This study evaluated the association of neurocognition and symptoms with measures of social and occupational functioning in the Clinical Antipsychotic Trials of Intervention Effectiveness (CATIE)

Mohamed S, Rosenheck R, Swartz M, Stroup S, Lieberman JA, Keefe RSE. Relationship of cognition and psychopathology to function impairment in schizophrenia.  The American Journal of Psychiatry, 2008; 165(8): 978-987.