Figure 5.
Effect of CBD administration (2.5–20 mg·kg−1, i.p.) on acquisition and retention of a conditioned food reward task. Nose-poke responses are reinforced when made within 8 s following a tone signalling availability of the sweet liquid reinforcer (50% vanilla Ensure in tap water). Each session lasted for 2 h or until 20 reinforced nose pokes were recorded. CBD treatment had no effect on the time to earn 10 reinforcers during the acquisition [F(3, 32) = <1] or retention [F(3, 25) = 1.692, n.s.] sessions. X-axis: treatment. Y-axis: the time elapsed between the first earned reinforcer and the tenth reinforcer.