a strong trendp = 0.061
Rats injected with the highest (20 mg/kg) dose of KET displayed a strong trend ( p = 0.061) towards a lower proportion of lose–shift behaviors following true negative feedback compared to the control group (statistically significant main effect of treatment ( F (3,25) = 3898, p = 0.021, Fig. 2 b), regardless of the time (1, 24, or 48 h) after injection (non-significant treatment × test interaction ( F (6,50) = 1955, NS).