2.2.4. Three-chamber sociability test

The test apparatus was a rectangular, three-chambered transparent polycarbonate box (width = 42.5 cm; height = 22.2 cm; center chamber, length = 17.8; side chambers, length = 19.1 cm). The tested mouse was firstly placed in the center chamber allowing the exploration of the apparatus for 10 min (habituation). Afterwards, a stranger mouse was placed inside a cage in the left compartment while an empty cage (the object) was placed in the right one. The time spent interacting (sniffing) with the stranger mouse or the object was monitored for 10 min.