If FEEDBACKFLAG has the 1 bit set, a color will appear inside the RESP_BOX rectangle each time the subject presses a response button. The RESP_BOX rectangle is RESP_BOXSIZE pixels square, centered at screen position RESP_XBOX,RESP_YBOX.

The displayed color depends on the status of the CORRECTCODE paramter and which button was pressed.

Default: RESP_BOXSIZE = 20.

See Also:
RESP_XBOX,RESP_YBOX, CORRECTCODE

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