Schwartz S, Kirsner K
Brain Cogn. 1984 Jan;3(1):57-70. doi: 10.1016/0278-2626(84)90007-1.
A large and often contradictory literature purports to demonstrate different patterns--or at least different degrees--of hemispheric specialization across various groups of people. Schizophrenics, dyslexics, stutterers, musicians, Orientals, Jews, and many other groups have been alleged to display idiosyncratic laterality patterns. An examination of this literature reveals three important problems. First the groups concerned are rarely homogeneous. This makes it difficult to know which group characteristics, if any, are responsible for the observed differences. Second, most behavioral laterality indices are of low reliability making group differences highly unstable. Third, the validity of many behavioral laterality indices has not been substantiated. Because of these problems, it is concluded that caution should be exercised in using and interpreting laterality measures to make between-group comparisons. For now at least, group differences in laterality cannot be inferred.
大量且往往相互矛盾的文献旨在证明不同人群中半球特化的不同模式——或者至少是不同程度。精神分裂症患者、诵读困难者、口吃者、音乐家、东方人、犹太人以及许多其他群体据称都表现出独特的偏侧性模式。对这些文献的审视揭示了三个重要问题。首先，相关群体很少是同质的。这使得很难确定是哪些群体特征（如果有的话）导致了观察到的差异。其次，大多数行为偏侧性指标的可靠性较低，使得群体差异非常不稳定。第三，许多行为偏侧性指标的有效性尚未得到证实。由于这些问题，得出的结论是，在使用和解释偏侧性测量进行组间比较时应谨慎。至少目前，不能推断出偏侧性的群体差异。
