RE: repeat trial after error

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repeat trial after error

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laurenemberson	laurenemberson posted 8 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 12, Visits: 24	Hi-- This seems like a simple one but I can't find an existing forum thread on this issue. I want to repeat a trial after an error. Here is the relevant part of my code. Any help is much appreciated! ~Lauren <item familiarizationPics> /1 = "images/ATflwr1.jpg" /2 = "images/ATfish1.jpg" /3 = "images/ATbird4.jpg" /4 = "images/ATdogg2.jpg" /5 = "images/ATflwr1.jpg" ... </item> <picture familiarization> / items = familiarizationPics / select = sequence / size = (400, 400) / erase = false </picture> <trial famTrial> / stimulustimes = [0=familiarization; 300=blank] / validresponse = (noresponse,"1","2") / iscorrectresponse = [trial.famTrial.response == list.famAnswers.nextvalue] / beginresponsetime = 0 / trialduration = 1000 / responseinterrupt = trial / errormessage = (wrong,500) </trial> <block famBlock> / preinstructions = (intro,famInstruct) / trials = [1 = famInstructionsWithPic; 2-449 = famTrial] / errormessage = false / blockfeedback = (correct) / ontrialend = [if (block.famBlock.errorstreak == 11 ) script.abort();] </block> Tags error no replacement repeat trial
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Dave	Dave posted 8 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	+x laurenemberson - Thursday, December 29, 2016 Hi-- This seems like a simple one but I can't find an existing forum thread on this issue. I want to repeat a trial after an error. Here is the relevant part of my code. Any help is much appreciated! ~Lauren <item familiarizationPics> /1 = "images/ATflwr1.jpg" /2 = "images/ATfish1.jpg" /3 = "images/ATbird4.jpg" /4 = "images/ATdogg2.jpg" /5 = "images/ATflwr1.jpg" ... </item> <picture familiarization> / items = familiarizationPics / select = sequence / size = (400, 400) / erase = false </picture> <trial famTrial> / stimulustimes = [0=familiarization; 300=blank] / validresponse = (noresponse,"1","2") / iscorrectresponse = [trial.famTrial.response == list.famAnswers.nextvalue] / beginresponsetime = 0 / trialduration = 1000 / responseinterrupt = trial / errormessage = (wrong,500) </trial> <block famBlock> / preinstructions = (intro,famInstruct) / trials = [1 = famInstructionsWithPic; 2-449 = famTrial] / errormessage = false / blockfeedback = (correct) / ontrialend = [if (block.famBlock.errorstreak == 11 ) script.abort();] </block> Strictly speaking, there is no way to repeat a trial. Instead you need to frame the problem in terms of item selection, i.e. in any given trial, only select a new item if the previous trial was answered correctly. Example: <values> / itemnumber = 1 </values> <block myblock> / trials = [1-5 = mytrial] </block> <trial mytrial> / ontrialbegin = [if (trial.mytrial.correct) values.itemnumber += 1] / stimulusframes = [1=mytext] / validresponse = ("1","2") / correctresponse = ("1") / branch = [if (trial.mytrial.error) trial.mytrial] </trial> <text mytext> / items = myitems / select = values.itemnumber </text> <item myitems> / 1 = "A" / 2 = "B" / 1 = "C" / 2 = "D" / 1 = "E" </item> Hope this helps.
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laurenemberson	laurenemberson posted 8 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 12, Visits: 24	Thanks so much Dave this helped a lot!!!
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