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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Backward recognition masking as a general type of interference in needed poststimulus processing.

Richard E Pastore1, Jeremy R Gaston, Melody S Berens

  • 1Department of Psychology, Binghamton University, Binghamton, New York 13902-6000, USA. pastore@binghamton.edu

Perception & Psychophysics
|August 23, 2008
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Summary

Auditory backward recognition masking (ABRM) challenges previous theories by showing it affects basic auditory processing, not just sensory memory. This study reveals ABRM’s complexity in pitch and temporal order perception.

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Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Sensory Processing

Background:

  • Auditory backward recognition masking (ABRM) is traditionally linked to sensory storage and processing limitations.
  • Previous research suggested ABRM is invariant for brief, frequency-similar auditory stimuli.

Purpose of the Study:

  • To investigate if ABRM reflects fundamental auditory processing principles beyond sensory memory.
  • To explore ABRM's dependence on target tone duration and stimulus intervals.

Main Methods:

  • ABRM was measured using target tone duration as the primary variable.
  • Stimuli included musical fifths for targets and musical thirds for masker-target intervals.
  • Psychometric functions were analyzed to identify contributing factors.

Main Results:

  • ABRM was demonstrated effectively when measured by target tone duration.
  • Thresholds for ABRM ranged from 22 to 55 msec.
  • Psychometric functions indicated multiple factors influence ABRM.

Conclusions:

  • ABRM is not solely related to short-lived sensory information storage.
  • Findings suggest ABRM involves broader auditory processing mechanisms.
  • Implications for temporal order perception and complex auditory stimuli, like speech, are considered.