Alexithymia and personality disorder functioning styles in paranoid schizophrenia

Area of Science:

• Psychiatry
• Clinical Psychology
• Cognitive Neuroscience

Background:

• Alexithymia, characterized by difficulties in identifying and describing emotions, has shown inconsistent findings in schizophrenia.
• Personality disorder functioning styles may influence the presentation and study of alexithymic features in schizophrenia.

Purpose of the Study:

• To investigate the relationship between alexithymia and personality disorder functioning styles in individuals with paranoid schizophrenia.

Main Methods:

• Employed Chinese versions of the Toronto Alexithymia Scale (TAS-20) and the Parker Personality Measure (PERM).
• Administered the Positive and Negative Syndrome Scale and Hamilton Anxiety and Depression Scales.
• Compared 60 paranoid schizophrenia patients with 60 healthy controls.

Main Results:

• Schizophrenia patients exhibited higher scores on the Positive and Negative Syndrome Scale, TAS subscales ('difficulty identifying feelings,' 'difficulty describing feelings'), Hamilton Depression Scale, and most PERM scales.
• In patients, difficulty identifying feelings predicted all PERM scales, while specific personality styles (antisocial, avoidant, histrionic, paranoid) predicted distinct alexithymia facets.
• In healthy controls, difficulty identifying feelings predicted a dependent style, and anxiety predicted difficulties in identifying and describing feelings.

Conclusions:

• Personality disorder functioning styles, rather than anxiety, depression, psychotic symptoms, or disease duration, were specifically associated with alexithymia in paranoid schizophrenia.
• These findings highlight a potential cognitive-personological substrate in paranoid schizophrenia.
• Further longitudinal research is recommended to understand the role of premorbid or residual personality styles in the disorder.