tend to misremember their past predictions. Meyvis, Ratner, and Levav predicted that people forget how they predicted an experience would be beforehand, and thought their predictions were the same as their actual emotions. Because of this, people do not realize that they made a mistake in their predictions, and will then continue to misforecast similar situations in the future. Meyvis et al. ran five studies to test whether or not this is true. They found in all of their studies, when people were asked to recall their previous predictions they instead write how they currently feel about the situation. This shows that they do not remember how they thought they would feel, and makes it impossible for them to learn from this event for future experiences.
Major life events can have a huge impact on people’s emotions for a very long time but the intensity of that emotion tends to decrease with time, a phenomenon known as emotional evanescence. When making forecasts, forecasters often overlook this phenomenon. Psychologists have suggested that emotion does not decay over time predictably like radioactive isotopes but that the mediating factors are more complex. People have psychological processes that help dampen the emotion. Psychologists have proposed that surprising, unexpected, or unlikely events cause more intense emotional reaction. Research suggests that people are unhappy with randomness and chaos and that they automatically think of ways to make sense of an event when it is surprising or unexpected. This is related to immune neglect in that when these unwanted acts of randomness occur people become upset and try to find meaning or to cope with the event. The way that people try to make sense of the situation can be considered a coping strategy made by the body. This idea differs from immune neglect due to the fact that this is more of momentary idea. Immune neglect tries to cope with the event before it even happens.
One study documents how sense-making processes decrease emotional reaction. The study found that a small gift produced greater emotional reactions when it was not accompanied by a reason than when it was, arguably because the reason facilitated the sense-making process, dulling the emotional impact of the gift. Researchers have summarized that pleasant feelings are prolonged after a positive situation if people are uncertain about the situation.
People fail to anticipate that they will make sense of events in a way that will diminish the intensity of the emotional reaction. This error is known as ordinization neglect. For example, ("I will be ecstatic for many years if my boss agrees to give me a raise") an employee might believe, especially if the employee believes the probability of a raise was unlikely. Immediately after having the request approved, the employee may be thrilled but with time the employees make sense of the situation (e.g, "I am a very hard worker and my boss must have noticed this") thus dampening the emotional reaction.
Positive vs negative affect
Research suggests that accuracy in affective forecasting is greater for positive affect than negative affect. Another related bias is fading affect bias, in which the emotions associated with unpleasant memories fade more quickly than the emotion associated with positive events.
Research in affective forecasting errors complicate conventional interpretations of utility maximization, which presuppose that to make rational decisions, people must be able to make accurate forecasts about future experiences or utility. Whereas economics formerly focused largely on utility in terms of a person's preferences (decision utility), the realization that forecasts are often inaccurate suggests that measuring preferences at a time of choice may be an incomplete concept of utility. Thus, economists such as Daniel Kahneman, have incorporated differences between affective forecasts and later outcomes into corresponding types of utility. Whereas a current forecast reflects expected or predicted utility, the actual outcome of the event reflects experienced utility. Predicted utility is the "weighted average of all possible outcomes under certain circumstances." Experienced utility refers to the perceptions of pleasure and pain associated with an outcome. Khaneman and Thaler provide an example of "the hungry shopper," in which case the shopper takes pleasure in the purchase of food due to their current state of hunger. The usefulness of such purchasing is based upon their current experience and their anticipated pleasure in fulfilling their hunger.
