Focus And Attention

Attention is the cognitive process of selectively concentrating on certain stimuli while ignoring others, while focus is the sustained application of that attention toward a specific task or goal over time.

Sustained (maintaining focus over time), selective (focusing on one thing amid distractions), divided (splitting focus across tasks), and alternating (switching between tasks).

The task-positive network (TPN), especially the dorsolateral prefrontal cortex and posterior parietal cortex, governs top-down, goal-directed attention.

The ability to selectively attend to one auditory source while filtering out others—yet still notice personally relevant stimuli (like your name) in unattended channels, demonstrating selective attention's flexibility.

The failure to notice an unexpected stimulus when attention is engaged elsewhere. The classic 'gorilla experiment' showed observers missing a person in a gorilla suit while counting basketball passes.

The failure to detect changes in a visual scene, especially during eye movements or brief visual disruptions, demonstrating that focused attention is needed to encode visual details.

Coined by Sophie Leroy, attention residue is the cognitive leftover from a previous task that lingers after switching, impairing performance on the new task until it dissipates.

Performance increases with physiological or mental arousal up to an optimal point, after which further arousal decreases performance—forming an inverted U-shape relationship between arousal and task success.

A time-management method using 25-minute focused work intervals separated by 5-minute breaks, with longer breaks every four cycles. It leverages timed urgency and frequent rest to sustain concentration.

Sleep consolidates memories, clears metabolic waste from the brain via the glymphatic system, and restores attentional resources. Sleep deprivation dramatically reduces sustained attention and working memory capacity.

Exercise increases blood flow and brain-derived neurotrophic factor (BDNF), improves prefrontal cortex function, and acute sessions as short as 10 minutes have been shown to sharpen attention.

A learning technique where review intervals are progressively lengthened to exploit the spacing effect—information is recalled better across expanding gaps than when reviewed in massed sessions.