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 bilingua...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.展开更多
This study employed the emotional Stroop experiment from a behavioral research perspective to explore the role of the emotional Stroop effect in identifying depressive disorders among college students and to examine i...This study employed the emotional Stroop experiment from a behavioral research perspective to explore the role of the emotional Stroop effect in identifying depressive disorders among college students and to examine its correlation with the results of the Self-Rating Depression Scale(SDS)and the Patient Health Questionnaire-9(PHQ-9).The results showed that the emotional Stroop effect of depressive words was significantly correlated with the scores of the depression scales,with correlations of r=0.757(p<0.01)for the SDS and r=0.739(p<0.01)for the PHQ-9.These findings confirm the validity of the emotional Stroop effect in identifying depressive disorders among college students,indicating that it serves as an effective supplementary method to depression scale assessments for screening depressive disorders.展开更多
Event-related brain potentials(ERPs)were measured when 24 Chinese subjects performed the earthquake color-matching Stroop task.All of them have experienced the great Sichuan earthquake(5.12),with 12 subjects in each o...Event-related brain potentials(ERPs)were measured when 24 Chinese subjects performed the earthquake color-matching Stroop task.All of them have experienced the great Sichuan earthquake(5.12),with 12 subjects in each of Chengdu city and Chongqing city(different earthquake experiences)groups.The behavioral data showed that the earthquake Stroop task yielded robust the earthquake interference effect as indexed by longer RT for earthquake-related(Related)words than earthquake-unrelated(Unrelated)words only in the Chengdu group.Scalp ERP analysis also revealed the neurophysiological substrate of the interference effect:a greater positivity(P350-450)in Related words as compared to Unrelated words was found between 350 and 450 ms post-stimulus over fronto-central scalp regions in the Chengdu group,while the interference effect was not found in the Chongqing group.The P350-450 might reflect an earthquake experience interference,but also attention enhancing,effect of earthquake-related words.Dipole source analysis of the difference wave(Related-Unrelated)showed that a generator was localized in the parahippocampal gyrus,which was possibly associated with flashbulb memory(personal earthquake experience).The results indicated that different personal earthquake experiences might be critical in engaging the neural mechanisms that underlie the modulation of selective attention.展开更多
文摘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.
文摘This study employed the emotional Stroop experiment from a behavioral research perspective to explore the role of the emotional Stroop effect in identifying depressive disorders among college students and to examine its correlation with the results of the Self-Rating Depression Scale(SDS)and the Patient Health Questionnaire-9(PHQ-9).The results showed that the emotional Stroop effect of depressive words was significantly correlated with the scores of the depression scales,with correlations of r=0.757(p<0.01)for the SDS and r=0.739(p<0.01)for the PHQ-9.These findings confirm the validity of the emotional Stroop effect in identifying depressive disorders among college students,indicating that it serves as an effective supplementary method to depression scale assessments for screening depressive disorders.
基金Supported by the National Natural Science Foundation of China(Grant No.30800293)the Key Project of Philosophy and Social Science of Chinese Ministry of Education(Grant No.08JZD0026)the Southwest University Doctoral Fund
文摘Event-related brain potentials(ERPs)were measured when 24 Chinese subjects performed the earthquake color-matching Stroop task.All of them have experienced the great Sichuan earthquake(5.12),with 12 subjects in each of Chengdu city and Chongqing city(different earthquake experiences)groups.The behavioral data showed that the earthquake Stroop task yielded robust the earthquake interference effect as indexed by longer RT for earthquake-related(Related)words than earthquake-unrelated(Unrelated)words only in the Chengdu group.Scalp ERP analysis also revealed the neurophysiological substrate of the interference effect:a greater positivity(P350-450)in Related words as compared to Unrelated words was found between 350 and 450 ms post-stimulus over fronto-central scalp regions in the Chengdu group,while the interference effect was not found in the Chongqing group.The P350-450 might reflect an earthquake experience interference,but also attention enhancing,effect of earthquake-related words.Dipole source analysis of the difference wave(Related-Unrelated)showed that a generator was localized in the parahippocampal gyrus,which was possibly associated with flashbulb memory(personal earthquake experience).The results indicated that different personal earthquake experiences might be critical in engaging the neural mechanisms that underlie the modulation of selective attention.
