Conscientiousness is the personality trait of being careful, or vigilant. Conscientiousness implies a desire to do a task well, and to take obligations to others seriously. Conscientious people tend to be efficient and organized as opposed to easy-going and disorderly. They exhibit a tendency to show self-discipline, act dutifully, and aim for achievement; they display planned rather than spontaneous behavior; and they are generally dependable. It is manifested in characteristic behaviors such as being neat and systematic; also including such elements as carefulness, thoroughness, and deliberation (the tendency to think carefully before acting.) Conscientiousness is one of the five traits of the Five Factor Model of personality and is an aspect of what has traditionally been referred to as having character. Conscientious individuals are generally hard-working and reliable. They are also likely to be conformists. When taken to an extreme, they may also be "workaholics", perfectionists, and compulsive in their behavior. People who score low on conscientiousness tend to be laid back, less goal-oriented, and less driven by success; they also are more likely to engage in antisocial and criminal behavior.
- 1 Personality models
- 2 Origin
- 3 Measurement
- 4 Behavior
- 4.1 Development
- 4.2 Daily life
- 4.3 Academic and workplace performance
- 4.4 Subjective well-being
- 4.5 Problematic life outcomes
- 4.6 Health and longevity
- 4.7 Relationships
- 4.8 Fertility
- 4.9 Conformity
- 4.10 Intelligence
- 4.11 Political attitudes and obedience to authority
- 4.12 Creativity
- 4.13 Adaptability
- 4.14 Religiosity
- 5 Geography
- 6 See also
- 7 References
Conscientiousness is one of the five major dimensions in the Big Five model (also called Five Factor Model) of personality, which also consists of extraversion, neuroticism, openness to experience, and agreeableness (OCEAN acronym). Two of many personality tests that assess these traits are Costa and McCrae's NEO PI-R and Goldberg's NEO-IPIP. According to these models, conscientiousness is considered to be a continuous dimension of personality, rather than a categorical 'type' of person.
Conscientiousness is related to impulse control, but it should not be confused with the problems of impulse control associated with other personality traits, such as (high) extraversion, (low) agreeableness, (high) openness and (high) neuroticism. Individuals low on conscientiousness are unable to motivate themselves to perform a task that they would like to accomplish. Recently, conscientiousness has been broken down, further, into two "aspects": orderliness and industrious, the former which is associated with the desire to keep things organized and tidy and the latter which is associated more closely with productivity and work ethic. Conscientiousness, along with (lower) openness, is also one of the trait markers of political conservatism.
The trait cluster of conscientiousness overlaps with other models of personality, such as C. Robert Cloninger's Temperament and Character Inventory, in which it is related to both self-directedness and persistence. It also includes the specific traits of rule consciousness and perfectionism in Cattell's 16 PF model. It is negatively associated with impulsive sensation-seeking in Zuckerman's alternative five model. Traits associated with conscientiousness are frequently assessed by self-report integrity tests given by various corporations to prospective employees.
Terms such as 'hard-working,' 'reliable,' and 'persevering' describe desirable aspects of character. Because it was once believed to be a moral evaluation, conscientiousness was overlooked as a real psychological attribute. The reality of individual differences in conscientiousness has now been clearly established by studies of cross-observer agreement. Peer and expert ratings confirm the self-reports that people make about their degrees of conscientiousness. Furthermore, both self-reports and observer ratings of conscientiousness predict real-life outcomes such as academic success. During most of the 20th century, psychologists believed that personality traits could be divided into two categories: temperament and character. Temperament traits were thought to be biologically based, whereas character traits were thought to be learned either during childhood or throughout life. With the advent of the FFM (Five-Factor Model), behavior geneticists began systematic studies of the full range of personality traits, and it soon became clear that all five factors are substantially heritable. Identical twins showed very similar personality traits even when they had been separated at birth and raised apart, and this was equally true for both character traits and temperament traits. Parents and communities influence the ways in which conscientiousness is expressed, but they apparently do not influence its level.
A person's level of conscientiousness is generally assessed using self-report measures, although peer-reports and third-party observation can also be used. Self-report measures are either lexical or based on statements. Deciding which measure of either type to use in research is determined by an assessment of psychometric properties and the time and space constraints of the study being undertaken.
