In a noisy café a student focuses on a single conversation and tunes out the rest. Attention is that selective focusing of mental resources on particular information while filtering other input.

Attention can be bottom-up, captured by a sudden sound or movement, or top-down, directed by goals and expectations. Capacity is limited; trying to monitor too many streams produces errors. Sustained attention keeps focus over time, while divided attention attempts to handle multiple tasks. Disorders such as ADHD highlight how fragile these control systems can be.

Neuroscientists link attention to networks involving the frontal and parietal lobes. Training programs and mindfulness practices aim to strengthen the ability to stay on task and resist distraction. In everyday life, attention determines what enters memory and what shapes decisions. What we notice becomes the material from which we construct experience.

• Selective focusing of cognitive resources
• Limited in capacity and duration
• Guided by both stimuli and goals
• Foundational for learning and memory