Affective forecasting is an important component of studying human decision making. Research in affective forecasts and economic decision making include investigations of durability bias in consumers  and predictions of public transit satisfaction. In relevance to the durability bias in consumers, a study was conducted by Wood and Bettman, that showed that people make decisions regarding the consumption of goods based on the predicted pleasure, and the duration of that pleasure, that the goods will bring them. Overestimation of such pleasure, and its duration, increases the likelihood that the good will be consumed. Knowledge on such an effect can aid in the formation of marketing strategies of consumer goods. Studies regarding the predictions of public transit satisfaction reveal the same bias. However with a negative impact on consumption, due to their lack of experience with public transportation, car users predict that they will receive less satisfaction with the use of public transportation than they actually experience. This can lead them to refrain from the use of such services, due to inaccurate forecasting. Broadly, the tendencies people have to make biased forecasts deviate from rational models of decision making. Rational models of decision making presume an absence of bias, in favor of making comparisons based on all relevant and available information. Affective forecasting may cause consumers to rely on the feelings associated with consumption rather than the utility of the good itself. One application of affective forecasting research is in economic policy. Knowledge that forecasts, and therefore, decisions, are affected by biases as well as other factors (such as framing effects), can be used to design policies that maximize the utility of people's choices. This approach is not without its critics, however, as it can also be seen to justify economic paternalism.
Prospect theory describes how people make decisions. It differs from expected utility theory in that it takes into account the relativity of how people view utility and incorporates loss aversion, or the tendency to react more strongly to losses rather than gains. Some researchers suggest that loss aversion is in itself an affective forecasting error, since people often overestimate the impact of future losses.
Happiness and well-being
Economic definitions of happiness are tied to concepts of welfare and utility, and researchers are often interested in how to increase levels of happiness in the population. The economy has a major influence on the aid that is provided through welfare programs because it provides funding for such programs. Many welfare programs are focused on providing assistance with the attainment of basic necessities such as food and shelter. This is may be due to the fact that happiness and well-being is best derived from personal perceptions of one's ability to provide these necessities. This statement is supported by research that states after basic needs have been met, income has less of an impact on perceptions of happiness. Additionally, the availability of such welfare programs can enable those that are less fortunate to have additional discretionary income. Discretionary income can be dedicated to enjoyable experiences, such as family outings, and in turn, provides an additional dimension to their feelings and experience of happiness. Affective forecasting provides a unique challenge to answering the question regarding the best method for increasing levels of happiness, and economists are split between offering more choices to maximize happiness, versus offering experiences that contain more objective or experienced utility. Experienced utility refers to how useful an experience is in its contribution to feelings of happiness and well-being. Experienced utility can refer to both material purchases and experiential purchases. Studies show that experiential purchases, such as a bag of chips, result in forecasts of higher levels of happiness than material purchases, such as the purchase of a pen. This prediction of happiness as a result of a purchase experience exemplifies affective forecasting. It is possible that an increase in choices, or means, of achieving desired levels of happiness will be predictive of increased levels of happiness. For example, if one is happy with their ability to provide themselves with both a choice of necessities and a choice of enjoyable experiences they are more likely to predict that they will be more happy than if they were forced to choose between one or the other. Also, when people are able to reference multiple experiences that contribute to their feelings of happiness, more opportunities for comparison will lead to a forecast of more happiness. Under these circumstances, both the quantity of choices and the quantity of experienced utility have the same effect on affective forecasting, which makes it difficult to chose a side of the debate on which method is most effective in maximizing happiness.
Applying findings from affective forecasting research to happiness also raises methodological issues: should happiness measure the outcome of an experience, or the satisfaction experienced as result of the choice made based upon a forecast? For example, although professors may forecast that getting tenure would significantly increase their happiness, research suggests that in reality, happiness levels between professors who are or are not awarded tenure are insignificant. In this case happiness is measured in terms of the outcome of an experience. Affective forecasting conflicts such as this one have also influenced theories of hedonic adaptation, which compares happiness to a treadmill, in that it remains relatively stable despite our forecasts.
Similar to how some economists have drawn attention to how affective forecasting violates assumptions of rationality, legal theorists point out that inaccuracies in, and applications of, these forecasts have implications in law that have remained overlooked.The application of affective forecasting, and its related research, to legal theory reflects a wider effort to address how emotions affect the legal system. In addition to influencing legal discourse on emotions, and welfare, Jeremy Blumenthal cites additional implications of affective forecasting in tort damages, capital sentencing and sexual harassment.
