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The dynamics of buffered and triggered selection from rapid serial visual presentation (RSVP) streams
Charles J H Ludowici1, Alex O Holcombe2
1School of Psychology, The University of Sydney.
Journal of Experimental Psychology. Human Perception and Performance
|December 10, 2020
Summary
Visual attention can select items presented before a cue in rapid serial visual presentation (RSVP) streams, challenging prior assumptions. This selection occurs from a buffer of stimulus representations, influenced by attention speed and stream competition.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Visual Perception
Background:
- Traditional models posit attentional sampling triggered by cues for selection in rapid serial visual presentation (RSVP).
- Previous theories suggested stimuli presented before a cue are unavailable for selection.
- Limited capacity for processing incoming visual information necessitates selection mechanisms.
Purpose of the Study:
- To investigate an alternative selection mechanism: selection from a buffer of stimulus representations.
- To provide quantitative evidence for the selection of stimuli presented before a cue in RSVP.
- To examine the influence of multiple RSVP streams and attention on precue selection.
Main Methods:
- Development and application of a novel statistical method to analyze stimulus selection.
- Experimental manipulation involving simultaneous RSVP streams with random cueing.
- Varying the number of concurrent RSVP streams to assess its impact on selection.
Main Results:
- Quantitative evidence confirmed that stimuli presented before the cue can be selected.
- Selection of precue stimuli occurred when two RSVP streams were presented.
- Increasing the number of streams diminished precue reports and delayed selection.
Conclusions:
- Stimulus representations in RSVP persist long enough for selection if attention is sufficiently fast.
- Endogenous attention and competition among stimulus representations affect temporal selection speed and variability.
- Fewer streams may facilitate faster selection and buffering due to preemptive endogenous attention.
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