Evidence map›Paper›PMID 42421634›Full record

ArticleBrain and behavior2026

Theory of Mind and Information Processing Speed in Multiple Sclerosis: Associations With Personality Traits.

Omid Mirmosayyeb, Aynaz Mohammadi, Saeed Vaheb, Mohammad Mohammadi, Aysa Shaygannejad, Jacob Balconi, Mohammad Yazdan Panah, Vahid Shaygannejad

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Article in Brain and behavior, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Omid MirmosayyebIsfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.ORCID https://orcid.org/0000-0002-3756-2985
Aynaz MohammadiSchool of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Saeed VahebIsfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
Mohammad MohammadiSchool of Medicine, Iran University of Medical Sciences, Tehran, Iran.
Aysa ShaygannejadIsfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
Jacob BalconiDepartment of Neurology, Jacobs Comprehensive MS Treatment and Research Center, Jacobs School of Medicine and Biomedical Sciences, University At Buffalo, State University of New York, Buffalo, New York, USA.
Mohammad Yazdan PanahIsfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.ORCID https://orcid.org/0000-0001-9112-9544
Vahid ShaygannejadIsfahan Neurosciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.ORCID https://orcid.org/0009-0008-6960-1265

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCognitive impairment, particularly decreased information processing speed (IPS), is a common symptom of multiple sclerosis (MS). Social cognition (SC) is also affected, but it is less studied, and the influence of personality traits on theory of mind (ToM), a key component of SC, and IPS remains unclear. Therefore, this study examined how IPS and ToM are associated with personality traits, demographic factors, and clinical factors in people with MS (PwMS).

methodsThis cross-sectional study included 100 PwMS attending a tertiary MS clinic in Isfahan, Iran. Demographic (age, sex, education, employment, marital status) and clinical data (disease type, duration, disability, and treatment) were collected. Personality traits were evaluated using the NEO Five-Factor Inventory (FFI), ToM using the Reading the Mind in the Eyes Test (RMET), and IPS using the Symbol Digit Modalities Test (SDMT). Spearman correlations and linear regression analysis were used to examine associations.

resultsThe SDMT was correlated positively with the RMET (r = 0.35, p < 0.001) and Conscientiousness (r = 0.31, p = 0.001) and negatively with Expanded Disability Status Scale (EDSS) (r = -0.33, p < 0.001). The RMET was correlated with Extraversion (r = 0.31, p = 0.002), Agreeableness (r = 0.31, p = 0.002), Conscientiousness (r = 0.35, p < 0.001), and Openness (r = 0.40, p < 0.001). In multivariate regression analyses, the SDMT was associated with higher RMET (B = 0.37, p = 0.009) and lower EDSS (B = -1.98, p = 0.004). The RMET was associated with Openness (B = 0.43, p < 0.001), Agreeableness (B = 0.17, p = 0.020), and Conscientiousness (B = 0.18, p = 0.006).

conclusionToM was associated with personality traits, while IPS was associated with ToM performance and disability. Taken together, these cross-sectional associations suggest that cognitive functioning in MS may relate to both brain- and person-related factors.

Indexed as

Multiple SclerosisPersonalityProcessing SpeedTheory of MindAdultCross-Sectional StudiesFemaleHumansMaleMiddle AgedNeuropsychological TestsSocial Cognitioncognitioninformation processing speedmultiple sclerosispersonalitysocial cognition

Identifiers

PMID42421634
PMCPMC13347168

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