The Psychophysics Psyber Lab




New techniques for reducing the effects of observer inconsistency in psychoacoustic experiments

Judi Lapsley Miller

August 2000
Poster presentation at the Acoustical Society of America Conference
JASA, 107 (5) 2914(A).


One of the biggest problems still facing experimental psychophysics is observer inconsistency. Observer inconsistency degrades performance, hampering comparisons with other observers and theoretical predictions. By repeating an experiment multiple times, using the same stimuli, observer inconsistency can be reduced and asymptotic errorless performance estimated by using group operating characteristic (GOC) analysis and function of replications combined estimation (FORCE) analysis, respectively. These new techniques are described and illustrated with results from various psychoacoustic experiments, showing that humans are sometimes capable of performing as well as an ideal observer once observer inconsistency is reduced.

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Last updated 08 Nov 2009 04:37 PM

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