I am currently creating a memory experiment in which participants are required to recall the location and order of stimuli (.jpg images) as they are presented on the screen. The task is meant to be adaptive, meaning the difficulty increases (adding more stimuli to be remembered) when the participant performs well and decreases (reducing number of stimuli to be remembered) when the participant fails to recall a sequence correctly.
I’ve created a stimulus list containing all of my 15 possible stimuli to be presented, but would like to initially randomly show 3 from this list at the beginning of the experiment, then have the program increase and decrease (by one) the number of stimuli randomly pulled from the list, depending on the participant’s performance.
When I randomize and present stimuli from a list, it presents all 15 stimuli successively. How do I program the task to only show 3 of these stimuli initially from the list of 15? In addition, how do I then make this list adaptive to the participant’s performance?
Thank you for your time,