a strong trendp = .08
Both male and female rats responded with reduced number of lever presses, and rewards earned, to a similar extent as, for rewards earned, there was no significant drug‐sex interaction: F(1,34) = 0.99, p > .05; a strong trend to an effect of sex F(1,34) = 5.72, p = .08; and a significant effect of drug: F(1,34) = 15.20, p < .0001.