E-Prime provides the ability to log timestamp information for many of the actions related to preparation and actual display of the stimulus presentation objects, e.g., SlideImage, MovieDisplay, TextDisplay, most of which have been included in the previous section’s diagrams. For example, OnsetTime is the E-Prime variable that logs the timestamp of when the object began its critical action, such as drawing on the screen. In general, examining the value of a particular timestamp variable is not particularly useful for confirming the timing of a stimulus event or series of events. However, careful examination of particular combinations of timestamp information can prove to be extremely useful when attempting to confirm the timing accuracy of an E-Prime experiment.
The following articles have further information on Time Audit: