Morrens M, Hulstijn W, Matton C, Madani Y, van Bouwel L, Peuskens J, Sabbe B G C
Collaborative Antwerp Psychiatric Research Institute, Antwerp, Belgium.
Cogn Neuropsychiatry. 2008 Nov;13(6):457-71. doi: 10.1080/13546800802439312.
Psychomotor slowing is an intrinsic feature of schizophrenia that is poorly delineated from generally reduced processing speed. Although the Symbol Digit Substitution Test (SDST) is widely used to assess psychomotor speed, the task also taps several higher-order cognitive processes. Recording motor performance on copying tasks using a digitising tablet allows a more precise measurement of psychomotor speed.
A group of 75 schizophrenic inpatients were compared to 26 healthy controls in their performance on the SDST and two copying tasks.
Factor analyses showed that the copying tasks were found to capture both a cognitively loaded factor and the motor component of psychomotor slowing better, which latter aspect is not properly assessed by the SDST.
In schizophrenia psychomotor slowing seems to exist alongside reduced processing speed.
精神运动迟缓是精神分裂症的一个内在特征，与普遍降低的处理速度难以区分。尽管符号数字替换测验（SDST）被广泛用于评估精神运动速度，但该任务也涉及多个高阶认知过程。使用数位板记录复制任务中的运动表现，可以更精确地测量精神运动速度。
将一组75名精神分裂症住院患者与26名健康对照者在SDST和两项复制任务中的表现进行比较。
因素分析表明，复制任务能更好地捕捉认知负荷因素和精神运动迟缓的运动成分，而SDST无法恰当评估后者。
在精神分裂症中，精神运动迟缓似乎与处理速度降低并存。
