Educational reference
About this symptom
Distractibility describes attention being drawn easily to things other than the task at hand: background noise, movement, notifications, or an unrelated thought.
Two features make it burdensome. The first is how little it takes to interrupt. The second is the cost of returning: after an interruption it often takes considerable effort to recover the thread, so a short distraction can cost far more time than it occupied.
Internal distraction matters as much as external. Thoughts about other tasks, remembered obligations, or unrelated ideas can pull attention away just as effectively as noise, and are less visible to others.
Environments can help or hinder considerably. Reducing competing input, working in shorter defined blocks, and capturing intruding thoughts on paper rather than acting on them are common strategies, and are usually more effective than trying harder to concentrate.
Distractibility on its own is not diagnostic. It is common in the general population and increases with tiredness, stress and unfamiliar demands.