I am trying to create an experiment that does the following:
- Presents three stimuli (Left, Center, or Right) at random;
- Keeps track of the number of times each stimulus has been presented;
- Requires NO response for the first three times a specific stimulus has been displayed;
- Requires a CORRECT response (1,2, or 3) upon the fourth presentation of each stimulus;
- Loops back around to present the initial stimulus again after the fourth presentation;
- For the first presentation in each set of four, displays a different stimulus image;
- Continues until a set time limit has passed.
The subject is first presented with an X on the left side of the screen; this signals him that this is the first presentation of the “Left” stimuli. The next three stimuli presented in the “Left” position are O, and he must press the “1” key upon the 4th “Left” presentation (which would be the 3rd O presentation.) After that presentation, the X on the left would be presented again, signalling the restart of the “Left” trials.
All of that also needs to be happening for the “Center” and “Right” areas of the screen, at the same time (only one stimulus displayed at any given time, though), with the presentations of “Left”, “Center” and “Right” randomized.
I’ve been working on this for a while, and have attached a package file to this post. It does the job, but only for the left side. Our goal is to be able to run this experiment in all possible combinations (left/center/right only, L+R, L+C, C+R, & L+C+R), and hopefully to add auditory and tactile stimuli as well.
Finally, in the package that is attached you’ll notice a “CUE” marker come up between each event. That’s just a spacer I placed in there for timing purposes–feel free to ignore it. Oh, and when running the package, select “Left Visual Group Only” from the list of participant groups.
Thanks for your time!
Ash’s Project 1-10.zip (4.66 KB)