Webster W G, Thurber A D
Cortex. 1978 Dec;14(4):474-84. doi: 10.1016/s0010-9452(78)80023-9.
The dichhaptic stimulation procedures developed by Witelson (1974) for the study of brain lateralization in children were modified and extended for use with adults. Consistent with findings in children, an overall left hand advantage was found under conditions of simultaneous or dichhaptic stimulation, although it was not found under conditions of monohaptic stimulation. The major purpose of the study was to determine whether in adults hand differences (assumed to reflect hemisphere utilization) could be influenced by the use of differential problem-solving strategies. Half the Ss were instructed to approach the haptic learning and recognition problems in a "sequential" or "analytic" manner, and half to approach them in a "holistic" or "Gestalt" manner. The results indicated that the degree of left hand superiority was indeed influenced by this manipulation, although it is to be noted that the actual basis of the effect is unclear. The results were consistent with the idea that brain lateralization must be defined, not strictly by tasks, but by strategies used by subjects to perform the tasks used to detect and study that lateralization. It is suggested that this immensely complicates the issue of interpreting the origin and basis of individual and group differences in laterality effects.
威特elson（1974年）为研究儿童大脑偏侧化而开发的双手触觉刺激程序经过修改和扩展后用于成年人。与儿童的研究结果一致，在同时或双手触觉刺激条件下发现了总体上左手占优势的情况，尽管在单手触觉刺激条件下未发现这种情况。该研究的主要目的是确定在成年人中，手部差异（假定反映半球利用情况）是否会受到不同问题解决策略的使用的影响。一半的被试被指示以“顺序”或“分析”的方式处理触觉学习和识别问题，另一半被试则以“整体”或“格式塔”的方式处理这些问题。结果表明，左手优势程度确实受到这种操作的影响，不过需要注意的是，这种效应的实际基础尚不清楚。这些结果与以下观点一致，即大脑偏侧化的定义不能严格依据任务，而应依据被试执行用于检测和研究该偏侧化的任务时所采用的策略。有人认为，这极大地复杂化了解释个体和群体在偏侧化效应方面差异的起源和基础这一问题。
