Figure 3: GluN2B^NULL mice show increased perseverative responding during early reversal.

A. GluN2B^NULL mice did not differ from control on percent correct responding during discrimination or any reversal recording session. B. GluN2B^NULL mice did not significantly differ from controls on number of Win-stay trials made across recording sessions. C. Lose-shift trials did not significantly differ across genotypes on any recording session. D. Total error responding was not different during the first session of reversal but was significantly increased in GluN2B^NULLduring reversal session 3 and 4. E. GluN2B^NULL mice made significantly more Perseverative error trials during reversal session 3 and 4 compared to controls. F. Regressive error trials did not significantly differ between genotypes on any session. Data are means ±SEM. N=8 mice per genotype/recording session. * = p<.01