A general area theorem for the same-different paradigm.

Full Abstract

According to a well-known theorem in psychophysics (Green & Swets, 1966), the area under the receiver operating characteristic (ROC) for the yes-no paradigm equals the proportion of correct responses of an unbiased observer in the two-interval, two-alternative, forced choice paradigm (2I2AFC). Here, we demonstrate a similar relationship between the ROC area in the two-interval same-different (AX or 2IAX) paradigm, and the proportion correct in the four-interval same-different (4IAX, also known as dual-pair comparison) paradigm. The theorem demonstrated here is general, in the sense that it does not require that the sensory observations have a specific distribution (e.g., Gaussian), or that they be statistically independent.

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Author information

Author/s: Micheyl, Christophe (C); Dai, Huanping (H);

Affiliation: University of Minnesota, Minneapolis, Minnesota, USA. cmicheyl(-atsign-)umn.edu

Grants: R01 DC 05216 (Agency:United States NIDCD)

Journal and publication information

Publication Type: Journal Article; Research Support, N.I.H., Extramural

Journal: Perception & psychophysics (Percept Psychophys), published in United States. (Language: eng)

Reference: 2008-Jul; vol 70 (issue 5) : pp 761-4

Dates: Created 2008/07/10; Completed 2008/08/12;

PMID: 18613624, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Humans
Models, Psychological

Psychophysics - statistics & numerical data
Sensation

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