A change detection task presents a study display and a test display. Our aim in this research is to explore the factors – whether distinct or the same – which operate in the binding of simultaneously and sequentially presented stimuli.įor testing binding in laboratory environments, a change detection task is often used. Presumably, feature binding helps us differentiate objects not only when they are present together at the same time in our experience, but also when they are experienced at different times, say in a sequence. Objects in the real world differ in space as well as time. Not only does it allow the separation of figure and ground, but also the differentiation of one object from another. Binding is a necessary process for accurate perception of the world. 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.įeature binding is the process by which different characteristics, such as, orientation, size, shape, color, and location, are integrated to create an object. 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. 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. Experiment 2 used a sequential presentation when one stimulus vanished as the next was presented. There were no differences between the two modes of presentation in this experiment, although performance was better with unchanged locations than random locations.
In Experiment 1, sequential presentation implied showing the stimuli one by one to gradually build up the study display. 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. A change detection task with four stimuli is used to study color-shape binding of sequentially presented stimuli. Feature binding is a process that creates an integrated representation of an object.
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