repeat trial after error


repeat trial after error

Author
Message
laurenemberson
laurenemberson
Esteemed Member
Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)

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>


Dave
Dave
Supreme Being
Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)Supreme Being (706K reputation)

Group: Administrators
Posts: 9.8K, Visits: 47K
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.

laurenemberson
laurenemberson
Esteemed Member
Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)Esteemed Member (1.6K reputation)

Group: Forum Members
Posts: 12, Visits: 24
Thanks so much Dave this helped a lot!!! 
GO


Reading This Topic


Login
Existing Account
Email Address:


Password:


Social Logins

Select a Forum....






Millisecond Forums


Search