Defense Mechanism Test and electrodermal activity

Area of Science:

• Psychology
• Psychophysiology
• Clinical Psychology

Background:

• Psychological disorders like anxiety, affective disorders, and schizophrenia involve complex defense mechanisms.
• The Defense Mechanism Test (DMT) models threat perception and anxiety avoidance.
• Electrodermal activity (EDA) is a key psychophysiological indicator of emotional arousal and stress.

Purpose of the Study:

• To investigate the relationship between electrodermal activity and specific defense mechanisms.
• To test the hypothesis that EDA increases with anxiety and decreases with effective defense strategies.
• To analyze EDA patterns in patients with anxiety, affective, and schizophrenic disorders during a threat perception task.

Main Methods:

• Utilized Andersson's modified Defense Mechanism Test (DMT) with 21 patients diagnosed with anxiety, affective, or schizophrenic disorders.
• Registered electrodermal activity (EDA) including skin conductance and nonspecific responses during DMT exposures.
• Categorized patient responses into Anxiety, Isolation, Denial, Repression, Introaggression, and threat identification.

Main Results:

• Significant EDA increases were observed during responses categorized as Anxiety.
• EDA significantly decreased after successful threat identification (no longer subliminal).
• EDA decreased following Isolation responses, while Denial, Repression, and Introaggression responses showed increased EDA or nonspecific responses, suggesting insufficient defense.

Conclusions:

• Findings support the hypothesis that EDA reflects defense mechanisms during threat.
• Increased EDA may indicate insufficient or maladaptive defense strategies in patients with psychological disorders.
• EDA serves as a valuable psychophysiological marker for assessing defense mechanisms in clinical populations.