a School of Psychology , University of Sussex.
Cogn Neurosci. 2013;4(2):66-72. doi: 10.1080/17588928.2012.751908. Epub 2013 Jan 15.
Healthy individuals with high as compared to low levels of schizotypal personality traits make more first saccades to the left side of faces, suggesting increased right hemisphere (RH) dominance for face processing. Patients with schizophrenia, however, show attenuated or reversed RH dominance for face processing. It is unclear whether the increased RH dominance found in high schizotypes is specific to face processing or whether it is also observable for other stimuli matched in terms of low-level visual properties. We measured gaze to faces and symmetrical fractal patterns and found higher Magical Ideation (MI) is associated with an increased left-side bias for initial saccade landing points and dwell times when free-viewing faces. These laterality biases were unaffected by facial emotion. Schizotypy scores were not related to laterality biases when viewing fractals. Our results provide further evidence that high schizotypy is associated with an increase in RH dominance for face processing.
具有高精神分裂型人格特质的健康个体相对于低水平的个体，在观看人脸时更容易将第一眼看向左侧，这表明右半球（RH）在面孔处理中占据主导地位。然而，精神分裂症患者的面孔处理中 RH 优势减弱或反转。目前尚不清楚高精神分裂型个体中发现的增强的 RH 优势是否特定于面孔处理，或者对于在低水平视觉特性方面相匹配的其他刺激是否也可以观察到。我们测量了注视人脸和对称分形图案的情况，发现当自由观看人脸时，更高的神奇思维（MI）与初始扫视着陆点和注视时间的左侧偏差有关。这些偏侧性偏差不受面部情绪的影响。观看分形时，精神分裂型评分与偏侧性偏差无关。我们的研究结果进一步表明，高精神分裂型与面孔处理中 RH 优势的增加有关。
