No response as correct response
No response as correct response
Hello,
I'm trying to design a go/no-go type task and for the practice session I would like to provide the participant with feedback. During go trials, I know how to provide feedback with the word "Correct" as described in the manual. However, I can't figure out how to let the program know that during no-go trials no response is actually the correct response.
Any help is appreciated!
-Maria
Hi Maria - In order to describe a null response as valid, you will want to use the response time value of ' -1 ' . Using -1 tells the software that you want to denote 'no response' as the correct response.
Here's an excerpt from the manual:
"An alternative to using the ! symbol is to define -1 as a valid response code on your trial. That way, only trials on which -1 is given as an option will continue automatically after the maximum time has been reached. Like other codes, if -1 is listed first, then it will be considered the correct response. This option can also be combined with the ! method if you want to define no response as correct but have automatic continuation regardless of the response. You can think of -1 as an actual "no response" button which is pressed at the maximum response time."
This text was taken from the following link: http://www.empirisoft.com/directrt/help/directrt_minmax_setting_rt_limits.htm
You may also want to look into the GNAT sample provided with the software in the 'Samples' folder. More information on this sample can be found here: http://www.empirisoft.com/directrt/help/directrt_samples_v2006_no_response_as_valid.htm
Please let me know if you have any additional questions or if I can help in any way.
