User`s guide

E-Prime User’s Guide
Appendix E: Object Execution Timing
Page A-58
Figure 2. Event mode timing with no PreRelease
Duration is calculated from the actual onset time of the object. With Event-Event mode, the
Duration of the object is maintained, and OnsetDelay is expected to be positive due to the
processing time necessary to set up the next object.
Setup Sync
A.OnsetDelay
A.Duration
A.ActionDelay
Setup Sync
B.Duration
B.ActionDelay
Actual Duration
(B.OnsetTime - A.OnsetTime)
B.OnsetDelay
Stimulus A remains
until replaced with the
next stimulus.
Stimulus B remains
until cleared or
replaced with the next
stimulus.
Previous object did
not use PreRelease
so A.TargetOnsetTime
is some time in the
past.
A.TargetOnsetTime
A.OnsetTime A.ActionTime
A.OffsetTime
B.TargetOnsetTime
B.OnsetTime
B.ActionTime B.OffsetTime
B.FinishTime
A.FinishTime
B.StartTime
A.StartTime
Figure 3. Cumulative mode timing with sufficient PreRelease
Duration is calculated from the target onset time so that the onset of each event occurs at fixed
intervals. With Cumulative-Cumulative mode (and PreRelease), the Duration is shortened to
maintain a fixed interval between onsets of objects.
Setup Sync
A.OnsetDelay
A.Duration
A.ActionDelay
PreRelease from
previous object
B.PreRelease
B.Duration
Setup Sync
B.OnsetDelay
B.ActionDelay
A.PreRelease
Actual Duration
(B.OnsetTime - A.OnsetTime)
Stimulus A remains
until replaced with the
next stimulus.
Stimulus B remains
until cleared or
replaced with the next
stimulus.
Duration is shortened
by the amount of any
OnsetDelay.
Duration is shortened
by the amount of any
OnsetDelay.
B.StartTime
A.StartTime
A.FinishTime
A.TargetOnsetTime
A.OnsetTime
A.ActionTime
A.OffsetTime
B.TargetOnsetTime
B.ActionTime
B.OffsetTime
B.FinishTime
B.OnsetTime