Self-referential hypermentalization in schizotypy.

Area of Science:

• Cognitive Psychology
• Psychiatry
• Neuroscience

Background:

• Schizophrenia patients show theory of mind (ToM) deficits.
• Findings regarding ToM in schizotypy are inconsistent.
• Self-referential ToM, applying mental state attribution to oneself, requires further investigation.

Purpose of the Study:

• To investigate self-referential theory of mind (ToM) in positive schizotypy.
• To differentiate between hypermentalization and undermentalization errors in self-referential ToM.
• To explore the relationship between self-referential ToM errors and schizotypal traits.

Main Methods:

• Employed a 3-group design: positive schizotypy, psychiatric control, and healthy control.
• Utilized the hinting task and a novel self-referential version to assess ToM.
• Differentiated between hypermentalization and undermentalization error types.

Main Results:

• The positive schizotypy group showed significantly more self-referential hypermentalization errors than control groups.
• Self-referential hypermentalization correlated with referential thinking and aberrant salience.
• These errors were also associated with interpersonal schizotypal traits and functional outcomes.

Conclusions:

• Positive schizotypy is characterized by an over-attribution of mental states to the self (hypermentalization).
• Self-referential hypermentalization is a key cognitive feature in positive schizotypy.
• This specific ToM deficit has implications for understanding schizotypal traits and functional impairment.