AbstractThis study assessed premorbid functioning in 40 male, Caucasian schizophrenics, on the abbreviated Phillips Premorbid Adjustment Scale. Subjects with poorer premorbid adjustment tended to be process rather than reactive (p<.01), early in age of onset (p<.01), and neurologically impaired (p<.01). Neurological impairment as a predisposing factor in early social incompetence was suggested after it was found that the subset of process vs. reactive, age of onset, and neurological impairment accounted for 46% of the variance in Phillips scores.