In the present study we examined, first, whether voluntary and involuntary attention manifest differently in people who differ in impulsivity (measured with the Barratt Impulsivity Scale). For Experiment 1, we used the spatial cueing task with informative and noninformative spatial cues to probe voluntary and involuntary attention, respectively. We found that participants with high impulsivity scores exhibited larger involuntary attention effects, whereas participants with low impulsivity scores exhibited larger voluntary attention effects. For Experiment 2, we used the correlated-flanker task to determine whether the differences between groups in Experiment 1 were due to high-impulsive participants being less sensitive to the display contingencies or to high-impulsive participants having a greater spread of spatial attention. Surprisingly, high-impulsive participants showed a greater sensitivity to contingencies in the environment (correlated-flanker effect). Our results illustrate one situation in which involuntary attention associated with high impulsivity can play a useful role.Keywords Spatial attention . Individual differences . Impulsivity . Voluntary attention . Involuntary attention Trait impulsivity has been shown to influence a range of psychological processes, including decision-making, career and social success, eating behavior, driving, and psychopathology (Dickman, 1993;Evenden, 1999). It has also been linked to attention in various tasks, including the stop-signal paradigm (Logan, Schachar, & Tannock, 1997), the attentional blink (Li, Chen, Lin, & Yang, 2005), and working memory tasks (Cools, Sheridan, Jacobs, & D'Esposito, 2007). These studies revealed performance deficits in participants with high trait impulsivity. In the experiments presented here, we probed different types of attention using two paradigms and found that both performance benefits and costs are associated with impulsivity. In addition, in the second experiment we tested two accounts that provide mechanisms for the differences we found between highand low-impulsive participants on attention tasks.
Experiment 1Spatial attention refers to the ability to select and prioritize parts of the environment for processing while ignoring others. Voluntary attention is the type of attention that is goal-directed and determined by the relevant task at hand. Involuntary capture of attention results when stimuli are selected due to saliency rather than to task relevance (Jonides, 1981). In Experiment 1, voluntary and involuntary attention were investigated using the spatial-cueing paradigm shown in Fig. 1.We varied voluntary and involuntary attention in separate blocks by varying the proportions of trials on which the target appeared in the cued location. In the involuntaryattention condition, the target location was random with respect to the cue location. To investigate voluntary attention, in separate blocks, the cue was made predictive of the