Red Cross under stimulus for IAT task

I am doing an IAT task and I want a Red Cross to appear under the stimulus for every incorrect response and then make it disappear after the response is corrected.
How can I do that?
Thank you.

You need to present a feedback that is based on an incorrect response. This feedback needs two actions:

  • The first one will present another event that draws the red cross

  • The second action will restart the trial

For this feedback to work, you also need to tell SuperLab what is the correct response (Event Editor ➜ Correct Response tab).