Journal of Mathematical Psychology volume 50, issue 4, P369-389 2006 DOI: 10.1016/j.jmp.2005.12.005 View full text
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Janne V. Kujala, Tuomas J. Lukka

Abstract: We propose a new psychometric model for two-dimensional stimuli, such as color differences, based on parameterizing the threshold of a one-dimensional psychometric function as an ellipse. The C Bayesian adaptive estimation method applied to this model yields trials that vary in multiple stimulus dimensions simultaneously. Simulations indicate that this new procedure can be much more efficient than the more conventional procedure of estimating the psychometric function on one-dimensional lines independently, r…

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