Bharti Anuj Kumar, Yadav Sandeep Kumar, Jaswal Snehlata
Center for Biologically Inspired System Science, Indian Institute of Technology, Jodhpur, India.
Department of Electrical Engineering, Indian Institute of Technology, Jodhpur, India.
Front Psychol. 2020 Feb 5;11:33. doi: 10.3389/fpsyg.2020.00033. eCollection 2020.
Feature binding is a process that creates an integrated representation of an object. A change detection task with four stimuli is used to study color-shape binding of sequentially presented stimuli. Given the immense importance of locations in feature binding, and noting the confound of location information with simultaneous presentation, we compared simultaneous and sequential presentations when locations remained the same from study to test and when they changed randomly. In Experiment 1, sequential presentation implied showing the stimuli one by one to gradually build up the study display. There were no differences between the two modes of presentation in this experiment, although performance was better with unchanged locations than random locations. Experiment 2 used a sequential presentation when one stimulus vanished as the next was presented. An interaction effect showed that performance was much better with unchanged locations than random locations with simultaneous presentation, whereas locations had no effect in the sequential presentation condition. Three subsequent experiments, with drastically reduced presentation time for the display in the simultaneous presentation condition (Experiment 3), with blank intervals inserted after every stimulus in the sequential presentation condition (Experiment 4), and with a mask given immediately after the study-display presentation (Experiment 5), showed results similar to Experiment 2. Thus, we surmise that locations are a factor only in simultaneous presentation, and not in sequential presentation, and the differences between the two conditions can be attributed to post-perceptual factors within visual working memory.
特征捆绑是一个创建物体整合表征的过程。一项采用四个刺激物的变化检测任务被用于研究相继呈现的刺激物的颜色-形状捆绑。鉴于位置在特征捆绑中极为重要，并且注意到位置信息与同时呈现存在混淆，我们比较了从学习到测试时位置保持不变以及位置随机变化情况下的同时呈现和相继呈现。在实验1中，相继呈现意味着逐个展示刺激物以逐渐构建学习显示。在该实验中，两种呈现模式之间没有差异，尽管位置不变时的表现优于位置随机时的表现。实验2在呈现下一个刺激物时前一个刺激物消失的情况下采用相继呈现。一个交互效应表明，在同时呈现时位置不变时的表现比位置随机时好得多，而在相继呈现条件下位置没有影响。随后的三个实验，在同时呈现条件下大幅缩短显示的呈现时间（实验3），在相继呈现条件下每个刺激物后插入空白间隔（实验4），以及在学习显示呈现后立即给予掩蔽（实验5），结果与实验2相似。因此，我们推测位置只是同时呈现中的一个因素，而不是相继呈现中的因素，并且这两种条件之间的差异可归因于视觉工作记忆中的后感知因素。
