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newbie	newbie posted 5 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 5, Visits: 24	I'm currently programming a version of the go/no-go task in which participants need to make a double-response in one condition recording 2 responses. As such the trial has been programmed this way: <trial practicedoubleleft> / ontrialbegin = [values.cue_side=1] / pretrialpause = 0 / posttrialpause = 0 / validresponse = (46, 50, 57, noresponse) / correctresponse = (46, 57) / stimulustimes = [0=fix_green; 1000=practiceHS] / beginresponsetime = 1000 / timeout = 2500 / ontrialend = [values.double_time = 2500 - trial.practicedoubleleft.latency] / branch = [trial.p_double_l] </trial> <trial p_double_l> / ontrialbegin = [trial.p_double_l.insertstimulustime(clearscreen, values.double_time)] / validresponse = (57) / iscorrectresponse = [trial.p_double_l.response=="57" && trial.practicedoubleleft.response=="46"] / stimulustimes = [0=fix_green, practiceHS] / timeout = values.double_time / pretrialpause = 0 / posttrialpause = 0 </trial> The issue is that in the second 'trial', the practice HS stim changes whereas I need the stimuli to remain the same in both of these trials. I have tried /erase = false in the picture element but this hasn't worked. Thanks in advance
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Dave	Dave posted 5 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 12K, Visits: 98K	+x newbie - Monday, May 13, 2019 I'm currently programming a version of the go/no-go task in which participants need to make a double-response in one condition recording 2 responses. As such the trial has been programmed this way: <trial practicedoubleleft> / ontrialbegin = [values.cue_side=1] / pretrialpause = 0 / posttrialpause = 0 / validresponse = (46, 50, 57, noresponse) / correctresponse = (46, 57) / stimulustimes = [0=fix_green; 1000=practiceHS] / beginresponsetime = 1000 / timeout = 2500 / ontrialend = [values.double_time = 2500 - trial.practicedoubleleft.latency] / branch = [trial.p_double_l] </trial> <trial p_double_l> / ontrialbegin = [trial.p_double_l.insertstimulustime(clearscreen, values.double_time)] / validresponse = (57) / iscorrectresponse = [trial.p_double_l.response=="57" && trial.practicedoubleleft.response=="46"] / stimulustimes = [0=fix_green, practiceHS] / timeout = values.double_time / pretrialpause = 0 / posttrialpause = 0 </trial> The issue is that in the second 'trial', the practice HS stim changes whereas I need the stimuli to remain the same in both of these trials. I have tried /erase = false in the picture element but this hasn't worked. Thanks in advance What you need to do is use <values> and a <list> to select the HS stim item, and then you need to only do that at the start of the 1st trial, not the 2nd one. In short: <values> / itemnumber = 1 </values> <block exampleblock> / trials = [1-4 = first] </block> <trial first> / ontrialbegin = [ values.itemnumber = list.itemnumbers.nextindex; ] / stimulustimes = [0=fixation; 1000=examplestimulus] / timeout = 2500 / validresponse = (46, 50, 57, noresponse) / correctresponse = (46, 57) / branch = [ trial.second ] </trial> <trial second> / stimulustimes = [0=fixation; 1000=examplestimulus] / timeout = 2500 / validresponse = (57) </trial> <text fixation> / items = ("+") </text> <text examplestimulus> / items = exampleitems / select = values.itemnumber </text> <item exampleitems> / 1 = "Example A" / 1 = "Example B" / 1 = "Example C" / 1 = "Example D" </item> // 4 items in this example <list itemnumbers> / poolsize = 4 </list>
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newbie	newbie posted 5 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 5, Visits: 24	+x Dave - Monday, May 13, 2019 +x newbie - Monday, May 13, 2019 I'm currently programming a version of the go/no-go task in which participants need to make a double-response in one condition recording 2 responses. As such the trial has been programmed this way: <trial practicedoubleleft> / ontrialbegin = [values.cue_side=1] / pretrialpause = 0 / posttrialpause = 0 / validresponse = (46, 50, 57, noresponse) / correctresponse = (46, 57) / stimulustimes = [0=fix_green; 1000=practiceHS] / beginresponsetime = 1000 / timeout = 2500 / ontrialend = [values.double_time = 2500 - trial.practicedoubleleft.latency] / branch = [trial.p_double_l] </trial> <trial p_double_l> / ontrialbegin = [trial.p_double_l.insertstimulustime(clearscreen, values.double_time)] / validresponse = (57) / iscorrectresponse = [trial.p_double_l.response=="57" && trial.practicedoubleleft.response=="46"] / stimulustimes = [0=fix_green, practiceHS] / timeout = values.double_time / pretrialpause = 0 / posttrialpause = 0 </trial> The issue is that in the second 'trial', the practice HS stim changes whereas I need the stimuli to remain the same in both of these trials. I have tried /erase = false in the picture element but this hasn't worked. Thanks in advance What you need to do is use <values> and a <list> to select the HS stim item, and then you need to only do that at the start of the 1st trial, not the 2nd one. In short: <values> / itemnumber = 1 </values> <block exampleblock> / trials = [1-4 = first] </block> <trial first> / ontrialbegin = [ values.itemnumber = list.itemnumbers.nextindex; ] / stimulustimes = [0=fixation; 1000=examplestimulus] / timeout = 2500 / validresponse = (46, 50, 57, noresponse) / correctresponse = (46, 57) / branch = [ trial.second ] </trial> <trial second> / stimulustimes = [0=fixation; 1000=examplestimulus] / timeout = 2500 / validresponse = (57) </trial> <text fixation> / items = ("+") </text> <text examplestimulus> / items = exampleitems / select = values.itemnumber </text> <item exampleitems> / 1 = "Example A" / 1 = "Example B" / 1 = "Example C" / 1 = "Example D" </item> // 4 items in this example <list itemnumbers> / poolsize = 4 </list> That's fantastic - thanks very much.
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