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Visual PsychophysicsFrom Laboratory to Theory$
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Zhong-Lin Lu and Barbara Dosher

Print publication date: 2013

Print ISBN-13: 9780262019453

Published to MIT Press Scholarship Online: May 2014

DOI: 10.7551/mitpress/9780262019453.001.0001

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Adaptive Psychophysical Procedures

Adaptive Psychophysical Procedures

(p.351) 11 Adaptive Psychophysical Procedures
Visual Psychophysics

Zhong-Lin Lu

Barbara Dosher

The MIT Press

Adaptive procedures are developed to reduce the burden of data collection in psychophysics by creating more efficient experimental test designs and methods of estimating either statistics or parameters. In some cases, these adaptive procedures may reduce the amount of testing by as much as 80% to 90%. This chapter begins with a description of classical staircase procedures for estimating the threshold and/or slope of the psychometric function, followed by a description of modern Bayesian adaptive methods for optimizing psychophysical tests. We introduce applications of Bayesian adaptive procedures for the estimation of psychophysically measured functions and surfaces. The bias, precision and efficiency of estimates is considered. Each method is accompanied by an illustrative example and sample results and a discussion of the practical requirements of the procedure.

Keywords:   Adaptive testing, Bias, Precision, Efficiency, Adaptive threshold estimation, Staircase procedures, Bayesian adaptive methods, Psi, Quest, Quick methods

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