Jury awards for tort damages are based on compensating victims for pain, suffering, and loss of quality of life. However, findings in affective forecasting errors have prompted some to suggest that juries are overcompensating victims, since their forecasts overestimate the negative impact of damages on the victims' lives. Some scholars suggest implementing jury education to attenuate potentially inaccurate predictions, drawing upon research that investigates how to decrease inaccurate affective forecasts.
During the process of capital sentencing, juries are allowed to hear victim impact statements (VIS) from the victim's family. This demonstrates affective forecasting in that its purpose is to present how the victim's family has been impacted emotionally and, or, how they expect to be impacted in the future. These statements can cause jury's to overestimate the emotional harm causing harsh sentencing, or to underestimate harm resulting in inadequate sentencing. The time frame in which these statements are present also influences affective forecasting. By increasing the time gap between the crime itself and sentencing, the time at which victim impact statements are given, forecasts are more likely to be influenced by the error of immune neglect (See Immune neglect) Immune neglect is likely to lead to underestimation of future emotional harm, and therefore results in inadequate sentencing. As with tort damages, jury education is a proposed method for alleviating the negative effects of forecasting error.
In cases involving sexual harassment judgements are more likely to blame the victim for their failure to react in a timely fashion or their failure to make use of services that were available to them in the event of sexual harassment. This is because prior to the actual experience of harassment, people tend to overestimate their affective reactions as well as their proactive reactions in response to sexual harassment. This exemplifies the focalism error (See Focalism) in which forecasters ignore alternative factors that may influence ones' reaction, or failure to react. For example, in their study Woodzicka and LaFrance studied women's predictions of how they would react to sexual harassment during an interview. Forecasters overestimated their affective reactions of anger, while underestimating the level of fear they would experience. They also overestimated their proactive reactions. In Study 1, participants reported that they would refuse to answer questions of a sexual nature and, or, report the question to the interviewer's supervisor. However, in Study 2, of those who had actually experienced sexual harassment during an interview, none of them displayed either proactive reaction. If juries are able to recognize such errors in forecasting, they may be able to adjust such errors. Additionally, if juries are educated on other factors that may influence the reactions of those who are victims of sexual harassment, such as intimidation, they are more likely to make more accurate forecasts, and less likely to blame victims for their own victimization.
Affective forecasting has implications in health decision making and medical ethics and policy. Research in health-related affective forecasting suggests that nonpatients consistently underestimate the quality of life associated with chronic health conditions and disability. The so-called "disability paradox" states the discrepancy between self-reported levels of happiness amongst chronically ill people versus the predictions of their happiness levels by healthy people. The implications of this forecasting error in medical decision making can be severe, because judgments about future quality of life often inform health decisions. Inaccurate forecasts can lead patients, or more commonly their health care agent, to refuse life-saving treatment in cases when the treatment would involve a drastic change in lifestyle, for example, the amputation of a leg. A patient, or health care agent, who falls victim to focalism would fail to take into account all the aspects of life that would remain the same after losing a limb. Although Halpern and Arnold suggest interventions to foster awareness of forecasting errors and improve medical decision making amongst patients, the lack of direct research in the impact of biases in medical decisions provides a significant challenge.
Research also indicates that affective forecasts about future quality of life are influenced by the forecaster's current state of health. Whereas healthy individuals associate future low health with low quality of life, less healthy individuals do not forecast necessarily low quality of life when imagining having poorer health. Thus, patient forecasts and preferences about their own quality of life may conflict with public notions. Because a primary goal of healthcare is maximizing quality of life, knowledge about patients' forecasts can potentially inform policy on how resources are allocated.
Some doctors suggest that research findings in affective forecasting errors merit medical paternalism. Others argue that although biases exist and should support changes in doctor-patient communication, they do not unilaterally diminish decision-making capacity and should not be used to endorse paternalistic policies. This debate captures the tension between medicine's emphasis on protecting the autonomy of the patient and an approach that favors intervention in order to correct biases.
