Psychometric schizotypy and motor performance.
Motor abnormalities have long been a focus in discussions of schizophrenia. The present study used a newly developed line drawing task to examine fine motor performance and psychometrically assessed schizotypy in a large, randomly ascertained sample of young adults (N = 120) with no history of psychosis. Poor motor performance on the line drawing task, indexed by root-mean-square error (RMS), was significantly related to 4 separate psychometric measures of schizotypy in the overall sample. The psychometric schizotypy-RMS association remained significant for 2 of the schizotypy measures even when the effects of intellectual functioning, mental state factors, and sustained attention were statistically controlled in a regression analysis. The status of the line drawing index as a schizophrenia liability measure is discussed.
Lenzenweger
Mark F
MF
Department of Psychology, Harvard University, Cambridge, Massachusetts 02138, USA. mlenzen@binghamton.edu
Maher
Brendan A
BA
D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D005260:Female; D006801:Humans; D008297:Male; D010468:Perceptual Disorders / Q000523:psychology; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D011597:Psychomotor Performance / Q000502:physiology*; D012044:Regression Analysis; D012563:Schizophrenia, Paranoid / Q000523:psychology; D012565:Schizophrenic Psychology; D012569:Schizotypal Personality Disorder / Q000503:physiopathology* / Q000523:psychology*