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Related Experiment Video

Updated: May 30, 2026

A Two-interval Forced-choice Task for Multisensory Comparisons

A Two-interval Forced-choice Task for Multisensory Comparisons

Published on: November 9, 2018

Psychometric functions for pure-tone frequency discrimination.

Huanping Dai¹, Christophe Micheyl

¹Department of Speech, Language, and Hearing Sciences, University of Arizona, 1131 East 2nd Street, Tucson, Arizona, 85721, USA. hdai@email.arizona.edu

The Journal of the Acoustical Society of America

|July 27, 2011

Summary

This summary is machine-generated.

Auditory frequency discrimination models should assume a linear relationship between sensitivity (d') and frequency difference (Δf). Accounting for attentional lapses reveals this linear link across various sound frequencies and levels.

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Area of Science:

Auditory perception
Psychoacoustics
Signal detection theory

Background:

The psychometric function (PF) describes auditory perception thresholds.
Understanding the form of the PF for frequency discrimination is crucial for auditory models.

Purpose of the Study:

To investigate the relationship between sensitivity (d") and frequency difference (Δf) in pure-tone frequency discrimination.
To assess the impact of attentional lapses on estimating the slope of the psychometric function.

Main Methods:

Measured PFs for pure-tone frequency discrimination across various frequencies (200-8000 Hz) and sound pressure levels (SPLs).
Fitted proportion-correct data using a cumulative-Gaussian function of d', where d' was a power transformation of Δf.
Investigated the influence of attentional lapses by including lapse rate as a free parameter in the model fits.

Main Results:

Without accounting for lapses, PF slopes on log(d')-log(Δf) plots were significantly less than 1, suggesting non-linearity.
Including lapse rate in the fits resulted in PF slopes not significantly different from 1, indicating a linear d'-Δf relationship.
This linear relationship held across tested frequencies and SPLs.

Conclusions:

A linear relationship between d' and Δf is consistent with auditory frequency discrimination data when attentional lapses are considered.
Spectral and temporal models of auditory frequency discrimination should incorporate this linear relationship across a broad range of acoustic parameters.