Sungshin Women's University, Department of Psychology, Seoul, Republic of Korea.
Sungshin Women's University, Department of Psychology, Seoul, Republic of Korea.
Biol Psychol. 2014 Feb;96:158-65. doi: 10.1016/j.biopsycho.2013.12.015. Epub 2014 Jan 4.
We examined local-global visual processing in college students with schizotypal traits using event-related potentials (ERPs). Local-global processing was assessed using a divided-attention task, in which large numbers (global level) composed of small numbers (local level) were presented. The control group had faster response time (RT) and more accurate responses to global-level than to local-level stimuli, whereas RT and accuracy did not differ between levels in the schizotypal-trait group. N150 amplitudes for local stimuli were larger than those for global stimuli in the schizotypal-trait group, whereas N150 amplitudes did not differ between levels in the control group. P300 amplitudes for local stimuli were larger relative to global stimuli in the control group, whereas P300 amplitudes did not differ between levels in the schizotypal-trait group. These results indicate that the global precedence effect was reduced in the schizotypal-trait group, possibly because of local-biased visual processing or difficulty in global processing.
我们使用事件相关电位（ERP）技术研究了具有分裂型特质的大学生的局部-整体视觉加工。使用分散注意任务评估局部-整体加工，其中大量（整体水平）由小数量（局部水平）组成。对照组对整体水平刺激的反应时间（RT）更快，反应更准确，而分裂型特质组的 RT 和准确性在不同水平之间没有差异。分裂型特质组的局部刺激的 N150 振幅大于整体刺激，而对照组的 N150 振幅在不同水平之间没有差异。对照组的局部刺激的 P300 振幅相对于整体刺激更大，而分裂型特质组的 P300 振幅在不同水平之间没有差异。这些结果表明，整体优先效应在分裂型特质组中减弱，可能是由于局部偏向的视觉加工或全局处理困难。
