Millisecond Forums

Problems with iscorrectresponse

https://forums.millisecond.com/Topic29593.aspx

By nanna137 - 8/20/2020

Hello all,

I want to use /iscorrectresponse to counterbalance which key to press on my trials. I have it currently set up as follows:

<trial practice_left>
/ pretrialpause = 300
/ validresponse = ("Q", "q", "P", "p")
/ iscorrectresponse = [(values.expcondition == 1 && trial.practice_left.response == "Q" || values.expcondition == 1 && trial.practice_left.response == "q")|| (values.expcondition == 2 && trial.practice_left.response == "P" || values.expcondition == 2 && trial.practice_left.response == "p")]

/ errormessage = (errormessage, 200)
/ responsemode = timeout (3000)
/ stimulustimes = [0=practicenames; 300 = eraser; 300= category_left]
/ posttrialpause = 300
</trial>

expcondition is defined globally as 0 but redefined onexptbegin as 1 or 2 (depending on the subject number).
The problem I am facing is that no matter what key I press, I always get the errormessage. I am new to Inquisit so I only half know what I am doing. I have tried several things to see where the problem lies (whether it is due to expcondition or whether it is due to using too many expressions), but nothing has worked so far.

Does anyone know where I am going wrong here?

Kind regards
By Dave - 8/20/2020

 
nanna137 - 8/20/2020
Hello all,

I want to use /iscorrectresponse to counterbalance which key to press on my trials. I have it currently set up as follows:

<trial practice_left>
/ pretrialpause = 300
/ validresponse = ("Q", "q", "P", "p")
/ iscorrectresponse = [(values.expcondition == 1 && trial.practice_left.response == "Q" || values.expcondition == 1 && trial.practice_left.response == "q")|| (values.expcondition == 2 && trial.practice_left.response == "P" || values.expcondition == 2 && trial.practice_left.response == "p")]

/ errormessage = (errormessage, 200)
/ responsemode = timeout (3000)
/ stimulustimes = [0=practicenames; 300 = eraser; 300= category_left]
/ posttrialpause = 300
</trial>

expcondition is defined globally as 0 but redefined onexptbegin as 1 or 2 (depending on the subject number).
The problem I am facing is that no matter what key I press, I always get the errormessage. I am new to Inquisit so I only half know what I am doing. I have tried several things to see where the problem lies (whether it is due to expcondition or whether it is due to using too many expressions), but nothing has worked so far.

Does anyone know where I am going wrong here?

Kind regards

The response property does not return the character imprinted on the key pressed (e.g. "p"), but the key's numerical keyboard scancode. See Tools -> Keyboard Scancodes in Inquisit Lab and https://www.millisecond.com/support/docs/v4/html/language/scancodes.htm

trial.practice_left.response == "p"
needs to be
trial.practice_left.response == 25

and so forth.
By nanna137 - 8/20/2020

 
Dave - 8/20/2020
 
nanna137 - 8/20/2020
Hello all,

I want to use /iscorrectresponse to counterbalance which key to press on my trials. I have it currently set up as follows:

<trial practice_left>
/ pretrialpause = 300
/ validresponse = ("Q", "q", "P", "p")
/ iscorrectresponse = [(values.expcondition == 1 && trial.practice_left.response == "Q" || values.expcondition == 1 && trial.practice_left.response == "q")|| (values.expcondition == 2 && trial.practice_left.response == "P" || values.expcondition == 2 && trial.practice_left.response == "p")]

/ errormessage = (errormessage, 200)
/ responsemode = timeout (3000)
/ stimulustimes = [0=practicenames; 300 = eraser; 300= category_left]
/ posttrialpause = 300
</trial>

expcondition is defined globally as 0 but redefined onexptbegin as 1 or 2 (depending on the subject number).
The problem I am facing is that no matter what key I press, I always get the errormessage. I am new to Inquisit so I only half know what I am doing. I have tried several things to see where the problem lies (whether it is due to expcondition or whether it is due to using too many expressions), but nothing has worked so far.

Does anyone know where I am going wrong here?

Kind regards

The response property does not return the character imprinted on the key pressed (e.g. "p"), but the key's numerical keyboard scancode. See Tools -> Keyboard Scancodes in Inquisit Lab and https://www.millisecond.com/support/docs/v4/html/language/scancodes.htm

trial.practice_left.response == "p"
needs to be
trial.practice_left.response == 25

and so forth.

Thank you so much! I didn't even know this was a thing since it's not needed for correctresponse.