Diego Instruments), and auditory PPI assessed as described (Geyer and Swerdlow, 2001). 5) Sucrose preference This experiment was always performed last, as mice were individually housed in order to measure liquid consumption. Sucrose preference was determined by the percentage of sucrose water consumed as a proportion of all water consumed (Willner et al., 1987). Water is delivered in our colony by Hydropac (Lab Products, Inc.), so an additional Hydropac containing sucrose water was added to the cage and the two packs were weighed daily.
