Paquette C, Tosoni C, Lassonde M, Peretz I
Département de Psychologie, Université de Montréal Quebec, Canada.
Brain Lang. 1996 Mar;52(3):474-83. doi: 10.1006/brln.1996.0025.
In order to determine the relation between hemispheric specialization for language and intellectual deficiency, two groups of lower-IQ subjects were compared to normal-IQ controls on word-dichotic listening tasks. Two conditions in which stimuli differed by their level of phonological complexity were used. Normal controls showed the expected right-ear advantage in both conditions. Moreover, they showed a greater magnitude of ear difference on the condition requiring higher-order phonological processing. In the mentally deficient group, almost half the subjects exhibited a left-ear advantage and they showed no difference between the two conditions in terms of the magnitude of ear difference. These results point to the presence of atypical hemispheric specialization in mentally deficient subjects.
为了确定语言半球特化与智力缺陷之间的关系，在词语双耳分听任务中，将两组低智商受试者与正常智商对照组进行了比较。使用了两种刺激在语音复杂程度上有所不同的条件。正常对照组在两种条件下均表现出预期的右耳优势。此外，在需要高阶语音处理的条件下，他们的双耳差异幅度更大。在智力缺陷组中，几乎一半的受试者表现出左耳优势，并且他们在两种条件下的双耳差异幅度没有差异。这些结果表明智力缺陷受试者存在非典型的半球特化。
