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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Top-Down Processes Override Bottom-Up Interference in the Flanker Task.

Rotem Avital-Cohen1, Yehoshua Tsal2

  • 1School of Psychological Sciences, Tel Aviv University rotemav1@post.tau.ac.il.

Psychological Science
|March 20, 2016
PubMed
Summary
This summary is machine-generated.

Distractor interference in the flanker task depends on whether distractors are perceived as letters or digits. This suggests top-down processing applies to ignored stimuli, challenging existing attention theories.

Keywords:
cognitive controlflanker taskselective attentiontop-down effectsvisual attentionvisual perception

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Attention Studies

Background:

  • Distractor interference in flanker tasks is often considered involuntary.
  • This implies distractors do not undergo independent top-down processing.
  • This study investigates the processing of peripheral distractors.

Purpose of the Study:

  • To test if distractors in a flanker task are subject to independent top-down processing.
  • To examine how expectations about distractor category influence interference.
  • To question the assumed differences between target and distractor processing.

Main Methods:

  • A modified flanker task using ambiguous letter/digit distractors (S/5, O/0).
  • Participants responded to letter targets (S, O).
  • Distractor interference was measured based on perceived distractor category (letter vs. digit).

Main Results:

  • Distractor interference varied based on participants' expectations of distractor category.
  • An 'O-0' distractor interfered with 'S' targets only when perceived as a letter.
  • This indicates top-down processing was applied to distractors independently of targets.

Conclusions:

  • Peripheral distractors can undergo significant top-down processing.
  • This challenges the notion that distractors are merely passive by-products of attention.
  • Findings raise questions about the selectivity and depth of attentional filtering.