reaction time feedback

Hi, I have a very simple Stroop task, in which my subjects press a keyboard key when they are finished overtly reading a slide (picture event) with colored words. I want to give feedback showing the response/reading time of that slide, but I have not been able to figure out how. Providing an immediately following text file with “LastCorrectRT” does not seem to work, as it only returns information saying the variable is empty. Please help.

Please see the following thread: