Table 1.

Summary of the reward ranking according to the two exposures of the three chambers tasks, before food deprivation and after food deprivation, for WT and β2^−/− mice.

	Non-deprived condition
	Time in contact	Number of USVs
WT	Social > Food	Social = Food
	Social > Object	Social > Object
	Object > Food	Food = Object
β2−/−	Social > Object	Social > Food
	Social > Object	Social > Object
	Food = Object	Food = Object
	Deprived condition
	Time in contact	Number of USVs
WT	Food > Social	Social > Food
	Food > Object	Food = Object
β2−/−	Food > Social	Social > Food
	Food > Object	Food = Object