Adaptive Processing Experiment

Comments

• eduard

  August 2018

  HI Sarah,

  the attached experiment should get you started.

  Some more thoughts though:

  If they receive equal to or greater than 75% accuracy, then the experiment is finished.

  As accuracy has to be calculated cumulatively, it is possible that you will have 100% on the first trial, just by chance. Therefore, you may want to you use some other metric to make sure that participant can actually reach it. For example, you could skip the first 10 trials, before you start adjusting the timing.
  Similarly, if your participant start out very poorly and respond incorrectly the first 20 trials, they will have 0% accuracy. But if they then, start to produce correct responses, it will take them at least 60 more trials (60/80) to reach the criterion and the timing would be adjusted for all 60 trials. But of course, if they respond correctly 60 times in a row, you wouldn't say that they need the timing after 60 trials to get the task, but rather the one after 20(ish). Do you know what I mean? So also here, you might to think about alternatives, e.g. measuring accuracy/adjusting the timing every 10 trials or so.

  How can I access the "Duration" element in the sampler through my inline_script

  You should check the beginner's tutorial: http://osdoc.cogsci.nl/3.2/tutorials/beginner/#step-10-draw-the-feedback-item
  the power of Python in Opensesame: http://osdoc.cogsci.nl/3.2/manual/python/about/
  and the importance of sequences for Opensesame: http://osdoc.cogsci.nl/3.2/manual/prepare-run/

  Basically, you can set an experimental variable in an inline_script like this: var.dur= 500. In the sampler item, you can add a variable to the duration field so that it is being determined on run time. Simply like: [dur]. This syntax basically means, that the field duration will be filled with the variable var.dur

  I hope this helps. Let me know if you need further advice (but give it a try first yourself).

  Eduard