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Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.

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Related Experiment Video

Updated: Jun 21, 2026

A Dual Task Procedure Combined with Rapid Serial Visual Presentation to Test Attentional Blink for Nontargets
08:45

A Dual Task Procedure Combined with Rapid Serial Visual Presentation to Test Attentional Blink for Nontargets

Published on: December 5, 2014

When do additional distractors reduce the attentional blink?

Jun-ichiro Kawahara1

  • 1National Institute of Advanced Industrial Science and Technology, Central 6, 1-1-1 Higashi, Tsukuba 305-8566, Japan. jun.kawahara@aist.go.jp

Journal of Experimental Psychology. Human Perception and Performance
|August 6, 2009
PubMed
Summary

Distractors can alter the attentional blink (AB), a deficit in perceiving a second target. This study found distractors increase AB with spatial uncertainty but decrease it under optimal conditions, suggesting resonance or attentional mechanisms.

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Last Updated: Jun 21, 2026

A Dual Task Procedure Combined with Rapid Serial Visual Presentation to Test Attentional Blink for Nontargets
08:45

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Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions

Published on: July 16, 2015

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The attentional blink (AB) is a deficit in perceiving a second target within a rapid serial visual presentation (RSVP) stream when the intertarget lag is short.
  • Concurrent stimuli can modulate the AB, with prior research showing conflicting effects of distractors (increased vs. decreased AB).

Purpose of the Study:

  • To investigate the boundary conditions influencing whether distractors exaggerate or reduce the attentional blink.
  • To explore the underlying mechanisms of distractor effects on the AB by manipulating spatial configuration, timing, and distractor type.

Main Methods:

  • Manipulated spatial uncertainty, presentation timing, and distractor types within an RSVP stream.
  • Presented concurrent stimuli with target items to assess their impact on the attentional blink magnitude.

Main Results:

  • Increased attentional blink magnitude when spatial uncertainty of target locations was present, irrespective of distractor type.
  • Attentional blink reduction observed with optimal distractor presentation, which diminished when the second target was suprathreshold.
  • Distractor effects on AB varied based on spatial configuration and presentation parameters.

Conclusions:

  • Spatial uncertainty appears to exacerbate the attentional blink deficit.
  • Optimal distractor presentation may reduce the attentional blink, potentially through stochastic resonance or center-surround attentional mechanisms.
  • The findings highlight the complex interplay between distractors and attentional processes in visual perception.