Correct and incorrect responses

Hello, im making an IAT where i would like to have the participant during the practice session be aware of the incorrect responses being made. However, when the actual test actually begins, i do not want the incorrect response message to appear if he/she makes an incorrect entry. is this possible? so basically can this feature be activated/deactivated at certain points in the IAT thanks.

Not within the same IAT input file. The only workaround I can think of would be to run two back-to-back sessions where the practice session is fully contained in a separate folder than the main session. That way you could have separate "incorrect.txt" files.