Chronic dietary choline supplementation modulates attentional change in adult rats

► Adult rats were maintained on a supplemented with choline. ► Experiment 1 investigated the effects of prior training with a stimulus on subsequent acquisition of conditioned suppression. ► Experiment 2 investigated the effect of prior nonreinforced exposure (latent inhibition). ► In both experiments, choline supplementation disrupted the loss of stimulus associability normally produced by preexposure. ► Chronic exposure to a choline-supplemented diet alter the behavior of adult rats.