Vrtunski P B, Simpson D M, Weiss K M, Davis G C
Psychiatry Res. 1986 Jul;18(3):275-84. doi: 10.1016/0165-1781(86)90114-9.
Response time and fine motor control during a classification task were examined in schizophrenics and nonschizophrenics. The task involved decisions about either the sensory characteristics of auditory and visual stimuli or the referential meanings of spoken words and viewed pictures. Nonschizophrenics responded more quickly and exhibited a smoother and faster motor response on all tasks. Response time and motor control were influenced by stimulus modality and the complexity of the classification task in both groups. In the analysis of motor control, the schizophrenics differed from the nonschizophrenics in exhibiting a pattern suggestive of a specific difficulty with decisions involving referential meaning. The observed motor control dysfunction in schizophrenics is a psychomotor deficit similar to previously reported abnormalities in smooth pursuit eye movement. Further, the interaction of group and task variables in the motor response suggests that decisions about the abstract referential meaning of words and pictures produce greater cognitive loads in schizophrenics than in nonschizophrenics.
在一项分类任务中，对精神分裂症患者和非精神分裂症患者的反应时间和精细运动控制进行了检查。该任务涉及对听觉和视觉刺激的感官特征或口语单词和所观看图片的指代意义做出决策。非精神分裂症患者在所有任务上反应更快，并且表现出更平稳、更快的运动反应。两组的反应时间和运动控制都受到刺激方式和分类任务复杂性的影响。在运动控制分析中，精神分裂症患者与非精神分裂症患者的不同之处在于，他们表现出一种模式，表明在涉及指代意义的决策方面存在特定困难。在精神分裂症患者中观察到的运动控制功能障碍是一种精神运动缺陷，类似于先前报道的平稳跟踪眼球运动异常。此外，运动反应中组和任务变量的相互作用表明，对单词和图片的抽象指代意义的决策在精神分裂症患者中比在非精神分裂症患者中产生更大的认知负荷。
