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Related Experiment Videos

Defense mechanisms and personality in depression.

L S Mullen1, C Blanco, S C Vaughan

  • 1Department of Psychiatry, College of Physicians & Surgeons, New York, New York, USA. lsm23@columbia.edu

Depression and Anxiety
|February 26, 2000
PubMed
Summary

Personality structure may be more stable than previously thought, even during treatment for major depressive disorder (MDD). Defense mechanisms and personality organization showed stability, suggesting enduring traits despite clinical changes.

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Area of Science:

  • Psychiatry and Clinical Psychology
  • Personality Disorders and Traits
  • Treatment of Mood Disorders

Background:

  • Traditional views posit personality stability, but Axis I disorders and their treatments may influence personality assessment.
  • An alternative framework defines personality through defense mechanisms and personality organization, distinct from phenomenological systems.
  • This study investigates the stability of these dynamic character traits during treatment for major depressive disorder (MDD).

Purpose of the Study:

  • To test the hypothesis that defense mechanisms and personality organization are stable in patients treated for MDD, regardless of treatment response.
  • To determine if defense mechanisms or personality organization predict treatment response or dropout rates in MDD.
  • To explore enduring personality characteristics independent of Axis I disorder status.

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Main Methods:

  • Patients with major depressive disorder (MDD) enrolled in randomized controlled medication trials.
  • Defensive functioning assessed using the Defense Style Questionnaire (DSQ).
  • Personality organization evaluated with the Inventory of Personality Organization (IPO) at baseline and post-treatment.

Main Results:

  • Baseline 'image-distorting' defenses were more prevalent in drop-outs than responders.
  • A significant decrease in 'maladaptive' defenses was observed post-treatment across the sample and in responders.
  • Medication responders exhibited less 'maladaptive' defenses and healthier 'overall defensive functioning' compared to non-responders post-treatment.

Conclusions:

  • Defense mechanisms and personality organization appear relatively stable during MDD treatment, suggesting enduring personality traits.
  • While maladaptive defenses may decrease with treatment, core personality structures remain consistent.
  • Specific defense patterns may predict treatment outcomes, highlighting their clinical relevance.