Abstract
It is well known that the perceived duration for a given time period decreases with the reduction of the number of perceived events. We examined whether target detection failures in viewing Rapid Serial Visual Presentation (RSVP) sequence, caused by attentional blink, affect this reduction of perceived duration. In two experiments, trials consisted of displays of two series of RSVP sequences; in the first sequence (the comparison), two, one, or no numerals were presented as targets embedded within the string of letters, while in the second sequence (the standard), only alphabetic letters were presented. In each trial, participants judged whether the duration of the comparison is perceived as longer than that of the standard (Experiment 1), or whether the number of frames in the comparison is perceived as more than that in the standard (Experiment 2). Results showed that perceived duration was inflated with target detection, but not with the increment of presented frames although number of perceived frames was inflated with both target detection and increment of presented frames. These results suggest that perceived duration in viewing RSVP sequences is determined by the cognitive load necessary to accomplish target detection rather than by the number of perceived frames.
Highlights
It is well known that the perceived duration for a given time period decreases with the reduction of the number of perceived events
The present study considers the effects of the perceived numbers of events and other factors on perceived duration in observers experiencing the Rapid Serial Visual Presentation (RSVP) display in which multiple visual stimuli are presented in rapid succession
The number of perceived frames for the Notarget condition was less than those for the One-target and Two-target conditions with no error. These results indicate that perceived number of frames, as well as perceived temporal duration, varies with the required cognitive load necessary to process targets in viewing RSVP sequences
Summary
It is well known that the perceived duration for a given time period decreases with the reduction of the number of perceived events. The episodic simultaneous type/serial token model (Wyble et al, 2009, 2011) proposes that targets presented separately are stored in episodically distinct working memory representations and that the AB reflects the suppression of attention which provides this separation; an uninterrupted sequence of targets can be encoded, but following a gap in the sequence, attention is briefly switched off to divide the encoding process into two sequential episodes. Their results showed that the perceived duration was reduced when the AB occurs They concluded that the number of subjectively perceived target stimuli (not the number of objectively presented targets) determines the subjective duration of the entire RSVP sequence. They claimed that the attentional selection (or spontaneous fluctuations of vigilance), which is related to the number of perceived targets, prolonged perceived duration for the RSVP sequence
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