Lexical measures use individual adjectives that reflect conscientiousness traits, such as efficient and systematic, and are very space and time efficient for research purposes. Goldberg (1992) developed a 20-word measure as part of his 100-word Big Five markers. Saucier (1994) developed a briefer 8-word measure as part of his 40-word mini-markers. Thompson (2008)  systematically revised these measures to develop the International English Mini-Markers which has superior validity and reliability in populations both within and outside North America. Internal consistency reliability of the International English Mini-Markers for the Conscientiousness measure for native English-speakers is reported as .90, that for non-native English-speakers is .86.
Statement measures tend to comprise more words than lexical measures, so hence consume more research instrument space and more respondent time to complete. Respondents are asked the extent to which they, for example, Often forget to put things back in their proper place, or Am careful to avoid making mistakes. Some statement-based measures of conscientiousness have similarly acceptable psychometric properties in North American populations to lexical measures, but their generally emic development makes them less suited to use in other populations. For instance, statements in colloquial North American English like Often forget to put things back in their proper place or Am careful to avoid making mistakes can be hard for non-native English-speakers to understand, suggesting internationally validated measures might be more appropriate for research conducted with non-North Americans.
Currently, little is known about conscientiousness in young children because the self-report inventories typically used to assess it are not appropriate for that age group. It is likely, however, that there are individual differences on this factor at an early age. We know, for example, that some children have attention deficit/hyperactivity disorder (ADHD does not go away with age; however it would still be interesting to understand how neurodevelopmental disorders such as ADHD and autism relate to the development of conscientiousness and other personality traits), which is characterized in part by problems with concentration, organization, and persistence; traits which are related to conscientiousness. Longitudinal and cross-sectional studies suggest that conscientiousness is relatively low among adolescents but increases between 18 and 30 years of age. Research has also shown that conscientiousness generally increases with age from 21 to 60, though the rate of increase does slow.
Individual differences are also strongly preserved, meaning that a careful, neat, and scrupulous 30-year-old is likely to become a careful, neat, and scrupulous 80-year-old.
People who score high on the trait of conscientiousness tend to be more organized and less cluttered in their homes and offices. For example, their books tend to be neatly shelved in alphabetical order, or categorized by topic, rather than scattered around the room. Their clothes tend to be folded and arranged in drawers or closets instead of lying on the floor. The presence of planners and to-do lists are also signs of conscientiousness. Their homes tend to have better lighting than the homes of people who score low on this trait. Recently, ten behaviors strongly associated with conscientiousness were scientifically categorized (the number at the end of each behavior is a correlation coefficient; a negative number means conscientious people were less likely to manifest the behavior):
- Discussed sexual matters with a male friend (−.23)
- Lounged around my house without any clothes on (−.22)
- Picked up a hitch-hiker (−.21)
- Read a tabloid paper (−.19)
- Drove or rode in a car without a seatbelt (−.19)
- Swore around other people (−.18)
- Spent an hour at a time daydreaming (−.18)
- Shopped at a second-hand thrift shop (−.18)
- Told a dirty joke (−.18)
- Listened to music (+.18)
Academic and workplace performance
Conscientiousness is importantly related to successful academic performance in students and workplace performance among managers and workers. Low levels of conscientiousness are strongly associated with procrastination. A considerable amount of research indicates that conscientiousness has a small positive correlation with performance in the workplace, and indeed that after general mental ability is taken into account, the other four of the Big Five personality traits do not aid in predicting career success.:169 Conscientious employees are generally more reliable, more motivated, and harder working. They also have lower rates of absenteeism and counterproductive work behaviors such as stealing and fighting with other employees. Furthermore, conscientiousness is the only personality trait that correlates with performance across all categories of jobs. However, agreeableness and emotional stability may also be important, particularly in jobs that involve a significant amount of social interaction. Of all manager/leader types, top executives show the lowest level of rule-following, a conscientious trait. Conscientiousness is not always positively related to job performance, sometimes the opposite is true.[example needed]
In general, conscientiousness has a positive relationship with subjective well-being, particularly satisfaction with life, so highly conscientious people tend to be happier with their lives than those who score low on this trait. Although conscientiousness is generally seen as a positive trait to possess, recent research has suggested that in some situations it may be harmful for well-being. In a prospective study of 9570 individuals over four years, highly conscientious people suffered more than twice as much if they became unemployed. The authors suggested this may be due to conscientious people making different attributions about why they became unemployed, or through experiencing stronger reactions following failure. This finding is consistent with perspectives which see no trait as inherently positive or negative, but rather the consequences of the trait being dependent on the situation and concomitant goals and motivations.
