An adaptive psychometric procedure that places each trial at the current most probable Bayesian estimate of threshold is described. The procedure takes advantage of the common finding that the human psychometric function is invariant in form when expressed as a function of log intensity. The procedure is simple, fast, and efficient, and may be easily implemented on any computer.
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The QUEST procedure was developed at the Kenneth Craik Laboratory of Cambridge University. A.B.W. was supported by an NIH postdoctoral fellowship, F32 EY05219. D.G.P. was supported by a British Ministry of Defence grant, “Spatial noise spectra and target detection/recognition,” to F. W. Campbell.
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Watson, A.B., Pelli, D.G. Quest: A Bayesian adaptive psychometric method. Perception & Psychophysics 33, 113–120 (1983). https://doi.org/10.3758/BF03202828
- Psychometric Function
- Final Estimate
- Acoustical Society ofAmerica
- Prior Density
- Failure Function