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In psychology and logic, rationalization or rationalisation (also known as making excuses) is a defense mechanism in which controversial behaviors or feelings are justified and explained in a seemingly rational or logical manner to avoid the true explanation, and are made consciously tolerable—or even admirable and superior—by plausible means. It is also an informal fallacy of reasoning.
Rationalization happens in two steps:
- A decision, action, judgement is made for a given reason, or no (known) reason at all.
- A rationalization is performed, constructing a seemingly good or logical reason, as an attempt to justify the act after the fact (for oneself or others).
Rationalization encourages irrational or unacceptable behavior, motives, or feelings and often involves ad hoc hypothesizing. This process ranges from fully conscious (e.g. to present an external defense against ridicule from others) to mostly unconscious (e.g. to create a block against internal feelings of guilt or shame). People rationalize for various reasons—sometimes when we think we know ourselves better than we do. Rationalization may differentiate the original deterministic explanation of the behavior or feeling in question.[clarification needed]
Quintilian and classical rhetoric used the term color for the presenting of an action in the most favourable possible perspective. Laurence Sterne in the eighteenth century took up the point, arguing that, were a man to consider his actions, "he will soon find, that such of them, as strong inclination and custom have prompted him to commit, are generally dressed out and painted with all the false beauties [color] which, a soft and flattering hand can give them".
According to the DSM-IV, rationalization occurs "when the individual deals with emotional conflict or internal or external stressors by concealing the true motivations for his or her own thoughts, actions, or feelings through the elaboration of reassuring or self serving but incorrect explanations." 
- Rationalization can be used to avoid admitting disappointment: "I didn't get the job that I applied for, but I really didn't want it in the first place."
Egregious rationalizations intended to deflect blame can also take the form of ad hominem attacks or DARVO. Some rationalizations take the form of a comparison. Commonly this is done to lessen the perception of an action's negative effects, to justify an action, or to excuse culpability:
- "At least [what occurred] is not as bad as [a worse outcome]."
- In response to an accusation: "At least I didn't [worse action than accused action]."
- As a form of false choice: "Doing [undesirable action] is a lot better than [a worse action]."
- In response to unfair or abusive behaviour: "I must have done something wrong if they treat me like this."
Based on anecdotal and survey evidence, John Banja states that the medical field features a disproportionate amount of rationalization invoked in the "covering up" of mistakes. Common excuses made are:
- "Why disclose the error? The patient was going to die anyway."
- "Telling the family about the error will only make them feel worse."
- "It was the patient's fault. If he wasn't so (sick etc), this error wouldn't have caused so much harm."
- "Well, we did our best. These things happen."
- "If we're not totally and absolutely certain the error caused the harm, we don't have to tell."
- "They're dead anyway, no point in blaming."
- Collective rationalizations are regularly constructed for acts of aggression, based on exaltation of the in-group and demonisation of the opposite side: as Fritz Perls put it, "Our own soldiers take care of the poor families; the enemy rapes them".
- Celebrity culture can be seen as rationalizing the gap between rich and poor, powerful and powerless, by offering participation to both dominant and subaltern views of reality.
Ernest Jones introduced the term "rationalization" to psychoanalysis in 1908, defining it as "the inventing of a reason for an attitude or action the motive of which is not recognized"'—an explanation which (though false) could seem plausible. The term (Rationalisierung in German) was taken up almost immediately by Sigmund Freud to account for the explanations offered by patients for their own neurotic symptoms.
As psychoanalysts continued to explore the glossed of unconscious motives, Otto Fenichel distinguished different sorts of rationalization—both the justifying of irrational instinctive actions on the grounds that they were reasonable or normatively validated, and the rationalizing of defensive structures, whose purpose is unknown on the grounds that they have some quite different but somehow logical meaning.
Later psychoanalysts are divided between a positive view of rationalization as a stepping-stone on the way to maturity, and a more destructive view of it as splitting feeling from thought, and so undermining the powers of reason.
Leon Festinger highlighted in 1957 the discomfort caused people by awareness of inconsistent thought. Rationalization can reduce such discomfort by explaining away the discrepancy in question, as when people who take up smoking after previously quitting decide that the evidence for it being harmful is less than they previously thought.
- Anangeon (or dicaeologia)
- Affirming the consequent
- Criminals from a sense of guilt
- Displacement (psychology)
- Illusory superiority
- Just-world phenomenon
- Minimisation (psychology)
- Psychological projection
- Psychological repression
- Reaction formation
- Regression (psychology)
- Spin (public relations)
- Splitting (psychology)
- Victim blaming
- Understanding Rationalization: Making Excuses as an Effective Manipulation Tactic
- "Definition of rationalization". Retrieved 25 September 2011.
- Dowden, Bradley. "Fallacy § Rationalization". Internet Encyclopedia of Philosophy.
- Kendra Van Wagner. "Defense Mechanisms – Rationalization". About.com: Psychology. Retrieved 2008-02-24.
- "Defenses". www.psychpage.com. Retrieved 2008-03-11.
- Peter Green trans., Juvenal: The Sixteen Satires "Middlesex 1982) p. 156
- Lawrence Sterne, Tristram Shandy (Middlesex 1976) p. 147
- Association, published by the American Psychiatric (2000). DSM-IV-TR : diagnostic and statistical manual of mental disorders. (4TH ED. ed.). United States: AMERICAN PSYCHIATRIC PRESS INC (DC). p. 812. ISBN 978-0-89042-025-6.
- Banja, John (2004). Medical Errors and Medical Narcissism. Sudbury: Jones and Bartlett. ISBN 0-7637-8361-7.
- Smith & Mackie 2007, p. 513.
- Fritz Perls, Gestalt Theory Verbatim (Bantam 1971) p. 9
- P. D. Marshall, Celebrity and Power (1997) pp. 48–9
- Adam Phillips, On Flirtation (London 1994) p. 109
- Brenda Maddox, Freud's Wizard (London 2006) p. 61
- Sigmund Freud, Case Histories II (London 1991) p. 184
- Sigmund Freud, "Psychoanalytische Bemerkungen über einen autobiographisch beschriebenen Fall von Paranoia (Dementia Paranoides)", 1911
- Otto Fenichel, The Psychoanalytic Theory of Neurosis (London 1946) pp. 485–6
- Bateman, Anthony; Holmes, Jeremy (1995). Introduction to Psychoanalysis: Contemporary Theory and Practice. Psychology Press. p. 92. ISBN 9780415107396.
- Symington, Neville (1993). Narcissism: A New Theory. Karnac Books. p. 119. ISBN 9781781811252.
- Smith & Mackie 2007, pp. 277–8.
- Smith & Mackie 2007, pp. 280–4.
- Smith, Eliot R.; Mackie, Diane M. (2007). Social Psychology (3rd ed.). Psychology Press. ISBN 9781841694092.
- McLaughlin, Brian P.; Rorty, Amélie, eds. (1988). Perspectives on Self-deception. University of California Press. ISBN 9780520061231.
- Tsang, Jo-Ann (2002). "Moral rationalization and the integration of situational factors and psychological processes in immoral behavior" (PDF). Review of General Psychology. 6 (1): 25–50. doi:10.1037/1089-26184.108.40.206.