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Childhood cognitive scores among members of the 1946 British birth cohort, analysed by (a) psychotic-like experiences at age 53 years (Psychosis Screening Questionnaire, PSQ); (b) clinically relevant psychotic symptoms at age 36 years (Present State Examination, PSE); and (c) normal v. high general psychiatric morbidity at age 53 years (General Health Questionnaire, GHQ). Scores are mean values, bars indicate standard error.
