临床抑郁症患者的注意偏倚特征

Characteristics of Attentional Bias in Clinically Depressed Patients

目的:探讨抑郁症患者是否存在注意偏倚,并分析其注意偏倚的时程特征。方法:采用点探测任务,要求受试尽快对探测点的位置进行判断。采用重复测量方差分析,比较抑郁症患者和对照组在不同条件(不同的情绪图片配对、不同的图片呈现时间)下,对探测点作出反应的平均反应时差异。结果:抑郁症患者的平均反应时显著长于对照组;当图片呈现时间为500ms时,抑郁组对负性图片的脱离指数显著大于控制组的脱离指数。结论:抑郁症患者在500ms时对负性图片存在注意脱离困难,而在100ms时则不存在这种注意偏倚特征。

Objective： To investigate whether clinically depressed patients show attentional bias and the time characteristics of their attentional bias. Methods： A probe detection task, was used to compare the response latencies showed by clinically depressed patients and control group under the probes replacing the picture stimulus in different conditions. Results： The average response latencies showed by clinically depressed patients were longer than those showed by control participants. When the picture-pairs were displayed for 500ms, the depressed group had higher disengaging scores for the negative stimulus compared with the control group. Conclusion： The clinically depressed patients have difficulties in disengaging attention from negative information at 500ms but not at 100ms.