听障儿童认知抑制控制的脑电特点

通过认知抑制控制的Stroop范式运用事件相关电位考察听障儿童和对照组儿童在认知抑制控制方面的行为特点以及脑内时程特点。行为结果显示:(1)两类被试在一致条件下认知抑制控制的正确率显著高于不一致条件,反应时显著快于不一致条件,表现出冲突效应;(2)组间结果显示,听障儿童的认知抑制控制正确率显著低于对照组儿童,反应时上差异不显著。脑电结果显示:(1)不一致条件在N450上的负激活显著高于一致条件,听障儿童比对照组儿童诱发了更负的N450波幅;(2)不一致条件在SP上的正激活显著高于一致条件,两类被试在SP上差异不显著。结果提示听障儿童在认知抑制控制过程中的冲突监测功能存在障碍,这是由于冲突监测过程中注意分配能力受损所致。

An ERP Study on Cognitive Inhibition Control of Deaf Children

This study used cognitive Stroop task to explore the inhibitory control process in deaf children. Behavioral results showed that: (1) both subjects showed that conflict effect with the correct rate of congruent conditions was significantly higher than incongruent conditions, and reaction time was significantly faster than the incongruent conditions; (2) The results between groups showed that the correct rate of deaf children was significantly lower than that of the hearing controls, and there was no significant difference in response time. EEG results showed that: (1) The negative activation of N450 under inconsistent conditions was significantly higher than that under consistent conditions, and deaf children induced more negative N450 waves than hearing controls; (2) The positive activation of the inconsistent conditions on SP was significantly higher than that of the consistent conditions, and there was no significant difference in SP components between deaf children and hearing controls. The results suggested that the conflict monitoring function of deaf children in the process of cognitive inhibition control was impaired, which was caused by the impaired attention allocation ability in the process of conflict monitoring.