Individuals who recently have experienced an emotionally-charged life event will display the impact bias. The individual predicts they will feel happier than they actually feel about the event. Another factor that influences overestimation is focalism which causes individuals to concentrate on the current event. Individuals often fail to realize that other events will also influence how they currently feel. Lam et al. (2005) found that the perspective that individuals take influences their susceptibility to biases when making predictions about their feelings. A perspective that overrides impact bias is mindfulness. Mindfulness is a skill that individuals can learn to help them prevent overestimating their feelings. Being mindful helps the individual understand that they may currently feel negative emotions, but the feelings are not permanent. The Five Factor Mindfulness Questionnaire (FFMQ) can be used to measure an individual's mindfulness. The five factors of mindfulness are observing, describing, acting with awareness, non-judging of inner experience, and non-reactivity to inner experience. The two most important factors for improving forecasts are observing and acting with awareness. The observing factor assesses how often an individual attends to their sensations, emotions, and outside environment. The ability to observe allows the individual to avoid focusing on one single event, and be aware that other experiences will influence their current emotions. Acting with awareness requires assessing how individuals tend to current activities with careful consideration and concentration. Emanuel, Updegraff, Kalmbach, and Ciesla (2010) stated that the ability to act with awareness reduces the impact bias because the individual is more aware that other events co-occur with the present event. Being able to observe the current event can help individuals focus on pursuing future events that provide long-term satisfaction and fulfillment.
- George Loewenstein
- Happiness economics
- Hedonic treadmill
- List of cognitive biases
- List of memory biases
- Prospect theory
- Welfare economics
- Wilson, Timothy D.; Daniel T. Gilbert (2003). "Affective Forecasting". Advances in Experimental Social Psychology 35: 345–411. doi:10.1016/S0065-2601(03)01006-2.
- Gilbert, D.T.; E.C. Pinel; T.D. Wilson; S.J. Blumberg; T.P. Wheatley (1998). "Immune neglect: A source of durability bias in affective forecasting". Journal of Personality and Social Psychology 75 (3): 617–638. doi:10.1037/0022-35184.108.40.2067. PMID 9781405.
- Kahneman, Daniel; Richard H. thaler (Winter 2006). "Utility Maximization and Experienced Utility". Journal of Economic Perspectives 20 (1): 221–234. doi:10.1257/089533006776526076. Retrieved 3 March 2012.
- Woodzicka, Julie A.; Marianne LaFrance (Spring 2001). "Real Versus Imagined Gender Harassment". Journal of Social Issues 57 (1): 15–30. doi:10.1111/0022-4537.00199.
- Finkenauer, Catrin; Marcello Gallucci; Wilco W. van Dijk; Monique Pollmann (August 2007). "Investigating the Role of Time in Affective Forecasting: Temporal Influences on Forecasting Accuracy". Personality and Social Psychology Bulletin 33 (8): –. doi:10.1177/0146167207303021.
- Ayton, Peter; Alice Pott; Najat Elwakili (February 2007). "Affective forecasting: Why can't people predict their emotions?". Thinking & Reasoning 13 (1): 62–80. doi:10.1080/13546780600872726.
- Eastwick, Paul W.; Eli J. Finkel; Tamar Krishnamurti; George Loewenstein (May 2008). "Mispredicting distress following romantic breakup: Revealing the time course of the affective forecasting error". Journal of Experimental Social Psychology 44 (3): 800–807. doi:10.1016/j.jesp.2007.07.001.
- Liberman, Nira; Michael D. Sagristano; Yaacov Trope (2002). "The effect of temporal distance on level on mental construal". Journal of Experimental Social Psychology 38 (6): 523–534. doi:10.1016/S0022-1031(02)00535-8.
- Hsee, Christopher K; Reid Hastie; Jingqiu Chen (May 2008). "Hedonomics: Bridging decision research with happiness research". Perspectives on Psychological Science 3 (3): 224–243. doi:10.1111/j.1745-6924.2008.00076.x.
