RE: Random trial selection with branching

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RE: Random trial selection with branching

Random trial selection with branching

Author	Message
EstherKlinkenberg	EstherKlinkenberg posted 6 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 7, Visits: 66	Dear all, I'm struggling to create an experiment in which Inquisit randomly selects one of my three trial types. I've got multiple trials differing in how fast a stimulus will be presented after the mouse click of a participant. I would like to add a condition in which the trials are selected randomly. my branching code: / branch = [if (trial.1to4arrow_direct_500.response == "player4label") trial.1to3arrow_direct_500_excluded] / branch = [if (trial.1to4arrow_direct_500.response == 0) trial.1to4_direct_500] In both the trial.1to3arrow_direct_500_excluded and the trial.1to4_direct_500 the "500" stands for the ms it takes for a stimulus to appear. I created two other conditions in which the ms are 1000 and 1500. I would like to create a condition in which inquisit randomly selects the 500, 1000 or 1500 ms trial. I started making a <list> element with all the trials, however, now I am not sure how to tell inquisit to randomly select a trial from that list (including the if statements for the responses). I hope this makes sense, if not, I could try explaining it with my whole code but since it is quite elaborate I hope this is clear enough. Thank you in advance for helping! Kind regards, Esther
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Dave	Dave posted 6 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	+x EstherKlinkenberg - Monday, December 17, 2018 Dear all, I'm struggling to create an experiment in which Inquisit randomly selects one of my three trial types. I've got multiple trials differing in how fast a stimulus will be presented after the mouse click of a participant. I would like to add a condition in which the trials are selected randomly. my branching code: / branch = [if (trial.1to4arrow_direct_500.response == "player4label") trial.1to3arrow_direct_500_excluded] / branch = [if (trial.1to4arrow_direct_500.response == 0) trial.1to4_direct_500] In both the trial.1to3arrow_direct_500_excluded and the trial.1to4_direct_500 the "500" stands for the ms it takes for a stimulus to appear. I created two other conditions in which the ms are 1000 and 1500. I would like to create a condition in which inquisit randomly selects the 500, 1000 or 1500 ms trial. I started making a <list> element with all the trials, however, now I am not sure how to tell inquisit to randomly select a trial from that list (including the if statements for the responses). I hope this makes sense, if not, I could try explaining it with my whole code but since it is quite elaborate I hope this is clear enough. Thank you in advance for helping! Kind regards, Esther Suppose you have three <trial> elements a, b and c. You want ten each, and /branch to them randomly. Then you do <list triallist> / items = (trial.a, trial.b, trial.c) / poolsize = 30 / selectionmode = random / replace = false </list> with <trial example> ... / branch = [if (true) list.triallist.nextvalue] </trial> Edited 6 Years Ago by Dave
	Reply Like 35
EstherKlinkenberg	EstherKlinkenberg posted 6 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 7, Visits: 66	+x Dave - Monday, December 17, 2018 +x EstherKlinkenberg - Monday, December 17, 2018 Dear all, I'm struggling to create an experiment in which Inquisit randomly selects one of my three trial types. I've got multiple trials differing in how fast a stimulus will be presented after the mouse click of a participant. I would like to add a condition in which the trials are selected randomly. my branching code: / branch = [if (trial.1to4arrow_direct_500.response == "player4label") trial.1to3arrow_direct_500_excluded] / branch = [if (trial.1to4arrow_direct_500.response == 0) trial.1to4_direct_500] In both the trial.1to3arrow_direct_500_excluded and the trial.1to4_direct_500 the "500" stands for the ms it takes for a stimulus to appear. I created two other conditions in which the ms are 1000 and 1500. I would like to create a condition in which inquisit randomly selects the 500, 1000 or 1500 ms trial. I started making a <list> element with all the trials, however, now I am not sure how to tell inquisit to randomly select a trial from that list (including the if statements for the responses). I hope this makes sense, if not, I could try explaining it with my whole code but since it is quite elaborate I hope this is clear enough. Thank you in advance for helping! Kind regards, Esther Suposse you have three <trial> elements a, b and c. You want ten each, and /branch to them randomly. Then you do <list triallist> / items = (trial.a, trial.b, trial.c) / poolsize = 30 / selectionmode = random / replace = false </list> with <trial example> ... / branch = [if (true) list.triallist.nextvalue] </trial> Thanks!!
	Reply Like 37