control max trial type in a row

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control max trial type in a row

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lir1995	lir1995 posted 5 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 40, Visits: 190	Hi Dave, Is there a way in Inquisit to control for the number of the same type of trial that occurs in a row (either by trial type or the type of response made). For example, if my experiment switches between correct and incorrect trials, I do not want more than 4 correct trials in a row to limit participants from pressing yes so many times in a row. Ideally, this would be based on the trial type itself, regardless of how the participant actually responds. Is there a way to do this? I had tried doing this using the branching attribute, but was unsuccessful. Thanks!!
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Dave	Dave posted 5 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	+x lir1995 - 12/2/2019 Hi Dave, Is there a way in Inquisit to control for the number of the same type of trial that occurs in a row (either by trial type or the type of response made). For example, if my experiment switches between correct and incorrect trials, I do not want more than 4 correct trials in a row to limit participants from pressing yes so many times in a row. Ideally, this would be based on the trial type itself, regardless of how the participant actually responds. Is there a way to do this? I had tried doing this using the branching attribute, but was unsuccessful. Thanks!! Yes, you can do so by sampling trials from a <list> and setting the list's /maxrunsize according to your needs. Suppose you have two <trial> elements A and B, 20 trials total (10 x A, 10 x B), and want to allow a maximum of 3 trials of the same type in a row. Then you do: <trial a> ... </trial> <trial b> ... </trial> <list triallist> / items = (trial.a, trial.b) / poolsize = 20 / maxrunsize = 3 </list> with <block example> / trials = [1-20 = list.triallist] </block>
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