I had posted this in a reponse to another thread, but I wanted to make sure it is seen. Apologies for posting twice though!
I am designing a simple verbal n-back task, with a letter displayed for 0.5s followed by a 2.5s blank screen ISI.
I have my n-back designed as each trial containing 18 letter events for 0.5s, and each letter event is followed by a blank screen ISI for 2.5s. Is it possible to use a stimulus list instead? How do I have the stimulus list display each letter for one length of time and the blank screen for a different length of time?