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Related Experiment Videos

Loudness adaptation: fact or artifact?

Keith S Jones1, Ernest M Weiler, Joel S Warm

  • 1Department of Psychology, Kansas State University, USA. keith.s.jones@ttu.edu

The Journal of General Psychology
|December 16, 2003
PubMed
Summary
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The Ipsilateral Comparison Paradigm (ICP) accurately measures loudness adaptation. This study found that contrast effects do not confound the ICP, validating its use in audiology research.

Area of Science:

  • Auditory perception
  • Psychoacoustics
  • Audiology

Background:

  • The Ipsilateral Comparison Paradigm (ICP) is used to measure loudness adaptation.
  • Concerns exist that contrast effects may confound ICP results.
  • Contrast effects involve perceived changes in stimulus intensity due to preceding stimuli.

Purpose of the Study:

  • To test the hypothesis that contrast effects confound the Ipsilateral Comparison Paradigm (ICP).
  • To determine if the ICP is a valid measure of loudness adaptation.
  • To investigate the impact of bidirectional referents on loudness perception.

Main Methods:

  • Utilized bidirectional referents where base tones (50 or 70 dB) alternated with more or less intense referents.
  • A 3.5-minute listening period was employed.

Related Experiment Videos

  • Measured loudness changes over time in base tones and referents.

    • Main Results:

    • Contrary to the contrast hypothesis, base-tone loudness significantly declined over time.
    • Referent loudness also significantly declined over time.
    • Observed loudness declines were not nullified by opposing contrast effects.

    Conclusions:

    • The Ipsilateral Comparison Paradigm (ICP) is a valid measure, free from confounding contrast effects.
    • Broad-based loudness adaptation can be reliably assessed using the ICP.
    • The study supports the ICP's utility in audiological research and auditory perception studies.