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154. Defeatist Performance Beliefs Predict Negative Symptoms in Daily Life for People with Schizophrenia: Evidence form Ecological Momentary Assessment and Geolocation
Prior studies using trait questionnaires have demonstrated that individuals with schizophrenia (SZ) have more severe defeatist performance beliefs (DPBs) than healthy controls (CN). Trait DPBs predict increased severity of avolition, anhedonia, and asociality and reflect a core psychological mechanism underlying negative symptoms. The current study examined whether DPBs can explain state-dependent changes in negative symptom severity in daily life. Thirty-six individuals with SZ and 46 CN completed 6 days of Ecological Momentary Assessment, during which 8 daily surveys examined DPB, symptoms, and current circumstances (who they are with if anyone, what they are doing if anything, where they are located). Additionally, geolocation passively recorded movement and time spent at home. Compared to CN, SZ demonstrated more severe DPBs and failed to modulate DPB in goal-directed and social situations. State fluctuations in anhedonia, avolition, and asociality, as well as reductions in the amount of movement and time spent at home all predicted DPBs. That state fluctuations in DPBs have direct temporal effects on negative symptoms measured in everyday life further strengthens the support for the cognitive model of negative symptoms. These findings have direct application for improving interventions aimed at ameliorating negative symptoms in schizophrenia.