Fitting the psychometric function.

  title={Fitting the psychometric function.},
  author={Bernhard Treutwein and Hans Strasburger},
  journal={Perception & psychophysics},
  volume={61 1},
A constrained generalized maximum likelihood routine for fitting psychometric functions is proposed, which determines optimum values for the complete parameter set--that is, threshold and slope--as well as for guessing and lapsing probability. The constraints are realized by Bayesian prior distributions for each of these parameters. The fit itself results from maximizing the posterior distribution of the parameter values by a multidimensional simplex method. We present results from extensive… CONTINUE READING

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