In my last post, I gave a brief introduction to intertrial coherence, which is a measure of how consistent oscillatory phase is across an ensemble of trials.
One thing I mentioned, right at the end, was that ITC is a compound, summary statistic that doesn’t in and of itself exist on a single-trial level. This has lead several people to think about how to link it to single trial behavioural measures such as reaction time.
Intertrial coherence (ITC) is a measure of how consistent oscillatory phase is across an ensemble of trials.
In the schematic below, we have a sine wave of an arbitrary frequency.
The amplitude of the wave is the distance between 0 and the wave at a given timepoint. So here, you can see it has a maximum of 1, indicated by the arrow. A complete cycle of of the wave is the amplitude peaking, declining to a trough, then hitting zero again.