Problematic life outcomes
Low conscientiousness has been linked to antisocial and criminal behaviors, as well as unemployment, homelessness, and imprisonment. Low conscientiousness and low agreeableness taken together are also associated with substance abuse. People low in conscientiousness have difficulty saving money and have different borrowing practices than conscientious people. High conscientiousness is associated with more careful planning of shopping trips and less impulse buying of unneeded items. Conscientiousness has been found to be positively correlated with business white collar crime.
Health and longevity
According to an 80-year old and ongoing study started in 1921 by psychologist Lewis Terman on over 1,500 gifted adolescent Californians, "The strongest predictor of long life was conscientiousness."[better source needed] Specific behaviors associated with low conscientiousness may explain its influence on longevity. Nine different behaviors that are among the leading causes of mortality—alcohol use, disordered eating (including obesity), drug use, lack of exercise, risky sexual behavior, risky driving, tobacco use, suicide, and violence—are all predicted by low conscientiousness. Health behaviors are more strongly correlated with the conventionality rather than the impulse-control aspect of conscientiousness. Apparently, social norms influence many health-relevant behavior, such as healthy diet and exercise, not smoking and moderate drinking, and highly conscientious people adhere the most strongly to these norms. Additionally, conscientiousness is positively related to health behaviors such as regular visits to a doctor, checking smoke alarms, and adherence to medication regimens. Such behavior may better safeguard health and prevent disease.[better source needed]
Relationship quality is positively associated with partners' level of conscientiousness, and highly conscientious people are less likely to get divorced. Conscientiousness is associated with lower rates of behavior associated with divorce, such as extramarital affairs, spousal abuse, and alcohol abuse. Conscientious behaviors may have a direct influence on relationship quality, as people low in conscientiousness are less responsible, less responsive to their partners, are more condescending, and less likely to hold back offensive comments. On the other hand, more conscientious people are better at managing conflict and tend to provoke fewer disagreements, perhaps because they elicit less criticism due to their well-controlled and responsible behavior.[better source needed]
|This section needs expansion. You can help by adding to it. (February 2016)|
Fertility has been found to decrease in women who exhibit higher levels of conscientiousness.
Conscientiousness (all its subfactors) correlate significantly with conformity (+0.33, p < 0.01).
A study from 2004 found conscientiousness was significantly negatively correlated with intelligence. Conscientiousness significantly correlated negatively with abstract reasoning (−0.26) and verbal reasoning (−0.23).
Large unselected studies, however have found null relationships, and the negative relationship sometimes found in selected samples such as universities may result from students whose low ability would reduce their chance of gaining entrance, but who have higher conscientiousness, gaining their GPA via hard work rather than giftedness.
A large study found that fluid intelligence was significantly negatively correlated with the order (−0.15), self-discipline (−0.08), and deliberation (−0.09) subfactors of conscientiousness (all correlations significant with p < 0.001.).
Conscientiousness has a weak positive relationship with conservative political attitudes. Conscientiousness significantly correlates positively with right-wing authoritarianism. Although right-wing authoritarianism is one of the most powerful predictors of prejudice, a large scale meta-analysis found that conscientiousness itself is uncorrelated with general prejudice. Conscientiousness is positively correlated with support for capital punishment. Rebellion against control is significantly negatively correlated with conscientiousness.
Conscientiousness is associated with rule compliance, obedience and conventional integrity.
The dependability subfactors (order, dutifulness, and deliberation) of conscientiousness correlate negatively with creativity while the achievement subfactors correlate positively. Another study showed that people who score high on the order subfactor of conscientiousness show less innovative behavior. Group conscientiousness has a negative effect on group performance during creative tasks. Groups with only conscientious members have difficulty solving open-ended problems.
A study from 2006 found that those scoring low on conscientiousness make better decisions after unanticipated changes in the context of a task. Specifically, the subfactors order, dutifulness, and deliberation negatively correlated with decision-making quality, but not competence, achievement striving, and self-discipline.
General religiosity was mainly related to Agreeableness and Conscientiousness of the big five traits .
Average levels of conscientiousness vary by state in the United States. People living in the central part, including the states of Kansas, Nebraska, Oklahoma, and Missouri, tend to have higher scores on average than people living in other regions. People in the southwestern states of New Mexico, Utah, and Arizona also have relatively high average scores on conscientiousness. Among the eastern states, Florida is the only one that scores in the top ten for this personality trait. The four states with the lowest scores on conscientiousness on average were, in descending order, Rhode Island, Hawaii, Maine, and Alaska.
