McKeever W F, VanDeventer A D
Cortex. 1977 Sep;13(3):321-6. doi: 10.1016/s0010-9452(77)80043-9.
Levy hypothesized that persons lacking strict left hemispheric dominance for language processing should be impaired in spatial processing ability. This leads to the expectation that left-handers, because they are more often not strictly left hemisphere dominant for language, would, as a group, be impaired in spatial ability relative to right-handers. Evidence regarding this hypothesis has been inconsistent. The present study systematically examined the effects of handedness, sex, and hemispheric language dominance on verbal and spatial ability in 80 right-handed and 71 left-handed university students. Males were found to be superior to females in all handedness-hemispheric language dominance groups on the spatial ability measure. No effects of handedness or hemispheric lanaguage dominance nor interactions of these factors obtained for either verbal or spatial ability measures. It was concluded that the hypothesis of verbal-spatial processing incompatibility within the same hemisphere was not supported.
利维提出假设，认为在语言处理方面缺乏严格左半球优势的人，其空间处理能力会受到损害。由此可以预期，左撇子由于在语言方面更常不是严格的左半球优势，作为一个群体，相对于右撇子而言，其空间能力会受到损害。关于这一假设的证据并不一致。本研究系统地考察了用手习惯、性别和半球语言优势对80名右撇子和71名左撇子大学生的语言和空间能力的影响。在所有用手习惯 - 半球语言优势组中，发现男性在空间能力测试方面优于女性。在用手习惯或半球语言优势方面，无论是语言能力测试还是空间能力测试，均未发现这些因素的影响或它们之间的相互作用。研究得出结论，同一半球内语言 - 空间处理不兼容的假设未得到支持。