- Tella, R. D.; R. MacCulloch (2006). "Some uses of happiness data in economics". The Journal of Economic Perspectives 20 (1): 25–46. doi:10.1257/089533006776526111.
- Halpern, Jodi; Robert M. Arnold (October 2008). "Affective Forecasting: An Unrecognized Challenge in Making Serious Health Decisions". Journal of General Internal Medicine 23 (10): 1708–1712. doi:10.1007/s11606-008-0719-5. PMC 2533375. PMID 18665428.
- Kahneman, Daniel; Amos Tversky (27 September 1974). "Judgment under Uncertainty: Heuristics and Biases". Science 185 (4157): 1124–1131. doi:10.1126/science.185.4157.1124. PMID 17835457.
- Hausman, Daniel M. (2010). "Hedonism and Welfare Economics". Economics and Philosophy 26 (3): 321–344. doi:10.1017/S0266267110000398.
- Swedloff, Rick; Peter H. Huang (Spring 2010). "Tort Damages and the New Science of Happiness". Indiana Law Journal 85 (2): 553–597.
- Wood, Stacy L.; James R. Bettman (2007). "Predicting Happiness: How Normative Feeling Rules Influence (and Even Reverse) Durability Bias". Journal of Consumer Psychology 17 (3): 188–201. doi:10.1016/S1057-7408(07)70028-1.
- Levine, Linda J.; Lench, Heather C.; Kaplan, Robin L.; Safer, Martin A. (1 January 2012). "Accuracy and artifact: Reexamining the intensity bias in affective forecasting.". Journal of Personality and Social Psychology 103 (4): 584–605. doi:10.1037/a0029544.
- Buehler, Roger; Cathy McFarland (November 2001). "Intensity Bias in Affective Forecasting: The Role of Temporal Focus". Personality and Social Psychology Bulletin 27 (11): 1480–1493. doi:10.1177/01461672012711009.
- Hoerger, Michael; Stuart W. Quirk; Richard E. Lucas; Thomas H. Carr (August 2010). "Cognitive determinants of affective forecasting errors". Judgment and Decision Making 5 (5): 365–373. PMC 3170528. PMID 21912580.
- Gilbert, Daniel T.; Pinel, Elizabeth C.; Wilson, Timothy D.; Blumberg, Stephen J.; Wheatley, Thalia P. (1 January 1998). "Immune neglect: A source of durability bias in affective forecasting.". Journal of Personality and Social Psychology 75 (3): 617–638. doi:10.1037/0022-35220.127.116.117. PMID 9781405.
- Wilson, Timothy D.; Daniel T. Gilber (June 2005). "Affective Forecasting: Knowing What to Want". Current Directions in Psychological Science 14 (3): 131–134. doi:10.1111/j.0963-7214.2005.00355.x.
- Wilson, Timothy D.; Wheatley, Thalia; Meyers, Jonathan M.; Gilbert, Daniel T.; Axsom, Danny (1 January 2000). "Focalism: A source of durability bias in affective forecasting.". Journal of Personality and Social Psychology 78 (5): 821–836. doi:10.1037/0022-3518.104.22.1681. PMID 10821192.
- Wilson, Timothy D.; Thalia Wheatley; Jonathan M. Meyers; Daniel T. Gilbert; Danny Axsom (May 2000). "Focalism: A source of durability bias in affective forecasting". Journal of Personality and Social Psychology 78 (5): 821–836. doi:10.1037/0022-3522.214.171.1241. PMID 10821192.
- Laurie E. Wasko; Cynthia L. S. Pury (2009). Shane J. Lopez, ed. The Encyclopedia of Positive Psychology. West Sussex: Blackwell Publishing. p. 24.
- Schkade, David A.; Daniel Kahneman (1998). "Does Living in California Make People Happy? A Focusing Illusion in Judgments of Life Satisfaction". Psychological Science 9 (5): 340–346. doi:10.1111/1467-9280.00066.
