Auditory frequency discriminatior in adult developmental dyslexics

S. J. France; B. S. Rosner; P. C. Hansen; C. Calvin; J. B. Talcott; A. J. Richardson; J. F. Stein

doi:10.3758/BF03195783

Auditory frequency discriminatior in adult developmental dyslexics

S. J. France, B. S. Rosner^*, P. C. Hansen, C. Calvin, J. B. Talcott, A. J. Richardson, J. F. Stein

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Developmental dyslexics reportedly discriminate auditory frequency poorly. A recent study found no such deficit. Unlike its predecessors, however, it employed multiple exposures per trial to the standard stimulus. To investigate whether this affects frequency discrimination in dyslexics, a traditional two-interval same-different paradigm (2I_1A_X) and a variant with six A-stimuli per trial (2I_6A_X) were used here. Frequency varied around 500 Hz; interstimulus interval (ISI) ranged between 0 and 1,000 msec. Under 2I_1A_X, dyslexics always had larger just noticeable differences (JNDs) than did controls. Dyslexic and control JNDs were equal at shorter ISIs under 2I_6A_X, but dyslexics became worse than controls at longer ISIs. Signal detection analysis suggests that both sensory variance and trace variance are larger in dyslexics than in controls.

Original language	English
Pages (from-to)	169-179
Number of pages	11
Journal	Perception and Psychophysics
Volume	64
Issue number	2
DOIs	https://doi.org/10.3758/BF03195783
Publication status	Published - 1 Feb 2002

Keywords

Digit Span
Poor Reader
Dyslexia
Weber Fraction
Frequency Discrimination

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10.3758/BF03195783

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title = "Auditory frequency discriminatior in adult developmental dyslexics",

abstract = "Developmental dyslexics reportedly discriminate auditory frequency poorly. A recent study found no such deficit. Unlike its predecessors, however, it employed multiple exposures per trial to the standard stimulus. To investigate whether this affects frequency discrimination in dyslexics, a traditional two-interval same-different paradigm (2I_1A_X) and a variant with six A-stimuli per trial (2I_6A_X) were used here. Frequency varied around 500 Hz; interstimulus interval (ISI) ranged between 0 and 1,000 msec. Under 2I_1A_X, dyslexics always had larger just noticeable differences (JNDs) than did controls. Dyslexic and control JNDs were equal at shorter ISIs under 2I_6A_X, but dyslexics became worse than controls at longer ISIs. Signal detection analysis suggests that both sensory variance and trace variance are larger in dyslexics than in controls.",

keywords = "Digit Span, Poor Reader, Dyslexia, Weber Fraction, Frequency Discrimination",

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AU - France, S. J.

AU - Rosner, B. S.

AU - Hansen, P. C.

AU - Calvin, C.

AU - Talcott, J. B.

AU - Richardson, A. J.

AU - Stein, J. F.

PY - 2002/2/1

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N2 - Developmental dyslexics reportedly discriminate auditory frequency poorly. A recent study found no such deficit. Unlike its predecessors, however, it employed multiple exposures per trial to the standard stimulus. To investigate whether this affects frequency discrimination in dyslexics, a traditional two-interval same-different paradigm (2I_1A_X) and a variant with six A-stimuli per trial (2I_6A_X) were used here. Frequency varied around 500 Hz; interstimulus interval (ISI) ranged between 0 and 1,000 msec. Under 2I_1A_X, dyslexics always had larger just noticeable differences (JNDs) than did controls. Dyslexic and control JNDs were equal at shorter ISIs under 2I_6A_X, but dyslexics became worse than controls at longer ISIs. Signal detection analysis suggests that both sensory variance and trace variance are larger in dyslexics than in controls.

AB - Developmental dyslexics reportedly discriminate auditory frequency poorly. A recent study found no such deficit. Unlike its predecessors, however, it employed multiple exposures per trial to the standard stimulus. To investigate whether this affects frequency discrimination in dyslexics, a traditional two-interval same-different paradigm (2I_1A_X) and a variant with six A-stimuli per trial (2I_6A_X) were used here. Frequency varied around 500 Hz; interstimulus interval (ISI) ranged between 0 and 1,000 msec. Under 2I_1A_X, dyslexics always had larger just noticeable differences (JNDs) than did controls. Dyslexic and control JNDs were equal at shorter ISIs under 2I_6A_X, but dyslexics became worse than controls at longer ISIs. Signal detection analysis suggests that both sensory variance and trace variance are larger in dyslexics than in controls.

KW - Digit Span

KW - Poor Reader

KW - Dyslexia

KW - Weber Fraction

KW - Frequency Discrimination

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ER -

Auditory frequency discriminatior in adult developmental dyslexics

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Keywords

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