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Related Experiment Video

Updated: Oct 25, 2025

Signal Attenuation as a Rat Model of Obsessive Compulsive Disorder
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Thought Disorder on Object Sorting Test Is Associated with Executive Dysfunction in Schizophrenia.

B R Sahithya1, Shweta Rai2, Rishikesh V Behere3

  • 1Dept. of Clinical psychology, Dharwad Institute of Mental Health and Neurosciences, Dharwad, Karnataka, India.

Indian Journal of Psychological Medicine
|August 5, 2021
PubMed
Summary

Schizophrenia patients show impaired executive functions and concept formation. Object sorting test performance correlates with executive dysfunction, linking classical thought disorder to modern cognitive deficits.

Keywords:
Thought disorderexecutive functionobject sorting testschizophrenia

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Thought disorder, characterized by aberrant concept formation, is a core schizophrenia disturbance.
  • Executive dysfunction is also a recognized primary deficit in schizophrenia.
  • Classical thought disorder is less emphasized in current nosological systems.

Purpose of the Study:

  • To investigate the association between classical thought disorder and executive dysfunction in schizophrenia.
  • To explore the relationship between aberrant concept formation, concrete abstraction, and executive function deficits.

Main Methods:

  • Thirty schizophrenia patients and thirty healthy controls were recruited.
  • Participants were assessed using the Object Sorting Test (OST) and various executive function tests.
  • Screening was conducted using the MINI 5.0 for diagnostic confirmation.

Main Results:

  • Schizophrenia patients exhibited significantly poorer performance on all executive function domains and the OST.
  • Peculiar scores on the OST correlated with mental speed, focused attention, and divided attention.
  • Impoverished scores on the OST were associated with focused attention, sustained attention, planning, set shifting, perseveration, and concept formation.

Conclusions:

  • Object Sorting Test performance patterns can indicate underlying executive dysfunction in schizophrenia.
  • Thought disorder and executive dysfunction share overlapping conceptual constructs.
  • This overlap bridges classical and contemporary understandings of schizophrenia's core deficits.