Moritz Steffen, Wendt Mike
University Medical Center Hamburg-Eppendorf, Department of Psychiatry and Psychotherapy, Clinical Neuropsychology Unit, Hamburg, Germany.
J Int Neuropsychol Soc. 2006 Jul;12(4):566-9. doi: 10.1017/s1355617706060577.
Research conducted with the Rey-figure task has suggested that patients with obsessive-compulsive disorder (OCD) process local aspects of a complex stimulus more efficiently than the overall gestalt. The aim of the present study was to investigate if this "local bias" is established already during early stimulus encoding or occurs only during later processing, once a percept has been formed (e.g., memory retrieval). To this end, responding to local and global targets of hierarchical letters (e.g., an "E" composed out of small "T"s) was assessed in 30 OCD patients and 28 healthy controls. OCD patients and controls performed comparably on all parameters. These results lend no support to the notion of an early perceptual bias towards local elements in OCD patients. It remains to be tested whether a bias towards local features is confined to situations where local and global features compete for selection.
对雷氏图形任务的研究表明，强迫症（OCD）患者处理复杂刺激的局部特征比整体格式塔更有效。本研究的目的是调查这种“局部偏向”是在早期刺激编码时就已形成，还是仅在形成知觉后（例如记忆检索）的后期处理过程中才出现。为此，对30名强迫症患者和28名健康对照者进行了评估，以了解他们对分层字母的局部和全局目标（例如由小“T”组成的“E”）的反应。强迫症患者和对照组在所有参数上的表现相当。这些结果不支持强迫症患者对局部元素存在早期知觉偏向的观点。局部特征偏向是否仅限于局部和全局特征竞争选择的情况，仍有待检验。