A large scale survey of residents of Great Britain found that average levels of all the Big Five, including conscientiousness, vary across regional districts in England, Wales and Scotland. High levels of conscientiousness were found throughout much of Southern England, scattered areas of the Midlands, and most of the Scottish Highlands. Low levels of conscientiousness were observed in London, Wales, and parts of the North of England. Higher mean levels of regional conscientiousness were positively correlated with voting for the Conservative Party, and negatively correlated with voting for the Labour Party, in the 2005 and 2010 elections, and also correlated with a higher proportion of married residents, with higher life expectancy for men and women, fewer long-term health problems, and with lower rates of mortality from stroke, cancer, and heart disease. Higher regional conscientiousness was also correlated with lower median annual income in 2011.
- Thompson, E.R. (October 2008). "Development and Validation of an International English Big-Five Mini-Markers". Personality and Individual Differences. 45 (6): 542–548. doi:10.1016/j.paid.2008.06.013.
- DeYoung, Colin; Peterson, Jordan; Higgins, Daniel (2002). "Higher-order factors of the Big Five predict conformity: Are there neuroses of health?" (PDF). Personality and Individual Differences. 33 (4): 533–552. doi:10.1016/s0191-8869(01)00171-4.
- Carter, Nathan L.; Guan, Li; Maples, Jessica L.; Williamson, Rachel L.; Miller, Joshua D. (2015). "The downsides of extreme conscientiousness for psychological wellbeing: The role of obsessive compulsive tendencies". Journal of Personality. Accepted Article (4): n/a. doi:10.1111/jopy.12177.
- Ozer, D. J.; Benet-Martínez, V. (2006). "Personality and the prediction of consequential outcomes". Annual Review of Psychology. 57: 401–421. PMID 16318601. doi:10.1146/annurev.psych.57.102904.190127.
- Costa, P. T. & McCrae, R. R. (1992). NEO personality Inventory professional manual. Odessa, FL: Psychological Assessment Resources.
- DeYoung, C. G.; Quilty, L. C.; Peterson, J. B. (2007). "Between facets and domains: 10 aspects of the Big Five". Journal of Personality and Social Psychology. 93 (5): 880–896. PMID 17983306. doi:10.1037/0022-35220.127.116.110.
- Hirsh, J.B., DeYoung, C.G., Xu, X., & Peterson, J.B. (2010). Compassionate liberals and polite conservatives. Personality and Social Psychology Bulletin, 655–664.
- De Fruyt, F.; Van De Wiele, L.; Van Heeringen, C. (2000). "Cloninger's Psychobiological Model of Temperament and Character and the Five-Factor Model of Personality". Personality and Individual Differences. 29 (3): 441–452. doi:10.1016/S0191-8869(99)00204-4.
- McCrae, Robert. (2004). "Conscientiousness" Encyclopedia of Applied Psychology, Three-Volume Set. Academic Press. p. 470
- Goldberg, L.R.; Johnson, JA; Eber, HW; et al. (2006). "The international personality item pool and the future of public-domain personality measures". Journal of Research in Personality. 40 (1): 84–96. doi:10.1016/j.jrp.2005.08.007.
- Goldberg, L.R. (1992). "The development of markers for the Big-Five factor structure". Psychological Assessment. 4 (1): 26–42. doi:10.1037/1040-3518.104.22.168.
- Saucier, G (1994). "Mini-Markers – a brief version of Goldberg’s unipolar big-five markers". Journal of Personality Assessment. 63 (3): 506–516. PMID 7844738. doi:10.1207/s15327752jpa6303_8.
- Piedmont, R.L.; Chae, J.H. (1997). "Cross-cultural generalizability of the five-factor model of personality – Development and validation of the NEO PI-R for Koreans". Journal of Cross-Cultural Psychology. 28 (2): 131–155. doi:10.1177/0022022197282001.
- http://70-40-202-166.bluehost.com/drjwilcoxson/wp-content/uploads/2008/08/personality-article.pdf[permanent dead link]
- Gosling, S. (2008). Snoop: What your stuff says about you?. New York: Basic Books.
- Hirsh, J.B.; DeYoung, C.G.; Peterson, J.B. (2009). "Metatraits of the Big Five differentially predict engagement and restraint of behavior". Journal of Personality. 77 (4): 1085–1101. doi:10.1111/j.1467-6494.2009.00575.x.
