Why the same task feels different on different days

Your performance can change even when the task and your knowledge appear similar. A rushed afternoon may make a familiar procedure harder to follow. After insufficient sleep, keeping track of a conversation may require more effort.

Thinking takes place in a body and a situation. Pressure, rest, interruptions, physical discomfort, and competing concerns can affect the resources available for an activity.

This lesson explains how to take those conditions seriously without treating one difficult day as a fixed limit or assuming that every problem has the same cause.