Millisecond Forums

I am using Inquisit 4's "Color Word Stroop with Speech Recognition" script. This script has congruent trials, (e.g. the word "yellow" printed in the color yellow) and incongruent trials (e.g. the word "yellow" printed in red). I would like to keep the incongruent trials, but I would like to replace the congruent trials with control trials (e.g. the character string "XXXXXX" printed in the color yellow). I would like all trials to be either incongruent or control trials, so, for example, there would be no trials that present the word "yellow" in yellow ink, and all possible stimuli printed in yellow ink would be: red, blue, black, green, XXXXXX. I need to do this because I am interested in isolating interference effects from incongruent trials without measuring facilitation effects from congruent trials.

Perhaps related, I would like the automatic score calculations to still work. The metric I need is (average reaction time for all correct responses to incongruent trails) - (average reaction time to all correct responses to control trials).

I've tried playing with the script quite a bit but I cannot get this to work. If necessary, I can post the attempts I've made, but I figure there is probably an easy answer that I'm missing. I have a small amount of scripting experience but not with this program.

Thank you.