GoNoGo-Task: avg_rt for Go-Trials

Comments

• eduard

  February 2018

  Hi vvogel, the easiest way is probably to select the go trials only after collecting the data. You can easily select cases with Excel's pivot tables, and plenty other tools in other programming languages.

  If you need those response times for providing feedback in the experiment, then you would need to do some coding.

  Let me know if you need help with that, then I give you some pointers.

  Eduard

  
• vvogel

  March 2018

  Thank you for your answer!

  I actually want to provide feedback in the experiment and I am not sure about the coding. Maybe you could help me or give me an idea for the coding?

  Thank you,
  Verena
• eduard

  March 2018

  Hi Verena,

  Before a block begins, you have to initialize some variables:

  var.alltimes = 0 # adding up all the response times
  var.numberGoTrials = 0 # counting all the go trials
  var.meanRT = 0 = # mean RT for go trials
  

  You probably have the variable trial_type (or something similar) defined that has the values go or nogo. After they keyboard response item, you could add an inline_script to your trial sequence and put this code in the run phase:

  var.alltimes += var.response_time
  var.numberGoTrials += 1
  var.meanRT = var.alltimes / float(var.numberGoTrials)
  

  in the feedback item you can then use the variable var.meanRT.

  Hope this helps,

  Eduard