malfunction in adaptive n-back task script

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malfunction in adaptive n-back task script

malfunction in adaptive n-back task script

Author	Message
IMPS	IMPS posted 8 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 1, Visits: 2	Hi. The script of the adaptive n-back task does not work properly. It is only starting the first 2 trials and then stops giving this error message: Unable to initialize <picture nontargetshape> item number 0. Verify the item exists and is correctly defined. We did not do any changes to the script after downloading it. Therefore I assume that others might have encounterd similar problems and as I am completely unfamiliar with programming support would be highly appreciated. Thanks for any help. Tags adaptive n-back task working memory
	Reply Like 112
Dave	Dave posted 8 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 104K	There is a minor mistake in the script's <list notargetvalue> element that can lead to the detailed error. The fix is to change the erroneous /selectionmode specification <list notargetvalue> /items = (1, 2, 3, 4, 5, 6, 7, 8) / not = (values.currenttarget) / selectionmode = replace </list> to the proper <list notargetvalue> /items = (1, 2, 3, 4, 5, 6, 7, 8) / not = (values.currenttarget) / selectionmode = random / replace = true </list>
	Reply Like 116
PWillette	PWillette posted 8 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 2, Visits: 2	This solution also works for the following error: n-Back was working well using using Inquisit 4, but it would present the same picture ("1.gif") over and over again. Once I made this change, the adaptive n-Back test worked perfectly.
	Reply Like 100
PWillette	PWillette posted 8 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 2, Visits: 2	I'm sorry...I meant to say the same picture repeated using Inquisit 5.
	Reply Like 128