Publisher Summary(#br)This chapter reviews evidence for different forms of attention orienting, focusing on the distinction between voluntary orienting and reflexive orienting. The chapter reviews evidence for implicit attention capture, noting the difficulty in determining when orienting is entirely reflexive and when it is influenced by the observer's expectations. Given this difficulty, the chapter suggests that implicit and explicit capture can be better understood by appealing to the distinction between transient and sustained components of attention. Orienting can produce observable behavioral responses, such as eye or head movements, but it can also be measured in the absence of observable behavior. Such covert orienting is typically inferred from differences in response times... among trials in which a cue accurately predicts the target location and trials in which it signals the wrong location. If observers are able to respond to targets on valid, better than on invalid trials, then they must have oriented to the presence of the cue. The consideration of different forms of orienting and the importance of both implicit and explicit capture provides a more complete understanding of the role of capture in perception and awareness.