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Time spent in white and black compartments of CPP chamber for individuality- and pair-housed females during pre-conditioning test in Experiment 1 (Panel A), Experiment 2 (Panel B) and Experiment 3 (Panel C). In all three panel figures, bar represents mean (±SEM) for time (sec) spent in compartment. Asterisk (*) represents significantly difference compared to time spent in black compartment, p<0.05.
