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Factorial structure of the ‘ToM Storybooks’: A test evaluating multiple components of Theory of Mind
Authors:Daniela Bulgarelli  Silvia Testa  Paola Molina
Affiliation:Department of Psychology, University of Torino, Italy
Abstract:This study examined the factorial structure of the Theory of Mind (ToM) Storybooks, a comprehensive 93‐item instrument tapping the five components in Wellman's model of ToM (emotion recognition, understanding of desire and beliefs, ability to distinguish between physical and mental entities, and awareness of the link between perception and knowledge). A sample of 681 three‐ to eight‐year‐old Italian children was divided into three age groups to assess whether factorial structure varied across different age ranges. Partial credit model analysis was applied to the data, leading to the empirical identification of 23 composite variables aggregating the ToM Storybooks items. Confirmatory factor analysis was then conducted on the composite variables, providing support for the theoretical model. There were partial differences in the specific composite variables making up the dimensions for each of the three age groups. A single test evaluating distinct dimensions of ToM is a valuable resource for clinical practice which may be used to define differential profiles for specific populations.
Keywords:Theory of Mind (ToM)  ToM Storybooks  confirmatory factor analysis  comprehensive test
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