This review examines some of the definitional issues of attention and the related constructs of working memory and executive control. Measurement approaches to two attention elements, inattention and impulsivity, which are relevant to the diagnosis of attention deficit hyperactivity disorder, are also explored. Features of Stroop and Stroop-like tasks, continuous performance tests, and assessment paradigms that have a volitional or motivational aspect, such as delay of gratification, are highlighted. The conclusions emphasise the multidimensional nature of attentional constructs and the care that must be taken when attempting to measure a single attentional element.