Soares C
Brain Lang. 1984 Sep;23(1):86-96. doi: 10.1016/0093-934x(84)90008-7.
Previous visual and auditory lateralization studies have demonstrated that the languages of bilinguals are lateralized to the left hemisphere to the same extent as in monolingual controls (C. Soares & F. Grosjean, 1981, Perception and Psychophysics, 29, 599-604; C. Soares, 1982, Neuropsychologia, 20, 653-659). The present study tested the same group of Portuguese-English bilinguals and a group of English-speaking monolinguals on a series of concurrent activity, or time-sharing, tasks. Greater levels of disruption in finger tapping with the right hand than with the left hand occurred during the performance of those tasks which required overt speech production, and this for both bilinguals and monolinguals. As in the previous studies, there were no lateralization differences across the bilinguals' two languages or between bilinguals and monolinguals. Thus, further evidence for equal levels of left-hemisphere dominance for language in bilinguals and monolinguals was provided by the use of the concurrent activities paradigm.
以往的视觉和听觉偏侧化研究表明，双语者的两种语言在左半球的偏侧化程度与单语对照组相同（C. 索阿雷斯和F. 格罗斯让，1981年，《知觉与心理物理学》，第29卷，第599 - 604页；C. 索阿雷斯，1982年，《神经心理学》，第20卷，第653 - 659页）。本研究对同一组葡萄牙语 - 英语双语者和一组说英语的单语者进行了一系列同时进行的活动或时间共享任务测试。在那些需要出声说话的任务执行过程中，右手手指敲击的干扰程度比左手更大，双语者和单语者都是如此。与之前的研究一样，双语者的两种语言之间以及双语者和单语者之间没有偏侧化差异。因此，通过使用同时进行活动范式，为双语者和单语者在语言方面左半球优势程度相同提供了进一步的证据。
