Table 2.

Statistical output of the mixed effects model for the variable intertrial interval (vITI) schedule. The results were analysed in a repeated measurements mixed effects model, using MATLAB version R2020b. The output is separated into the main effects from the model and those of the post-hoc fixed effects comparisons to the vehicle. We examined SCH23390 (0.01, 0.02, 0.04 mg/kg) and raclopride (0.03, 0.10, 0.30 mg/kg). Abbreviations: DF: degrees of freedom, Fstat: F statistic, SE: standard error of estimate, Ref: reference. Significant effects (P<0.05) are highlighted in grey and bold, and trend effects (0.05<P<0.1) are highlighted with bold font. N: vITI SCH: 36, vITI RAC: 35