抑郁症中潜在的面部感知偏差机制的计算解释。

IF 4.6 1区 心理学 Q1 Medicine
Fabian A Soto, Rochelle A Stewart, Sanaz Hosseini, Jason Hays, Christopher G Beevers
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引用次数: 4

摘要

在这里,我们采用计算方法来理解抑郁症中面部感知偏见的机制。30名被诊断为重度抑郁症的参与者和30名健康的对照组参与者参加了三项研究,涉及识别面部的身份和情绪。我们使用信号检测理论来确定除决策偏差外,抑郁症中是否存在知觉偏差。我们发现,总的来说,人们对快乐的敏感度较低,对模棱两可的刺激下的快乐和悲伤的敏感度也较低。我们使用高度控制的面部刺激,确保这种不对称在本质上是真正的感知,而不是研究具有固有区别性的表情的结果。我们没有发现抑郁对面部表情和身份之间的知觉互动有系统的影响。我们还发现,在我们的任务中,抑郁症患者和对照组使用的决策策略是不同的,但在某种程度上,这是高度特定于所呈现的刺激集的。我们通过模拟表明,观察到的感知效应,以及文献中发现的其他偏见,可以通过一个计算模型来解释,在这个模型中,编码积极表达的通道被选择性地抑制。(PsycInfo Database Record (c) 2021 APA,版权所有)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A computational account of the mechanisms underlying face perception biases in depression.

A computational account of the mechanisms underlying face perception biases in depression.

Here, we take a computational approach to understand the mechanisms underlying face perception biases in depression. Thirty participants diagnosed with major depressive disorder and 30 healthy control participants took part in three studies involving recognition of identity and emotion in faces. We used signal detection theory to determine whether any perceptual biases exist in depression aside from decisional biases. We found lower sensitivity to happiness in general, and lower sensitivity to both happiness and sadness with ambiguous stimuli. Our use of highly-controlled face stimuli ensures that such asymmetry is truly perceptual in nature, rather than the result of studying expressions with inherently different discriminability. We found no systematic effect of depression on the perceptual interactions between face expression and identity. We also found that decisional strategies used in our task were different for people with depression and controls, but in a way that was highly specific to the stimulus set presented. We show through simulation that the observed perceptual effects, as well as other biases found in the literature, can be explained by a computational model in which channels encoding positive expressions are selectively suppressed. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

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来源期刊
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期刊介绍: The Journal of Abnormal Psychology® publishes articles on basic research and theory in the broad field of abnormal behavior, its determinants, and its correlates. The following general topics fall within its area of major focus: - psychopathology—its etiology, development, symptomatology, and course; - normal processes in abnormal individuals; - pathological or atypical features of the behavior of normal persons; - experimental studies, with human or animal subjects, relating to disordered emotional behavior or pathology; - sociocultural effects on pathological processes, including the influence of gender and ethnicity; and - tests of hypotheses from psychological theories that relate to abnormal behavior.
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