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Junior Member
Join Date: Oct 2011
Titania is on a distinguished road Posts: 11
Posted November 10th, 2011 #11
Hi Monika,

What I intend to do is set up my experiment so that at the initial stage, participants are presented with a choice of either gold or silver. Depending on their response, they will be directed to two different outcomes. For instance, if they were to choose gold, I'd like to set it up such that they are then presented with the trial diamond or titanium. Alternatively, if they chose silver, they'd be presented with the trial aluminium or copper. The way my experiment is set up at the moment, regardless of the response, the participant is presented with diamond and titanium trial, then followed by aluminium and copper trial. All I want is for the presentation of the outcome to be dependent on the response made by the participant. At the moment, this is a one level decision tree, which I hope to build to at least two, and if possible three levels.

Please advice on how I can restrict the presentation of trials using macro in the block editor tab to be based on participants' responses.

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Senior Member
Join Date: Mar 2008
MonikaT is on a distinguished road Posts: 1,279
Posted November 11th, 2011 #12
A modified version of your experiment is attached. The changes that were made are below. The first block is where the changes were made.
  • The Use code values to determine the correct response was unselected under the Correct Response tab for all your events.
  • Your code values were attached to An event or stimulus list item. This was changed to "A trial".
  • The macro you had in place was modified. The Expression now states "Number of Trials Presented in This Block is equal to 1 trials (Using only the last 1 trials in the block and Trials marked with the code "Gold or Silver" equal to "Gold")
  • If True: Exit this block and present block "Diamond or Titanium"
  • If False: Exit this block and present "Aluminum or Copper"

  • Under the response is correct, Change value of code "Gold or Silver" to "Gold" and then Present the remaining events in the trial.
Attached Files
File Type: sl4 Gold or SilverrevB.sl4 (7.1 KB, 21 views)
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