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Post by regina on May 13, 2020 16:50:10 GMT
I am programming a sequential priming task. On each trial, a prime stimulus is presented, followed by a target stimulus. There are, say 12 different prime stimuli that belong to two categories. Furthermore, there are 12 different target stimuli that also belong to two different categories. I want to set up the task such that the combination of the prime and target stimuli is determined randomly for each participant, with the restriction that each prime category is paired equally often with each target category, and that all stimuli are presented equally often. In other experimental software packages, this can be done by having different stimulus lists (one for each prime and target category), and the task is set up such that in each trial a prime and a target stimulus is drawn from the lists randomly without replacement. Does PsyTookit have a similar feature or do you have another suggestion how I could implement this in the PsyToolkit programming language?
Thank you very much for your help.
Best Regina
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Post by alexandra (AEC) on May 15, 2020 12:40:29 GMT
Hi Regina,
while I am quite new to Psytoolkit, I am working on a conditioning experiment right now and had probably a relevant question to yours (look for AEC as guest and random assignment to variables). I received a really helpful response, which included to create global variables in a separate block before your actual tasks start. Through this you can randomly assign combinations each time a participant does your experiment. You might also want to create a table that defines the specifics of the combinations. Be aware that you cannot use the global variable name in your table. I got around this by using numbers instead in my table and used if-loops in my task to call the global variable indicated by the number in the table.
Best Alexandra
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