T. Shinba et al., Random number generation deficit in schizophrenia characterized by oral vswritten response modes, PERC MOT SK, 91(3), 2000, pp. 1091-1105
To characterize the deficit in random number generation in schizophrenia wi
th respect to control of sensory information processing, the present study
employed a random number generation task using 10 digits (0 to 9) and compa
red two response modes (oral and written) with different amounts of sensory
availability about the previous choices of the subject. Analysis indicated
that the increased availability of previous information in the written res
ponse mode may exacerbate an aspect of the deficit in random number generat
ion in schizophrenia reflecting the disturbance in control of sensory infor
mation processing. The comparison of performance in written and oral respon
se modes may be useful in assessing schizophrenic psychopathology.