Keyboard_response_item only one response (No correction)

Comments

• Kantartur

  August 2017

  Ok I got the problem!

  When I activate "ignore ongoing keypress" in the keyboard_response_item there is no problem anymore!
• L_Geissert

  September 2020

  Hey Kantartur,

  my problem is the other way around. I want participants to be able to correct their response, actually, they should stay on the page until they have made the correct decision (it's an IAT). Do you know how to do it?

  Best,

  Laura
• eduard

  September 2020

  HI Laura,

  
  

  It isn't quite clear yet what exactly it is that you want to accomplish. If you only want the experiment to proceed if participants press the correct button, you could allow only that single button, right? Do you also need to record all other key presses before the correct response?

  Eduard

  
• L_Geissert

  September 2020

  Hey Eduard,

  thank you for the response. I try to explain it again. In my IAT participants either have to press "X" or "M", depending in which category they want to classify it. SInce I need the reaction time for the correct response, I want them to choose the right category. However, within the 40 Trails that I run, both "X" and "M" can be true, which means I cannot set a single button as a right response.

  Does that make more sense?

  Thanks, Laura
• eduard

  September 2020

  Hi Laura,

  Normally, you can add a column to your loop table that codes the correct response for a given trial. Then you can use this variable to set as allowed response for a particular trial. This procedure is explained in the step-by-step tutorial. However, like that you don't know when participants made a response error other than probably somewhat longer response times. So, maybe it makes more sense, to allow for correct and incorrect responses, but later during the analysis exclude trials on which participants made a mistake? Would that work too?

  Eduard

  
• L_Geissert

  September 2020

  Hey Eduard,

  thank you for your response. I'm not quiet sure if I understood you right, therefore, I attached two screenshots. In the first you I allowed both (X and M) as possible reactions.

  

  In the next one I definded with answer is correct for the given word.

  

  Since the allowed response contain both letters, the next trail appears after the correct and the incorrect response, which I actually try to avoid. For example, if the word "Papa" appears, participants have to press "x". If they press "m", they remain on this trail until they got it right.

  Deleting wrong responses is not an option, since it has been shown that it confounds the result.

  Does that make sense?

  Thank you, Laura
• eduard

  September 2020

  Hi Laura,

  the attached experiment visualizes what I meant. Do you understand what I mean? Is it applicable to your situation?

  Eduard

  Newexperiment.osexp

  
  

  
• L_Geissert

  September 2020

  Hi Eduard,

  it works perfectly fine! Thank you so much for your patience :)

  Best,

  Laura