Behavioural phenotypes of intrinsic motivation in schizophrenia determined by cluster analysis of objectively quantified real-world performance.

Further, given that age, illness duration, antipsychotic medication dosage, and extrapyramidal symptom severity had emerged as correlates of SZ participants’ task performance (Supplementary Table S2 ), we performed similar SZ-only comparisons for these measures, which revealed that omnibus differences were significant for age ( F (2,42) = 3.64, P = 0.035, P boot = 0.034) and medication dosage ( F (2,42) = 4.13, P = 0.023, P boot = 0.031), and marginally nonsignificant for illness duration ( F (2,42) = 3.01, P = 0.060, P boot = 0.056), but nonsignificant for extrapyramidal symptoms ( F (2,42) = 2.03, P = 0.144, P boot = 0.105), across clusters in the SZ sample.

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