The Relationship between Impulsivity and Reward-Cued Spontaneous Eyeblink Rate Depends on Baseline Spontaneous Eyeblink Rate

The relationship between impulsivity, baseline blink-rate, and reward-cued blink-rate was investigated. Here we show that, with baseline blink-rate held constant, trait impulsivity predicts lower blink-rate in response to reward. A significant interaction effect suggests two different patterns through which dopamine activity, inferred from blink-rate, may lead to impulsivity.