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Updated: Dec 24, 2025

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Rationalization is a suboptimal defense mechanism associated with clinical and forensic problems.

Stuart Brody1, Rui Miguel Costa2

  • 1Department of Psychology, Charles University in Prague, Praha 1, Czech Republicstuartbrody@hotmail.comwww.DrStuartBrody.com.

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Summary

Rationalization, a defense mechanism, is often viewed as rational but is actually suboptimal. Evidence links it to poor emotional development and antisocial behaviors like shoplifting, pedophilia, and murder.

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Area of Science:

  • Psychology
  • Forensic Psychology
  • Clinical Psychology

Background:

  • Rationalization is often considered a rational cognitive process.
  • This perspective is challenged by evidence suggesting it may be a suboptimal defense mechanism.

Purpose of the Study:

  • To evaluate the rationality of rationalization as a defense mechanism.
  • To examine empirical evidence linking rationalization to psychological and behavioral outcomes.

Main Methods:

  • Review of empirical clinical and forensic psychological evidence.
  • Analysis of studies associating rationalization with developmental and behavioral issues.

Main Results:

  • Rationalization is empirically supported as a suboptimal defense mechanism.
  • A significant association exists between rationalization and poorer emotional development.
  • Rationalization is linked to a spectrum of antisocial behaviors, including shoplifting, pedophilia, and murder.

Conclusions:

  • Rationalization is not a rational defense mechanism.
  • Its use is associated with negative psychological and behavioral consequences.
  • Further research into the clinical and forensic implications of rationalization is warranted.