error with response box in stop signal paradigm

David McFarlane mcfarla9 at msu.edu
Tue Oct 7 16:39:24 UTC 2008


Shu Fang,

>I used e-prime to creat a program of stop signal paradigm. Everything
>is good when I used keyboard to record subject's response. But the
>feedback of response is wrong when I used response box to record data.
>The feedback is abnormal both in go trial and stop trial. Does
>response box can only use to record the experiment which subject has
>to respond everytime? or I can set the program that response boc can
>still record even without any response (in stop trial)?

You have to set the input mask of your SRBox separately from the 
input mask of the keyboard.  Go to the Duration/Input tab of your 
response object, click on the SRBox device, and then edit the 
Allowable, Correct, Time Limit, and End Action as appropriate for 
your SRBox input.

To repeat:  Allowable, Correct, Time Limit, and End Action do not 
just carry over when you add more input devices to a response object, 
you have to set these individually for each input device.  This is a 
feature, as it allows each input device to have different parameters 
as appropriate.

Hope this helps,
-- David McFarlane, Professional Faultfinder


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