10.1371/journal.pone.0077762.t003 Table 3  Proportion (%) of WT and 5-HT2CR KO mice reaching criterion in egocentric discrimination, full reversal, perseverance and learned non-reward tests.     Significantly fewer 5-HT2CR KO animals than WT animals reached criterion in the perseverance condition (x2 = 4.2, p = .04).