How do I clear a stimulus while still allowing time for a response? (case 487)

[CJNajdowski]

I'm creating an 2-back task in DirectRT but I'm having some trouble figuring out some timing issues. What I'd like to do is have a stimulus presented on the screen for 500 ms, and clear the stimulus but allow an add'l 2500 ms for response time (3000 ms total response window).

I've figured out a way to do this, but I'm hoping there's a better way. Specifically, for each trial, I have two stimulus commands. First, I'm presenting a letter with a fixed response window of 500ms (using min/max style feature and the "full" code). Second, I present nothing with a fixed response window of 2500 ms (again using min/max style feature and the "full" code). This is okay, but I think the data will require some manipulation (i.e., I think I'll have to figure out whether the response occurred during the first or second part of the trial, and adjust accordingly). Is there some other way to do this that allows for the use of the "clear" and "full" commands for the same stimulus?

Please let me know if you have any tips on how to do this more effectively. Thanks!