RE: Picking trial layout based on random variable

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RE: Picking trial layout based on random variable

Picking trial layout based on random variable

Author	Message
nashby	nashby posted 12 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 78, Visits: 159	Hello so I am trying to get the stimulus frames in a trial to change dependent on the value of a randomly drawn number. Below should convey what I am trying to do although its clear the code is wrong ( I have tried multiple versions of below with no luck). Thanks in advance of any help. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ / stimulusframes = [1= option1, option2, option1t, option2t, option1b, option2b, option1o, option1bo, option2o, option2bo, totals, outcomes, selectinstructions], if values.side <= 50 else {1= option1, option2, option1k, option2k, option1bk, option2bk, option1ok, option1bok, option2ok, option2bok, totals, outcomes, selectinstructions;}]
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Dave	Dave posted 12 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	You can't do this in the /stimulusframes attribute directly. Instead you need to work with the setstimulusframe and/or insertstimulusframe function(s). Details are available in the documentation. However, it might be way easier to simply use different <trial> elements. Edit: Here's a quick, basic example: <values> / myvalue = 1 </values> <block myblock> / trials = [1=mytrial] </block> <trial mytrial> / ontrialbegin = [if(values.myvalue==1){ trial.mytrial.insertstimulusframe(text.b1,1); } else { trial.mytrial.insertstimulusframe(text.b2,1); }] / stimulustimes = [0=a,c] / ontrialend = [trial.mytrial.resetstimulusframes()] / validresponse = (57) </trial> <text a> / items = ("A") / position = (25%, 50%) </text> <text b1> / items = ("B1") / position = (50%, 50%) </text> <text b2> / items = ("B2") / position = (50%, 50%) </text> <text c> / items = ("C") / position = (75%, 50%) </text>
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nashby	nashby posted 12 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 78, Visits: 159	Thanks, used set stimulus frames and that works.
	Reply Like 15