The effect of KO and IMIP on resignation/depression in the Conditioned Light Extinction Test. The total active lever presses on day 2 (TALP D2) vs. total active lever presses on day 3 (TALP D3). (a) Male rats (b) Female rats. * p<0.05 (TALP D2 vs. TALP D3). The box plots show the 10th, 25th 50th (median), 75th and 90th percentiles).