Millisecond Forums

No, you cannot use errorstreak unless you programmatically consider slow responses as errors. You will want to use <values> to keep track of consecutive "too slow" responses (whatever that may mean concretely) and then /branch to a feedback <trial> if appropriate.

Thanks Dave,Tried writing values element, but couldn't do it.Can you please help with an example ? Lets say 600 ms is the ideal time to respond. And a message is displayed if subject is slow on three consecutive times .Thanks Abhi

<values>
/ slowrespcount = 0
</values>

<block myblock>
/ trials = [1-20 = mytrial]
</block>

<trial mytrial>
/ ontrialend = [if (trial.mytrial.latency >= 600) values.slowrespcount += 1 else values.slowrespcount = 0]
/ stimulusframes = [1=mytext]
/ validresponse = (57)
/ branch = [if (values.slowrespcount >= 3) trial.tooslowtrial]
</trial>

<trial tooslowtrial>
/ ontrialend = [values.slowrespcount = 0]
/ stimulusframes = [1=tooslowtext]
/ trialduration = 500
</trial>

<text mytext>
/ items = ("Press SPACEBAR as quickly as possible.")
</text>

<text tooslowtext>
/ items = ("You're too slow.")
</text>