Does anyone have a matlab code for behavioral identificaion experiment using 2 interval alternate forced choice procedure

I have to run an experiment where the subject has to label a sound file as 'ta' or 'da' by clicking on the screen and the task should be administered using the two interval alternate forced choice method. There are 11 pairs of stimuli. 6 iterations of each of the 11 pairs has to be done. Pls help . Also at the end of the experiment a graph has to be plotted which plots percentage identification vs stimulus number.

Answer 1

[Wayne King]

There are publicly available MATLAB toolboxes for psychophysics research (one example):

http://psychtoolbox.org/HomePage

The above supports both auditory and visual psychophysics.