<P> Most educators and psychologists agree that the ability to focus and sustain attention on a task is crucial for the achievement of one's goals . </P> <P> Estimates for the length of human attention span are highly variable and depend on the precise definition of attention being used . </P> <Ul> <Li> Transient attention is a short - term response to a stimulus that temporarily attracts / distracts attention . Researchers disagree on the exact amount of human transient attention span . </Li> <Li> Selective sustained attention, also known as focused attention, is the level of attention that produces the consistent results on a task over time . Common estimates of the attention span of healthy teenagers and adults range from 10 to 20 minutes; however, there is no empirical evidence for this estimate . People can choose repeatedly to re-focus on the same thing . This ability to renew attention permits people to' pay attention' to things that last for more than a few minutes, such as lengthy films . </Li> </Ul> <Li> Transient attention is a short - term response to a stimulus that temporarily attracts / distracts attention . Researchers disagree on the exact amount of human transient attention span . </Li>

How long can your brain focus on one thing