- Higgins, D.M.; Peterson, J.B.; Lee, A.; Pihl, R.O. (2007). "Prefrontal cognitive ability, intelligence, Big Five personality and the prediction of advanced academic and workplace performance". Journal of Personality and Social Psychology. 93 (2): 298–319. PMID 17645401. doi:10.1037/0022-3522.214.171.1248.
- Dewitt, S.; Schouwenburg, H. C. (2002). "Procrastination, temptations, and incentives: The struggle between the present and the future in procrastinators and the punctual". European Journal of Personality. 16 (6): 469–489. doi:10.1002/per.461.
- J. F. Salgado (February 1997). "The five factor model of personality and job performance in the European community". Journal of Applied Psychology. 82 (1): 30–43. PMID 9119797. doi:10.1037/0021-9010.82.1.30.
- Schmidt, Frank L.; Hunter, John (2004). "General Mental Ability in the World of Work: Occupational Attainment and Job Performance" (PDF). Journal of Personality and Social Psychology. 86 (1): 162–173. PMID 14717634. doi:10.1037/0022-35126.96.36.199. Archived from the original (PDF) on 2011-10-28. Retrieved 2010-07-12.
- Roberts, B.W.; Jackson, J.J.; Fayard, J.V.; Edmonds, G.; Meints, J (2009). "Chapter 25. Conscientiousness". In Mark R. Leary, & Rick H. Hoyle. Handbook of Individual Differences in Social Behavior. New York/London: The Guildford Press. pp. 257–273. ISBN 978-1-59385-647-2.
- M. K. Mount, M. R. Barrick and G. L. Stewart (1998). "Five-factor model of personality and Performance in jobs involving interpersonal interactions". Human Performance. 11 (2): 145–165. doi:10.1080/08959285.1998.9668029.
- MacNab, Donald. "New research shows leaders are persuasive rule-breakers" (PDF). Psychometrics Canada.
- Tett, Robert. "Is Conscientiousness ALWAYS Positively Related to Job Performance?". Wright State University.
- Steel, Piers; Schmidt, Joseph; Shultz, Jonas (2008). "Refining the relationship between personality and Subjective well-being" (PDF). Psychological Bulletin. 134 (1): 138–161. PMID 18193998. doi:10.1037/0033-2909.134.1.138.
- Boyce, C. J., & Wood, A., M., & Brown, G. D. A. (in press). The dark side of conscientiousness: Conscientious people experience greater drops in life satisfaction following unemployment.Journal of Research in Personality
- Wood, A. M., & Tarrier, N. (in press). Positive Clinical Psychology: A new vision and strategy for integrated research and practice.Clinical Psychology Review
- Walton, KE; Roberts, BW. (2004). "On the relationship between substance use and personality traits: abstainers are not maladjusted". J. Res. Personal. 38 (6): 515–35. doi:10.1016/j.jrp.2004.01.002.
- Blickle, G.; Schlegel, A. (2006). "Some Personality Correlates of Business White-Collar Crime". Applied Psychology. 55 (2): 220–233. doi:10.1111/j.1464-0597.2006.00226.x.
- "Psychological Predictors of Long Life: An 80-year study discovers traits that help people to live longer.". Psychology Today. June 5, 2012.
- Skirbekk, Vegard; Blekesaune, Morten (2013). "Personality Traits Increasingly Important for Male Fertility: Evidence from Norway". European Journal of Personality: n/a. doi:10.1002/per.1936.
- DeYoung, Colin; Peterson, Jordan; Higgins, Daniel (2002). "Higher-order factors of the Big Five predict conformity: Are there neuroses of health?" (PDF). Personality and Individual Differences. 33 (4): 533–552. doi:10.1016/s0191-8869(01)00171-4.
- Moutafi, Joanna; Furnham, Adrian; Paltiel, Laurence (2004). "Why is Conscientiousness negatively correlated with intelligence?" (PDF). Personality and Individual Differences. 37 (5): 1013–1022. doi:10.1016/j.paid.2003.11.010. Archived from the original (PDF) on 2014-12-23.
- Luciano, M., Wainwright, M. A., Wright, M. J., & Martin, N. G. (2006). The heritability of conscientiousness facets and their relationship to IQ and academic achievement. Personality and Individual Differences, 40, 1189–1199.
