Figure 1. Interstimulus Interval
Interstimulus Interval is defined as the duration of time between the offset of one stimulus and the onset of another stimulus. In (Figure 1) the duration between the offset of the stimulus S1
and onset of the stimulus S2
is the Interstimulus Interval. Interstimulus Intervals are commonly used as an experimental factor in priming experiments.
In the example shown in (Figure 2) we have a trials timeline containing an Interstimulus Interval of of 20ms as the difference between the finish time of S1
(60ms) and the start time of S2
(80ms) is 20ms. Setting stimulus start time and duration is done in the trials timeline editor as shown in (Figure 4).
In the example shown in (Figure 3) we have a trials timeline containing an Interstimulus Interval of of 20ms as the difference between the finish time of S1
(60ms) and the start time of S2
(80ms) is 20ms. Additionally, we have placed an interval construct ISI
on the timeline to explicitly define the interval.
Using an explicit interval construct provides the following benefits:
Conduct simple psychology tests and surveys, or complex factorial experiments. Increase your sample size and automate your data collection with experiment software that does the programming for you.
Behavioral experiments. Superior stimulus design. No code.