setting two different conditions for the experiment as a part of the initial script

[Kelsey A Brown]

Hello Everyone, 

I am trying to use E-prime to build a stop signal frustration task, but I 
have encountered a few complications in building the task. 
At the moment, I am trying to create an initial script that would allow 
E-prime to automatically run a participant in a condition (high frustration 
or low frustration) depending on the participant number that I input before 
running the experiment. 
So for example, if I wanted to run 80 participants, half would be placed in 
the high frustration condition and the other half would be placed in the 
low frustration condition. 

I have some ideas about how this could theoretically be carried out, but 
I'm not sure if/how this can actually be implemented in the script. For 
example, I would want the initial script to begin by telling the program to 
pull 40 random numbers 1-80 (I would need to somehow make the same 40 
numbers be pulled each time). The 40 numbers pulled would be placed in the 
low frustration condition where pctcorrect (percent correct)=.80. 
If else, (so if one of the other 40 numbers were pulled), place the 
participant in a high frustration condition where  pctcorrect (percent 
correct)=.30. 

e.g. If I were running the program and I typed in my participant number as 
3 and 3 was one of the random numbers pulled between 1 and 80 then the 
program would automatically run the stop signal task placing the 
participant in the low frustration condition where pctcorrect=.80 (where 
participants could accurately inhibit on 80% of stop signal trials). 

However, if the participant ID number was 8 and 8 was not one of the 40 
random numbers initially pulled between 1 and 80 then the program would 
place the participant in the high frustration condition where 
pctcorrect=.30. 


Is this something that is possible in E-prime? 

I hope this makes sense. Thanks in advance for your input! 
-Kelsey 

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