Single access training stimuli were presented in randomized order without replacement across each trial block. This schedule resulted in three 6-d trial blocks for the GvF group and six 3-d trial blocks for the Glu-only, Fru-only, and sugar-naive training groups for a total of 18 sessions. GvF, Glucose versus fructose training group; Glu-only, glucose only training group; Fru-only, fructose only training group; COe, corn oil emulsion; dH2O, deionized water; sess., sessions; dep state, deprivation state; Ad lib, ad libitum.
*Approximately half of the rats in the GvF group received 0.56 m glucose on the very first session, while the other half received 0.56 m fructose. Sugars were presented in the indicated molar (m) concentrations. For brief access testing, stimuli were serially presented in 15-s trials in a randomized order across blocks of trials (without replacement).