By charlottebooth - 9/30/2014
Hi everyone,
I am creating a task where words are shown and Pps have to indicate whether the word describes them by pressing 'Y' or 'N'. I'm just struggling with the error message. I want a text element to appear if they click any key that isn't a 'Y' or a 'N' to remind them of the task instructions basically.
Here is this script at the moment:
<trial positive>
/stimulustimes = [150=positive; 2500=describes]
/inputdevice = keyboard
/validresponse = ("Y", "N")
/errormessage = true(errortext, 1000)
/pretrialpause = 500
</trial>
However this script causes the errormessage to appear only when a valid response was made, which is exactly the opposite of what I want it to do.
Any hep would be much appreciated!
Thanks,
Charlottte
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By Dave - 9/30/2014
/ validresponse determines *which responses are allowed at all* in a given trial. If you wanted to allow participants to press any key, you would have to define
/ validresponse = (anyresponse)
/ correctresponse = ("Y", "N")
/ response = correct
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By charlottebooth - 10/1/2014
That's great! Only problem now is that my error message doesn't appear when they use a valid but not correct response! Any ideas?
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By Dave - 10/1/2014
Grrr, looks like there's an issue when specifying the /response attribute at the <trial>-level. Workaround is to do it at the <block>-level instead:
<block myblock>
/ trials = [1-4=mytrial]
/ response = correct
</block>
<trial mytrial>
/ stimulusframes = [1=mytext]
/ validresponse = (anyresponse)
/ correctresponse = ("Y", "N")
/ errormessage = true(x,500)
</trial>
<text mytext>
/ items = ("Stimulus")
</text>
<text x>
/ items = ("X")
/ color = (red)
/ position = (50%, 60%)
</text>
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