- Hoerger, Michael; Stuart W. Quirk; Richard E. Lucas; Thomas H. Carr (February 2009). "Immune neglect in affective forecasting". Journal of Research in Personality 43 (1): 91–94. doi:10.1016/j.jrp.2008.10.001.
- Bolger, N.; Zuckerman A. (1995). "A Framework for Studying Personality in the Stress Process". Journal of Personality and Social Psychology 69: 890–902. doi:10.1037/0022-35126.96.36.1990.
- Hoerger, M.; Quirk S.W.; Lucas R.E.; Carr T.H. (2009). "Immune Neglect in Affective Forecasting". Journal of Research in Personality 43: 91–94. doi:10.1016/j.jrp.2008.10.001.
- Hoerger, M. (2012). "Coping strategies and Immune Neglect in Affective Forecasting: Direct Evidence and Key Moderators". Judgement and Decision Making 7 (1): 86–96.
- Hoerger, Michael (January 1, 2012). "Coping strategies and immune neglect in affective forecasting: Direct evidence and key moderators". Judgement and Decision Making.
- Daniel T. Gilbert, Matthew D. Lieberman, Carey K. Morewedge and Timothy D. Wilson. The Peculiar Longevity of Things Not So Bad. Psychological Science January 2004 vol. 15 no. 1 14-19
- Lowenstein, George; Ted O'donoghue; Matthew Rabin (November 2003). "Projection Bias in Predicting Future Utility". The Quarterly Journal of Economics 118 (4): 1209–1248. doi:10.1162/003355303322552784.
- Gilovich, Thomas; Griffin, Dale; Kahneman, Daniel (2002). Heuristics and Biases. Cambridge University Press. pp. 167–184.
- Loewenstein, G; D. Prelec; C. Shatto. "Hot/cold intrapersonal empathy gaps and the under-prediction of curiosity". Unpublished manuscript, Carnegie Mellon University, Pittsburgh, PA.
- Sayette, Michael A.; George Loewenstein; Kasey M. Griffin; Jessica J. Black (Sep 2008). "Exploring the cold-to-hot empathy gap in smokers". Psychological Science 19 (9): 926–932. doi:10.1111/j.1467-9280.2008.02178.x. PMC 2630055. PMID 18947359.
- Wesp, Richard; Joshua Sandry; Anthony Prisco; Pamela Sarte (2009). "Affective forecasts of future positive events are tempered by consideration of details". American Journal of Psychology 122 (2): 167–174. PMID 19507424.
- Read, Daniel; Read, N.L. "Time discounting over the lifespan". Organizational Behavior and Human Decision Processes 94 (1): 22–32. doi:10.1016/j.obhdp.2004.01.002.
- Kassam, Karim S.; Gilbert, Daniel T.; Boston, Andrew; Wilson, Timothy D. (1 November 2008). "Future anhedonia and time discounting". Journal of Experimental Social Psychology 44 (6): 1533–1537. doi:10.1016/j.jesp.2008.07.008.
- Zauberman, Gal; Kim, B. Kyu; Malkoc, Selin A; Bettman, James R (1 August 2009). "Discounting Time and Time Discounting: Subjective Time Perception and Intertemporal Preferences". Journal of Marketing Research 46 (4): 543–556. doi:10.1509/jmkr.46.4.543.
- Kassam, Karim S.; Daniel T. Gilbert; Andrew Boston; Timothy D. Wilson (November 2008). "Future anhedonia and time discounting". Journal of Experimental Social Psychology 44 (6): 1533–1537. doi:10.1016/j.jesp.2008.07.008.
- Frederick, Shane; George Loewenstein,; Ted O'Donoghue (June 2002). "Time Discounting and Time Preference: A Critical Review". Journal of Economic Literature XL: 351–401. doi:10.1257/jel.40.2.351.
- Wilson, Timothy D.; Douglas J. Lisle; Dolores Kraft; Christopher G. Wetzel (April 1989). "Preferences as expectation-driven inferences: Effects of affective expectations on affective experience". Journal of Personality and Social Psychology 56 (4): 519–530. doi:10.1037/0022-35188.8.131.529. PMID 2709307.
