Do patients with better neuro-cognition have better theory of mind?

Abstract

Introduction

Theory of mind (ToM) has repeatedly been shown to be compromised in many patients with schizophrenia (SCZ). By contrast, the association between ToM deficits and neuro-cognitive functioning (NF) remains uncertain.

Objectives

To investigate the association between ToM functioning and neuro-cognitive functioning in SCZ.

Methods

Fifty-eight outpatients with stable SCZ completed the intention-inferencing task (IIT), in which the ability to infer a character's intentions from 28 short comic strip stories is assessed. They also completed a neuro-cognitive battery comprising the following tests: the Hopkins Verbal Learning Test–Revised (HVLT-R), the Letter Digit Substitution Test (LDST), the Stroop Test (ST), the “Double Barrage” of Zazzo (DBZ), the Modified Card Sorting Test (MCST), Verbal Fluency (VF), the Trail Making Test-Part A (TMT-A) and the Digit Span (DS).

Results

The performance in the IIT significantly correlated with performance in some neuro-cognitive tests including efficiency in DBZ, number of uncorrected mistakes in ST, number of correct categories in MCST and the time needed to succeed the TMT-A. No correlations were found between performance in the ITT and in memory tasks (HVLT-R and DS).

Conclusions

ToM may rely on some neuro-cognitive functions (mainly attention and executive functioning). Elucidating the exact relationship between ToM and NF may be useful as both are targeted in specific psychotherapeutic interventions.

Disclosure of interest

The authors have not supplied their declaration of competing interest.