Inquisit Language Reference
The trialduration attribute fixes the duration of the trial to the specified number of milliseconds.
<likert> <openended> <slidertrial> <trial>
|A integer value expressing the duration of the trial in milliseconds.
If the subject does not respond before the duration expires, the trial ends and the next trial begins. If the subject responds before the duration is over, Inquisit pauses for the remainder of the duration before moving to the next trial.
See How to Control Trial Duration and Inter-Trial Intervals for more details on controlling timing of trials.