1995 Volume 37 Issue 4 Pages 240-246
The aim of this experiment is to study the effect of the length of the inter-food interval (IFI) on immediately following adjunctive drinking in rats, under variable time 112.5 s schedule. The U-shaped relation was found between the length of the IFI and the latency of immediately following licking. The animals began to drink earlier and stopped drinking earlier following intermediate IFI than following shorter or longer IFIs. No systematic relation was observed between the length of the IFI and the number of immediately following licking responses. It was suggested that under FT schedules in previous studies the expected length of the succeeding IFI affected the amount of drinking, whereas under the VT schedule of the present experiment the length of the preceding IFI affected the latency of drinking.