In this study, 21 adolescents with schizophrenia were compared with 27 "healthy age- and sex-matched" (p. 118) normal comparison subjects. The schizophrenia group had a mean full-scale IQ of 77 (range=48–120), while the normal group had a mean full-scale IQ of 121 (range=97–141). Therefore, "diagnostic status" is confounded with "level of intellectual functioning." The neurological abnormalities found in the adolescents with schizophrenia may have reflected poor intellectual functioning, which may or may not have been independent of their diagnosis of early-onset schizophrenia. Furthermore, the schizophrenia subjects "were examined after at least 1 week with no medication," and the examiners were not blind to patient diagnosis "because of active psychotic symptoms in the patients" (p. 119). Consequently, there may have been medication withdrawal effects on neurological test performance, and active psychotic symptoms may have interfered with the subjects’ ability to attend to and follow the examiner’s instructions. The statement that examiners could not be blind to diagnostic status because of active psychotic symptoms in the adolescents with schizophrenia whose medication had been withdrawn underlines the problem of conducting a neurological assessment under these conditions.