How to give feedback based on block trial success

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How to give feedback based on block trial success

How to give feedback based on block trial success

Author	Message
rburtonaus	rburtonaus posted 11 Years Ago Topic Details Share Topic
Group: Forum Members Posts: 8, Visits: 23	I have 18 blocks of trials. Each block goes for an ever shorter duration. I am trying to provide feedback on which trials were identified with an accuracy of 80% or more. I have tried a variety of different codes with no success. The last one uses the list function: <page end> ^^^ Thank you for participating in this study ^^^ You were able to achive 80% for the following durations <% list.mylist.items%> ^^^ You might like to record this information for future reference ^ If you have not already completed the Variable stimuli study, please do it now. <list mylist> </list> I used the following instruction to add items to mylist (the second is set (300block) is w: <block 300block> /onblockbegin = [values.reach=300] /skip = [values.skipp==1] /trials = [1-5 = noreplace(300up, 300down)] /onblockend = [if(block.600block.percentcorrect<70) list.mylist.insertitem("300 ms", list.mylist.itemcount + 1);] </block> Nothing seems to generate a response in the 'page End' text.
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Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	<% list.mylist.items%> is not supposed to return anything. The 'items' property is an indexed collection property. You need to specify which item you want to retrieve as in e.g. list.mylist.items.2 for the 2nd item. Edited 11 Years Ago by Dave
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rburtonaus	rburtonaus posted 11 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 8, Visits: 23	I tried list.mylist.items.1 still nothing At the end I got the message: "Expression '600ms' is invalid. Expression contains an unknown element or property name." I tried "600 ms", '600 ms' and 600 ms all returned error messages. I can't seem to add items to the list using /onblockend = [list.mylist.insertitem("600 ms", list.mylist.itemcount + 1);] or /onblockend = [if(block.600block.percentcorrect<70) list.mylist.insertitem("300 ms", 1);] or even /onblockend = [list.mylist.insertitem("600 ms", 1);]
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Dave	Dave posted 11 Years Ago ANSWER Post Details Share Post
Group: Administrators Posts: 13K, Visits: 108K	<expt> / blocks = [1=block1] </expt> <block block1> / postinstructions = (pg1) / onblockend = [list.mylist.insertitem("600 ms", list.mylist.itemcount +1)] / trials = [1=mytrial] </block> <list mylist> </list> <trial mytrial> / validresponse = (57) / timeout = 1000 </trial> <page pg1> <%list.mylist.items.1%> </page> works perfectly fine for me in the current Inquisit release (4.0.5.0). Have you made sure your installation is up to date?
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rburtonaus	rburtonaus posted 11 Years Ago ANSWER Post Details Share Post
Group: Forum Members Posts: 8, Visits: 23	The update solved the problem! Thanks for your help
	Reply Like 16