Effects of anandamide (0, 1, 3, and 10 mg/kg, ip) on behavior in the attention task. a: Omission errors (percentage of trials on which no response was made). b: Anticipatory responses (number of responses during the inter-trial interval). c: Accuracy (number of trials with a correct response, as a percentage of all trials with a response). d: Latency on correct trials (number of seconds to respond on trials with a correct response). e: Latency on incorrect trials (number of seconds to respond on trials with an incorrect response). “*” indicates bars that differ significantly (p<.05) from vehicle (0 mg/kg anandamide). Error bars in all figures indicate s.e.m.