Deductive reasoning abilities in schizophrenia and related disorders: A systematic review

Ahmed Abdelhaim Moustafa, Anchal Garg, Ahmed A. Helal, Eid Abo Hamza

Research output: Chapter in Book/Report/Conference proceedingChapterResearchpeer-review


Background: Schizophrenia is a psychiatric disorder characterized by delusions, hallucinations, negative symptoms, and disorganized thinking. There has been a multitude of studies assessing reasoning performance in schizophrenia patients by using various reasoning tasks.

Methods: We reviewed the existing literature using the following reasoning tasks in schizophrenia and related disorders: Transitive Inferences, Wason Card Selection, conditional reasoning, syllogisms, and other related tasks. Results: Some deductive reasoning studies have reported conflicting results where schizophrenia patients sometimes, outperform or underperform healthy controls. These findings are related to the plausibility, emotional content of logical sentences used in these studies. Importantly, data show that performance in deductive reasoning tasks is impacted by emotional and cognitive processes, such as theory of mind and working memory. However, neural studies report different brain mechanisms underlying different deductive reasoning task performance.

Conclusions: Overall, there are differences in the findings of reasoning tasks which should be investigated in future studies as it will contribute towards an accurate understanding of reasoning processes in schizophrenia spectrum and related disorders.
Original languageEnglish
Title of host publicationCognitive and Behavioral Dysfunction in Schizophrenia
EditorsAhmed A. Moustafa
PublisherAcademic Press
Number of pages17
ISBN (Electronic)9780128200056
Publication statusPublished - 2021
Externally publishedYes


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