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correct response sequence

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sdubrow	sdubrow posted 8 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 26, Visits: 143	Hello, Hello, I was wondering if it is possible to set up a sequence of correct responses for a trial type just as it is possible to specify a sequence of stimuli. Below are my trials where scenes1 and faces1 refers to a list of unique images (see below). There is a different correct response for each image. However, as far as I can tell, if I add a sequence of correct responses, it will treat all of them as correct. Is there a way to specify the order of correct responses? Thanks in advance! <trial enc1> /stimulustimes = [0=scenes1; 0=faces1; 2000=blank] / validresponse = ("a", "l") / correctresponse = ("a") / beginresponsetime = 0 / trialduration = 2500 / responseinterrupt = trial </trial> <item scenes1> /1 = "sun_atflrrvztuwhyjsr.jpg" /2 = "sun_bcnnnmofkferpazg.jpg" /3 = "sun_aathwbmlobsaswup.jpg" ... <item> Tags correct response
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Dave	Dave posted 8 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	Yes, you can do so using the <trial>'s /iscorrectresponse attribute and a <list> holding the respective "correct" keyboard scan codes. See e.g.: https://www.millisecond.com/forums/FindPost15355.aspx
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sdubrow	sdubrow posted 8 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 26, Visits: 143	Thanks! I am just having trouble getting the accuracy to be calculated correctly. The below will run but won't compute accuracy correctly whereas when I set selectionmode = trial.enc1.currentindex, it didn't run. Please advise. <list answers1> / items = (30, 38, 38, 30, 38, 38, 30, 30, 30...) / selectionmode = list.answers1.currentindex </list> <trial enc1> / stimulustimes = [0=scenes1; 0=faces1; 2000=blank] / validresponse = ("a", "l") / iscorrectresponse = [trial.enc1.response == list.answers1.nextvalue] / beginresponsetime = 0 / trialduration = 2500 / responseinterrupt = trial </trial>
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Dave	Dave posted 8 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	<list answers1> / items = (30, 38, 38, 30, 38, 38, 30, 30, 30...) / selectionmode = list.answers1.currentindex </list> This does not make sense, because is circular: You are instructing the list to select the item # currently selected by the list itself. > trial.enc1.currentindex There is no such thing as a <trial>'s current index. The list needs to be locked to the stimulus element it pertains to as in the example I linked: <text mytext> / items = ("A1", "A2", "B1", "B2") </text> * 30 = scancode for "A"-key / 48 = scancode for "B"-key * <list cresp> / items = (30, 30, 48, 48) / selectionmode = text.mytext.currentindex </list> In your case, based on your initial post, you'll want to lock the list to <picture scenes1> as in <list answers1> / items = (30, 38, 38, 30, 38, 38, 30, 30, 30...) / selectionmode = picture.scenes1.currentindex </list>
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