Individual differences in response facilitation and inhibition were assessed through a modified go/no go task presented in alternating positive (where points could be gained) and negative (where points could be lost) incentive blocks. Neurotic extraverts showed enhanced facilitation on positive blocks following positive feedback. Neurotic introverts and individuals high in STAI trait anxiety showed enhanced inhibition on negative blocks. Individuals high in I 7 impulsiveness showed generally low inhibition. These results support models proposing that positive incentive motivation and its facilitatory response consequences peak in neurotic extraverts, whereas negative incentive motivation and its inhibitory effects peak in neurotic introverts. However, neurotic introverts were also relatively fast in responding following negative feedback, which confirms recent reports of 'anxious impulsivity.'