Are high-level aftereffects perceptual?

Frontiers in Psychology

Katherine R. Storrs¹ 

关键词: psychophysical methods;    aftereffects;    anchoring effect;    response bias;    contrast effect;    neural adaptation;    adaptation;    psychological;   

DOI  :  10.3389/fpsyg.2015.00157

学科分类：心理学（综合）

来源: Frontiers

【 摘 要 】

Imagine an experiment in which you show someone pictures of a computer-generated face displaying random expressions, ranging from happy, through neutral, to sad. You tell the participant that she must classify each picture as being either “happy” or “sad,” and you note the point on the expression continuum at which she switches from mostly-“happy” classifications to mostly-“sad.” Then, you ask her to repeat the task, but between each picture you have her feel, with her hands but out of sight, the contours of a smiling face mask. You find that her category boundary has shifted: she now classifies more of the pictures as “sad.” This result (reported by Matsumiya, 2013) is an example of an aftereffect, in which adaptation to one input (the mask) has altered responses to subsequent inputs (the images). It is “high-level” in the sense that the adapting and test stimuli have little overlap in their initial sensory encoding (they are presented in separate modalities). There are at least two ways to interpret this finding.

【 授权许可】

CC BY