Differential effects of amphetamine and haloperidol on temporal reproduction: Dopaminergic regulation of attention and clock speed

► Human participants are studied using 7-s and 17-s peak-interval timing procedures. ► We examine changes in timing as a function of dopaminergic drug administration. ► Reliable individual differences were observed for drug effects on interval timing. ► Dopaminergic modulation of attention and clock speed is discussed.