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急性应激如何影响工作记忆还不清楚。采用电影片断诱发被试的急性应激或中性状态后,让其完成数字N-back任务并同时记录脑电。结果发现,低负荷工作记忆诱发的P3显著大于高负荷工作记忆;在0-back任务中,急性应激组诱发的P3显著大于控制组;而在2-back任务中,这种差异不显著。这些结果表明急性应激对工作记忆的影响受工作记忆负荷调节,支持了双竞争理论模型。
How acute stress affects working memory is unclear. After the film was used to induce acute stress or neutrality, the subjects completed the digital N-back task and recorded the EEG simultaneously. The results showed that the working-memory-induced P3 was significantly higher than that of the high-load working memory. In the 0-back task, the P3 induced by the acute stress group was significantly greater than that of the control group. However, in the 2-back task, this difference was not significant. These results indicate that the impact of acute stress on working memory is regulated by working memory load and supports the dual competitive theoretical model.