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156. Preliminary reliability analyses for the English version of two social cognition tests : the Combined Stories Test and the Social Knowledge Test
Theory of mind (ToM) and social knowledge are often impaired in several psychiatric populations but there is a lack of reliable measures to assess these two domains. The Combined Stories Test (COST) and the Social Knowledge Test (SKT), assessing respectively ToM and social knowledge, have been developed in French and show good psychometric properties, including excellent test-retest and inter-rater reliability, in healthy participants and in people with schizophrenia. However, the reliability of the English version of these tests had not yet been evaluated. Our objective was to present preliminary analyses regarding the reliability of the COST and the SKT in healthy English-speaking participants. To date, the two tests were administered twice to 9 participants with a 4 weeks delay between the assessments. A good test-retest reliability and no evidence of practice effect was observed for the COST (ρ=0.73; t(5)1.228, p=0.274) and the SKT (ρ=0.70; t(6)0.354, p=0.736). An excellent inter-rater reliability was observed for the COST items with ratings on a two (κ=1.00, p<0.001) or three-point (κ=0,82, p<0.001) scale, as well as for the SKT (κ=0.92, p<0.001). These preliminary results suggest good reliability for the English version of these two social cognition tests. These results will however need to be extended with additional participants and/or in different settings.