Selective attention is best described as focusing on a target while suppressing competing input.

• A. Sustaining attention over time
• B. Dividing attention between two tasks
• C. Setting boundaries to ignore distraction
• D. Focusing on a target while suppressing competing input

Answer: (D)

Selective attention is about directing cognitive resources to a specific stimulus or task while filtering out other incoming information. This is what lets you focus on a single conversation in a noisy room or a teacher’s voice in a busy hallway. The description that best fits this idea is focusing on a target while suppressing competing input—it captures both selecting what matters and actively down-weighting distractions.

In contrast, sustaining attention over time is about keeping focus for a duration (vigilance), dividing attention between two tasks is multitasking and distributing resources, and setting boundaries to ignore distraction is related to attention control but doesn’t precisely describe the selective filtering process.