>Psychtoolbox>Psychometric

epsilon = FindEpsWeibTAFC(pCorrect,beta)

Compute the epsilon corresponding to a particular
percent correct. Mainly used with quest.

Note that this is a less flexible version of the
computation performed by QUEST(‘Epsilon’). This
routine does not allow variations in gamma, delta
or the psychometric function. It agrees with
what QUEST(‘Epsilon’) computes for gamma = 0.5,
delta = 0, Weibull function.

It would not be hard to fix this to include delta
and gamma as parameters, but QUEST(‘Epsilon’) seems
to do the trick.

8/26/94 ccc, dhb Wrote it.
8/30/94 dhb Comment comparing to QUEST(‘Epsilon’).