Good Systems · public information library

Why has my performance changed so much?

People come here to understand why something in everyday life feels harder, different or more costly than it should — and what might make it work better.

Short answer

Performance can change when the task, environment, recovery or health changes—even if your ability has not disappeared.

What this can look like

A task may be easy one day and much harder the next.

Why it can happen

Compare conditions around better and harder days before drawing a conclusion about yourself.

What might help

Compare conditions around better and harder days before judging your ability.

What the research helps explain

WHO describes burn-out as an occupational phenomenon linked to chronic workplace stress that has not been successfully managed. Australian work guidance recognises that workload, control, support and work design affect wellbeing and performance.

What can vary

Fatigue and cognitive changes can have many causes, including health, sleep, medication, stress and caring load. A public page cannot diagnose burnout, depression or illness; seek appropriate advice for new, severe or concerning changes.

For this situation

For you, describe the specific work that changed, not just “I am worse”.

More info and original sources

Poko summarises the relevance of public original sources and links out for anyone who wants to read more.