Barch D M, Carter C S, Perlstein W, Baird J, Cohen J D, Schooler N
Department of Psychiatry, University of Pittsburgh Medical School, PA 15213, USA.
Schizophr Res. 1999 Aug 23;39(1):51-64. doi: 10.1016/s0920-9964(99)00025-0.
Studies using the single trial Stroop task consistently reveal increased reaction time (RT) facilitation effects among schizophrenia patients. One possible mechanism underlying this effect is increased automatic spreading activation in semantic networks. The current study was designed to test this hypothesis. We administered the Stroop task and two semantic priming tasks to the same subjects. Patients showed greater Stroop RT facilitation than controls, no evidence of increased semantic priming at short stimulus onset asynchronies (SOAs), and reduced semantic priming at long SOAs. In addition, abnormal Stroop performance was related to the severity of Disorganization symptoms. These results are inconsistent with the spreading activation hypothesis. Alternative hypotheses regarding the source of Stroop task performance deficits in schizophrenia are discussed.
使用单次试验斯特鲁普任务的研究一致表明，精神分裂症患者的反应时间（RT）促进效应增加。这种效应背后的一种可能机制是语义网络中自动扩散激活的增加。本研究旨在验证这一假设。我们对同一组受试者进行了斯特鲁普任务和两项语义启动任务。患者表现出比对照组更大的斯特鲁普RT促进效应，在短刺激起始异步（SOA）时没有语义启动增加的证据，而在长SOA时语义启动减少。此外，异常的斯特鲁普表现与紊乱症状的严重程度有关。这些结果与扩散激活假设不一致。讨论了关于精神分裂症中斯特鲁普任务表现缺陷来源的替代假设。
