Education
Losing focus is not proof that a student is lazy or unmotivated. Attention fluctuates, distraction competes for limited capacity, and the useful skill is often learning how to notice drift and return.
Human Performance
You can still care deeply about a goal and fail to make progress. Before assuming motivation has disappeared, ask whether attention, interruption or fatigue has made execution harder.
Human Performance
Digital systems do not need to damage the brain to affect performance. Frequent interruption, task switching and poorly designed environments are enough to change the conditions in which attention is used.