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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
Published on: August 29, 2018
Intertrial target-feature changes do not lead to more distraction by singletons: target uncertainty does.
1Department of Psychology, Tel Aviv University, Ramat Aviv, POB 39040, Tel Aviv 69978, Israel. domi@freud.tau.ac.il
Vision Research
|April 9, 2008
Summary
Advance knowledge of target features guides attention in visual search, reducing distraction from irrelevant singletons. This contrasts with theories suggesting only stimulus-driven factors influence search, clarifying the role of inter-trial priming.
Area of Science:
- Cognitive Psychology
- Visual Perception
- Attention Research
Background:
- Singleton search is significantly disrupted by irrelevant distractors when target features vary unpredictably (mixed-singleton search).
- Advance knowledge of target features appears to guide attention, reducing interference in fixed-singleton search.
- Prior research proposed inter-trial priming effects as an alternative explanation for reduced distractor interference.
Purpose of the Study:
- To investigate the discrepancy in findings regarding inter-trial priming effects on singleton search.
- To determine whether task design (blocked vs. random distractor presentation) influences the interaction between inter-trial priming and distractor interference.
- To re-evaluate the role of pre-knowledge in guiding attention during visual search.
Main Methods:
- Comparison of experimental designs involving blocked distractor presence versus randomly mixed distractor conditions.
- Analysis of distractor interference modulation based on target feature repetition or switching across trials.
- Examination of the interaction between task demands and inter-trial priming effects.
Main Results:
- Differences in experimental design, specifically blocked versus random distractor presentation, account for previous discrepancies in inter-trial priming findings.
- Task demands associated with blocked conditions, not distractor presence itself, interact with inter-trial priming.
- Evidence suggests that pre-knowledge of target features can guide attention, challenging purely stimulus-driven accounts of singleton search.
Conclusions:
- Singleton search is not exclusively driven by stimulus-based factors; pre-knowledge plays a crucial role in guiding attention.
- The interaction between task demands and inter-trial priming is critical for understanding distractor interference.
- The findings challenge the ambiguity hypothesis of inter-trial priming, suggesting competition for attentional selection is not the sole driver.
