视觉注意离散性的实验范式

注意离散性是注意间歇性地采集外界信息的特性。文章综述了视觉注意离散性的4种实验范式:(1)车轮错觉范式,刺激强度大、实验条件少、被试任务量小,较早地证实了视觉注意的离散性;(2)视觉探测范式,同时观察了被试的行为表现与电生理信号,确定了视觉注意离散性与神经振荡的关联;(3)线索靶子范式和视觉搜索范式,通过系统地变化SOA大幅提高了行为数据的时间分辨率,直观地探测到注意离散性调制的行为振荡。

Experimental paradigms for discrete attention in visual domain

The spotlight of attention is intrinsically rhythmic,which discretely sample a single or multiple objects.This phenomenon is called discrete attention.Here we summarized four paradigms used to investigate discrete attention in visual domain.In the wagon-wheel illusion paradigm,motion direction illusion is experienced.This paradigm is adopted to demonstrate the discreteness of attention.In the visual detection paradigm,participants are asked to detect the near-threshold stimuli,which is used to investigate relationship between neural oscillation and discrete attention.In the high time-resolved cue-target paradigm,a target occurs after a varying interval following a peripheral cue;while the target is embedded among distracters in the visual search paradigm.These two paradigms are developed to vividly show behavioral oscillation patterns.