摘要
Objective:To investigate the neural electrophysiologieal activity underlying Chinese and Eng- lish Stroop tasks for Chinese English bilinguals.Methods:Event-related potentials(ERPs)were recorded in 14 Chinese bilinguals with a moderate command of English when they performed the Stroop task pre- sented in English words and Chinese characters,respectively.Results:In Chinese task version,it was found an increased positivity over bilateral front-polar regions on incongruent trials compared with congru- ent trials,followed by an increased negativity over fronto-central region and an increased positivity over occipital region.While in English task version,only the increased negativity was observed over fronto-cen- tral region,but with reduced amplitude and anterior distribution.Conclusion:This increased negativity was proposed as an index of the resolution processes of conflicting information in the incongruent situa- tion.The increased positivity over occipital region on Chinese incongruent trials may indicate visually rechecking effect for Chinese character.
Objective： To investigate the neural electrophysiologieal activity underlying Chinese and English Stroop tasks for Chinese-English bilinguals. Methods： Event-related potentials （ERPs） were recorded in 14 Chinese bilinguals with a moderate command of English when they performed the Stroop task presented in English words and Chinese characters, respectively. Results： In Chinese task version, it was found an increased positivity over bilateral front-polar regions on incongruent trials compared with congruent trials, followed by an increased negativity over fronto-central region and an increased positivity over occipital region. While in English task version, only the increased negativity was observed over fronto-central region, but with reduced amplitude and anterior distribution. Conclusion： This increased negativity was proposed as an index of the resolution processes of conflicting information in the incongruent situation. The increased positivity over occipital region on Chinese incongruent trials may indicate visually rechecking effect for Chinese character.
