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. 2016 Jun 7;6:27389. doi: 10.1038/srep27389

Table 1. Quantitative measures of response vigour used to measure changes in motivation.

Lick Frequency (LFreq) Number of licks per trial, normalised to the total length of the trial.
Relative Lick Rate (LRel) Number of licks within defined sections of a trial (eg. Buffer, ITI, referred to as time-periods hereafter) normalised to the lick frequency (LFreq).
Lick Latency (LLat) Exact timing of first lick within a trial relative to trial onset.