Differential linguistic patterns across Rorschach, TAT, and SCT in individuals with PTSD

Area of Science:

• Psychology
• Linguistics
• Psychiatry

Background:

• Limited comparative studies exist on linguistic markers differentiating Post-Traumatic Stress Disorder (PTSD) across projective personality tests.
• Prior research focused on everyday discourse or autobiographical narratives for PTSD linguistic markers.

Purpose of the Study:

• To determine if language features in projective tests distinguish individuals with PTSD from controls.
• To assess the predictive value of these linguistic features for PTSD symptom severity.

Main Methods:

• Natural Language Processing (NLP) analyzed verbatim transcripts from Rorschach, TAT, and SCT tests for 283 participants (183 PTSD, 100 controls).
• Linguistic categories included negative/positive emotion, insight, causation, body-relatedness, and self-focus.
• Statistical analyses (ANCOVA, hierarchical regression) controlled for covariates and assessed predictive validity.

Main Results:

• Four linguistic indicators showed significant group differences: Rorschach Negative Emotion, SCT Positive Emotion, SCT Insight, and TAT Negative Emotion.
• In the PTSD group, TAT Negative Emotion strongly predicted PTSD, depressive, and anxiety severity.
• Reduced Rorschach Body-related language and elevated SCT Insight correlated with higher symptom burden; TAT Positive Emotion negatively predicted severity.

Conclusions:

• PTSD criteria individuals exhibited reduced somatic language and elevated negative emotional expression.
• Self-referential processing and positive emotional expression were markers in non-clinical individuals, requiring cautious interpretation due to demographic imbalances.
• Projective linguistic analysis shows potential as a supplementary tool in trauma research, pending validation and replication.