Hi Larissa,
The math sounds good to me too: the max duration of timer-D1 is 1600ms, then timer_cue_D2 is 100ms and timer_D3 is 400ms, the max (effective) duration of timer-RT is 1700ms, and you add the 2000ms duration of wait-success, which gives you a max total of 5800ms, so by the time your script reaches getTimer("wait-separacao").wait() it will still still have at least 200ms to wait (or more, if timer-D1 was shorter and/or the participant pressed a key before the end of the 1700ms of timer-RT)
You need to place newVar("practiceRTs").global().set( [] ) , before before jump(startsWith("p_trial")) in the callback command, not before newButton, but I forgot to include .global() in my message above, so mea culpa
Jeremy