- Murray, A. L.; Johnson, W.; McGue, M.; Iacono, W. G. (2014). "How are conscientiousness and cognitive ability related to one another? A re-examination of the intelligence compensation hypothesis". Personality and Individual Differences. 70: 17. doi:10.1016/j.paid.2014.06.014.
- Moutafi, Joanna; Furnham, Adrian; Crump, John (2006). "What facets of openness and conscientiousness predict fluid intelligence score?". Learning and Individual Differences. 16: 31–42. doi:10.1016/j.lindif.2005.06.003.
- Sibley, Chris G.; Osborne, Danny; Duckitt, John (2012). "Personality and political orientation: Meta-analysis and test of a Threat-Constraint Model". Journal of Research in Personality. 46 (6): 664–677. doi:10.1016/j.jrp.2012.08.002.
- Sibley, Chris; Duckitt, John (2008). "Personality and Prejudice: A Meta-Analysis and Theoretical Review". Pers Soc Psychol Rev. 12 (3): 248. PMID 18641385. doi:10.1177/1088868308319226.
- Palmer, Carl (2014). "The Prejudiced Personality? Using the Big Five to Predict Susceptibility to Stereotyping Behavior". Illinois State University – Department of Politics and Government. SSRN .
- Kandola, Sunpreet Singh; Egan, Vincent (2014). "Individual differences underlying attitudes to the death penalty". Personality and Individual Differences. 66: 48–53. doi:10.1016/j.paid.2014.03.005.
- Watson, David (2001). "Procrastination and the ®ve-factor model: a facet level analysis" (PDF). Personality and Individual Differences. 30: 149–158. doi:10.1016/s0191-8869(00)00019-2.
- Bègue, Laurent; Beauvois, Jean-Léon; Courbert, Didier; Oberblé, Dominique; Lepage, Johan; Duke, Aaron (2014). "Personality Predicts Obedience in a Milgram Paradigm". Journal of Personality. 83 (3): 299. PMID 24798990. doi:10.1111/jopy.12104.
- Hogan, Robert; Johnson, John; Briggs, Stephen (1997). Handbook of Personality Psychology. Academic Press. p. 856. ISBN 978-0-12-134645-4.
- Hirsh, J. B.; DeYoung, C. G.; Xiaowen Xu; Peterson, J. B. (6 April 2010). "Compassionate Liberals and Polite Conservatives: Associations of Agreeableness With Political Ideology and Moral Values". Personality and Social Psychology Bulletin. 36 (5): 655–664. PMID 20371797. doi:10.1177/0146167210366854. See p. 660.
- Reiter-Palmon, Roni; Illies, Jody; Kobe-Cross, Lisa (2009). "Conscientiousness Is Not Always a Good Predictor of Performance: The Case of Creativity". The international journal of creativity & problem solving. 19: 27–45.
- Bakx, Nina. "Which personality traits do innovative people possess?". Universiteit van Amsterdam.
- Robert, Christopher; Cheung, Yu Ha (April 2010). "An examination of the relationship between conscientiousness and group performance on a creative task". Journal of Research in Personality. 44 (2): 222–231. doi:10.1016/j.jrp.2010.01.005.
- Colarelli, Stephen (2003). No best way : an evolutionary perspective on human resource management. Westport, Conn. : Praeger. p. 159. ISBN 0-275-95739-X.
- Lepine, Jeffrey; Colquitt, Jason; Erez, Amir (2000). "Adaptability to changing task context: effects of general cognitive ability, conscientiousness, and openness to experience". Personnel Psychology. 53 (3): 563–593. doi:10.1111/j.1744-6570.2000.tb00214.x.
- Saroglou, Vassilis (2002). "Religion and the five-factors of personality: A meta-analytic review.". Personality and Individual Diffenences: 15–25.
- Stephanie Simon (2008-09-23). "The United States of Mind. Researchers Identify Regional Personality Traits Across America". WSJ.com. Original research article: Peter J. Rentfrow, Samuel D. Gosling and Jeff Potter (2008). "A Theory of the Emergence, Persistence, and Expression of Geographic Variation in Psychological Characteristics". Perspectives on Psychological Science. 3 (5): 339–369. PMID 26158954. doi:10.1111/j.1745-6924.2008.00084.x.
- Rentfrow, Peter J.; Jokela, Markus; Lamb, Michael E. (March 24, 2015). "Regional Personality Differences in Great Britain". PLoS ONE. 10 (3): 1–20. Bibcode:2015PLoSO..1022245R. doi:10.1371/journal.pone.0122245.