- Geers, Andrew L.; G. Daniel Lassiter (July 1999). "Affective Expectations and Information Gain: Evidence for Assimilation and Contrast Effects in Affective Experience". Journal of Experimental Social Psychology 35 (4): 394–413. doi:10.1006/jesp.1999.1377.
- Goldstein, Bruce. Cognitive Psychology: Connecting Mind, Research and Everyday Experience (Third ed.). p. 213. ISBN 978-0495914976. Check date values in:
- Morewedge,, Carey K; Daniel T. Gilbert; Timothy D. Wilson (August 2005). "The Least Likely of Times: How Remembering the Past Biases Forecasts of the Future". Psychological Science 16 (8): 626–630. doi:10.1111/j.1467-9280.2005.01585.x. PMID 16102065.
- Meyvis, T.; Ratner R.K.; Levav J.M. (2010). "Why Don't We Learn to Accurately Forecast Feelings? How Misremembering Our Predictions Blinds Us to Forecasting Errors". Journal of Experimental Psychology: General 139 (4): 579–589. doi:10.1037/a0020285.
- T. D. Wilson; D.T. Gilbert; D.B. Centerbar (2002). J. Carillo & I. Brocas, ed. Economics and psychology. Oxford: Oxford UP. pp. 209–233.
- "The uncertainty intensification hypothesis". http://www.psych-it.com.au/. Retrieved 2014-11-22.
- Walker, W. Richard; John J. Skowronski; Charles P. Thompson (2003). "Life Is Pleasant—and Memory Helps to Keep It That Way!". Review of General Psychology (Educational Publishing Foundation) 7 (2): 203–210. doi:10.1037/1089-26184.108.40.206. Retrieved 2009-08-27.
- DellaVigna, Stefano (2009). "Psychology and Economics: Evidence from the Field". Journal of Economic Literature 47 (2): 315–372. doi:10.1257/jel.47.2.315.
- Welsch, Heinz (15 September 2009). "Implications of happiness research for environmental economics". Ecological Economics 68 (11): 2735–2742. doi:10.1016/j.ecolecon.2009.06.003.
- "Expected Utility".
- Pedersen, Tore (2009). Affective Forecasting: Predicting Future Satisfaction with Public Transport. Karlstad: Karlstad University. ISBN 978-91-7063-273-0.
- Kahneman, Daniel; Amos Tversky (Mar 1979). "Prospect Theory: An analysis of decision under risk". Econometrica 47 (2): 263–292. doi:10.2307/1914185.
- Kermer, Deborah A.; Erin Driver-Linn; Timothy D. Wilson; Daniel T. Gilbert (2006). "Loss Aversion Is an Affective Forecasting Error". Psychological Science 17 (8): 649–653. doi:10.1111/j.1467-9280.2006.01760.x. PMID 16913944.
- United States. Congress. House. Committee on Ways and Means. Subcommittee on Human Resources. (2011). GAO report on duplication of government programs; focus on welfare and related programs: Hearing before the Subcommittee on Human Resources of the Committee on Ways and Means, U.S. House of Representatives, One Hundred Twelfth Congress, first session, April 5, 2011. Washington: U.S. G.P.O..
- Buying Happiness:
Differential Consumption Experiences for Material and Experiential Purchases Ryan T. Howell & Darwin A. Guevarra
Department of Psychology, San Francisco State University
- Gertner, Jon (September 7, 2003). "The Futile Pursuit of Happiness". New York Times. Retrieved 2009-08-29.
Gilbert says. "We've used the metaphor of the 'psychological immune system' -- it's just a metaphor, but not a bad one for that system of defenses that helps you feel better when bad things happen."[dead link]
- Maroney, Terry A. (April 2006). "Law and Emotion: A Proposed Taxonomy of an Emerging Field". Law and Human Behavior 30 (2): 119–142. doi:10.1007/s10979-006-9029-9. PMID 16786403.
