To assess accuracy of subject responses during a paradigm you need 3 things:

• within the parameter file, use the ID code to identify which response would be correct for each trial
• set the CORRECTCODE variable in the parameter file to use the ID code values
• run the MAPRESPONSES command during the scan to calibrate which response button means what

This is described in the Showplay manual page for: Correctcode

See Also:
ShowPlay Tutorial, ShowPlay Home, ShowPlay Manual, CIGAL Home, CIGAL Manual,