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- W4382631946 abstract "Abstract The N400 event‐related brain potential (ERP) semantic priming effect reflects greater activation of contextually related versus unrelated concepts in long‐term semantic memory. Deficits in this measure have been found in persons with schizophrenia and those at clinical high risk (CHR) for this disorder. In CHR patients, we previously found that these deficits predict poorer social functional outcomes after 1 year. In the present study, we tested whether these deficits predicted greater psychosis‐spectrum symptom severity and functional impairment over 2 years. We measured N400 semantic priming effects at baseline in CHR patients ( n = 47) who viewed prime words each followed by a related/unrelated target word at stimulus‐onset asynchronies (SOAs) of 300 or 750 ms. We measured psychosis‐spectrum symptoms using the Structured Interview for Prodromal Symptoms and role and social functioning with the Global Functioning: Role and Social scales, at baseline, 1 ( n = 29) and 2 years ( n = 25). There was a significant interaction between the N400 semantic priming effect at the 300‐ms SOA and time on GF:Role scores, indicating that, contrary to expectations, smaller baseline N400 semantic priming effects were associated with more improvement in role functioning from baseline to Year 1, but baseline N400 priming effects did not predict role functioning at Year 2. N400 priming effects were not significantly associated with different trajectories in psychosis‐spectrum symptoms or social functioning. Thus, CHR patients' N400 semantic priming effects did not predict clinical outcomes over 2 years, suggesting that this ERP measure may have greater value as a state or short‐term prognostic neurophysiological biomarker." @default.
- W4382631946 created "2023-07-01" @default.
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- W4382631946 date "2023-06-29" @default.
- W4382631946 modified "2023-10-17" @default.
- W4382631946 title "N400 event‐related brain potential index of semantic processing and two‐year clinical outcomes in persons at high risk for psychosis: A longitudinal study" @default.
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- W4382631946 doi "https://doi.org/10.1111/ejn.16074" @default.
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