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Feedback with audio and image presentation

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  • Feedback with audio and image presentation

    Participants do an identification task (hear a word with a simultaneous presentation of two pictures, participant presses a button corresponding to one picture). The feedback should look like this:

    1. image of check if correct (or X if incorrect), then
    2. the correct image + simultaneous re-presentation of audio stimulus

    I'm using the "feedback" tab in the event image where participants are choosing a picture. The problem I'm having is that the audio in the feedback will not play at all. I can't get it to simultaneously present with the correct image, or even if I delete all of the feedback items, the audio still won't play.


  • #2
    getting around the problem

    I couldn't figure out how to have that string be the feedback successfully, so i just made the one image (check or x) be the feedback, and then have the audio + image in the regular trial event sequence. since the same audio + image will appear no matter what the participant presses, this seems to work. the only trouble is that i have to upload the audio file twice. once for the first presentation of the trial, and then another file for the audio that will appear after the feedback. because i have 44 test trials, this is going to seem excessive that i have to load the 44 files two times, but at least I figured out something that works.

    i'll still appreciate any other suggestions if anyone has it though.



    • #3
      It's possible to do what you want, and easily so if you use the stimulus lists feature. Suggested approach:
      • Have the images that match the sound in, say, List A

      • Have the images that do not match the sound in List B

      • Have the audio files in List C

      • Create a trial variable (Experiment menu > Trial Levels) of type Location that has two levels. The purpose is to randomize the position of the pictures in Lists A and B.

      Your trial would then consist of:
      • Event 1 that uses images in List A

      • Event 2 that uses images in List B. Both this event and Event 1 should be using the trial variable to have their positions randomized.

      • Event 3 plays a sound from List C. Feedback should be: if response is incorrect, present another event shows the X. If response is correct, present another event that shows the check.

      • Event 4 would use List A again, i.e. the images that match the sound

      • Event 5 would use List C again

      Events 4 and 5 are basically presenting the correct image + audio stimulus again as feedback.