- Blumenthal, Jeremy A. (2005). "Law and the Emotions: The Problems of Affective Forecasting". Indiana Law Journal 80: 155–238. doi:10.2139/ssrn.497842. Retrieved 3 March 2012.
- Blumenthal, Jeremy (2009). "Affective forecasting and capital sentencing: reducing the effect of victim impact statements". American Criminal Law Review 46 (1): 107+.
- Maroney, Terry A. (April 2006). "Law and Emotion: A Proposed Taxonomy of an Emerging Field". Law and Human Behavior 30 (2): 119–142. doi:10.1007/s10979-006-9029-9. PMID 16786403.
- Winter, Laraine; Miriam S. Moss; Christine Hoffman (April 2009). "Affective Forecasting and Advance Care PlanningAffective Forecasting and Advance Care Planning". Journal of Health Psychology 14 (3): 447–456. doi:10.1177/1359105309102201. PMID 19293306. Retrieved 3 March 2012.
- Loewenstein, George (2005). "Projection bias in medical decision making". Med Decis Making 25 (1): 96–105. doi:10.1177/0272989X04273799. PMID 15673587.
- Rhodes, Rosamond; James J. Strain (2008). "Affective Forecasting and Its Implications for Medical Ethics". Cambridge Quarterly of Healthcare Ethics 17 (1): 54–65. doi:10.1017/S0963180108080067. PMID 18462545.
- Gligorov, Nada (2009). "Reconsidering the Impact of Affective Forecasting". Cambridge Quarterly of Healthcare Ethics 18 (2): 166–173. doi:10.1017/S0963180109090276. PMID 19263600.
- Loewenstein, G; PA Ubel; N Schwarz; D Smith (July 2004). "Misimagining the unimaginable: the disability paradox and health care decision making". Health Psychology 24 (4): 57–62. doi:10.1037/0278-6133.24.4.s57.
- Gilbert, D.T.; Pinel, E.C.; Wilson, T.D.; Blumberg, S.K.; Wheately, T. (1998). "Immune neglect: A source of durability bias in affective forecasting". Journal of Personality and Social Psychology 75: 617–638.
- Emanuel, Amber S.; Updegraff, John A.; Kalmbach, David A.; Ciesla, Jeffrey A. (November 2010). "The role of mindfulness facets in affective forecasting". Personality and Individual Differences 49 (7): 815–818.
- Lam, K.C.H.; Buehler, R.; McFarland, C.; Ross, M.; Cheung, I. (2005). "Cultural differences in affective forecasting: the role of focalism". Personality and Social Psychology Bulletin 31 (9): 1296–1309.
- Baer, R.A.; Smith, G.T.; Hopkins, T.; Krietemeyer, J.; Toney, L. (2006). "Using self-report assessment methods to explore facets of mindfulness". Assessment 13 (1): 27–45.
- Fiske, Susan T. (2004). Social Beings: A Core Motives Approach to Social Psychology. Wiley. ISBN 978-0-471-45151-8.
- Gilbert, Daniel T. (2006). Stumbling on happiness. Alfred A. Knopf. ISBN 978-1-4000-7742-7.
- Sanna, Lawrence J.; Schwarz, Norbert (2004). "Integrating Temporal Biases: The Interplay of Focal Thoughts and Accessibility Experiences". Psychological Science (American Psychological Society) 15 (7): 474–481. doi:10.1111/j.0956-7976.2004.00704.x. PMID 15200632.
- Wilson, Timothy D. (2002). Strangers to Ourselves: Discovering the Adaptive Unconscious. Belknap Press of Harvard University Press. ISBN 0-674-01382-4.
- Hsee, Christopher K.; Hastie, Reid (2006). "Decision and experience: why don't we choose what makes us happy?". Trends in Cognitive Sciences 10 (1): 31–37. doi:10.1016/j.tics.2005.11.007. PMID 16318925.