Park Haeme R P, Waldie Karen E
a School of Psychology and Centre for Brain Research , The University of Auckland , Auckland , New Zealand.
Laterality. 2017 Mar;22(2):195-218. doi: 10.1080/1357650X.2016.1154066. Epub 2016 Mar 9.
Atypical lateralization for language has been found in schizophrenia, suggesting that language and thought disorders on the schizophrenia spectrum may be due to left hemispheric dysfunction. However, research with those with non-clinical schizotypy has been inconsistent, with some studies finding reduced or reversed language laterality (particularly with positive schizotypal traits), and others finding typical left hemispheric specialization. The aim of the current study was to use both a behavioural (dual reading-finger tapping) task and an functional magnetic resonance imaging lexical decision task to investigate language laterality in a university sample of high- and low-schizotypal adults. Findings revealed no evidence for atypical lateralization in our sample for both overall schizotypy (measured by the Oxford-Liverpool Inventory of Feelings and Experiences) and positive schizotypy (measured by the Unusual Experiences subscale) groups. Our findings provide further evidence that non-clinical schizotypy is not associated with atypical language laterality.
在精神分裂症中发现了语言的非典型偏侧化，这表明精神分裂症谱系中的语言和思维障碍可能是由于左半球功能障碍所致。然而，对具有非临床分裂型人格特质者的研究结果并不一致，一些研究发现语言偏侧化减弱或反转（特别是具有阳性分裂型人格特质时），而另一些研究则发现典型的左半球特化。本研究的目的是使用行为任务（双重阅读 - 手指敲击）和功能磁共振成像词汇判定任务，来调查高分裂型人格特质和低分裂型人格特质的成年大学生样本中的语言偏侧化情况。研究结果显示，在我们的样本中，无论是总体分裂型人格特质（通过《牛津 - 利物浦情感与体验量表》测量）组还是阳性分裂型人格特质（通过《异常体验》分量表测量）组，均未发现非典型偏侧化的证据。我们的研究结果进一步证明，非临床分裂型人格特质与非典型语言偏侧化无关。
