[open] Stop Signal Task
Hello,
I am new to OpenSesame and I am trying to implement a stop signal task.
In the stop signal task, there are two kinds of trial types, namely go-trials and stop-trials. I need the program to randomly run one of the two trials (sequences) multiple times. I tried specifying the needed variables in a loop-object, but it only lets me create one sequence that handles one trial type. However I need it to pick between two possible sequences randomly and run them several times?
Is something like this possible in Open Sesame? So far it would only let me rum one sequence several times and not multiple ones at random.
Thanks for your help!
Regards
Ivan
Comments
Hi Ivan,
Surely this is possible. What you can do is place a sequence item in your loop item, and place two sequence items (for your two trial types) in that first sequence item. In your loop item you decide whether a go-trial or stop-trial should be run (e.g. by having a variable 'type' with values 'go' and 'stop'). Now if you click on the sequence item that contains two sequence items, you can see so-called run-if statements. Both trial sequences are set to run always. What you can do here is insert these two statements:
run-if: [type] = 'go' (for the go trial)
run-if: [type] = 'stop' (for the stop trial)
Hope this helps.
Cheers,
Josh