Yerkes-Dodson Law - The Inverted-U of Performance

"Habit-formation is more rapid under conditions of high stimulation... but only up to a certain intensity, beyond which habit-formation is slower." — Robert Yerkes & John Dodson, 1908

In 1908, Yerkes and Dodson discovered that mice learned tasks fastest at moderate stress levels. Too little stress? They were bored and unfocused. Too much? They panicked and couldn't learn.

The Paradox

A little stress helps performance, but beyond a point,
more stress = worse performance. The sweet spot is in the middle.

📈 The Inverted-U Curve

Your Arousal Level 50%

Task Type

📋

Simple

Data entry, routine work

🧩

Complex

Problem-solving, creativity

😊

Your State

Focused

📊

Performance

85%

🎯 Optimal Zone — Peak performance!

🎭 Real-World Examples

🎾

Athletes

Flat → "In the zone" → Choke

📝

Test Takers

Careless → Alert → Panic

🎤

Presenters

Boring → Energetic → Stage fright

⏰

Deadlines

No urgency → Productive → Burnout

☕ The Coffee Analogy

☕

Drowsy
Low focus

☕☕

Alert
Peak focus

☕☕☕☕☕

Jittery
Can't concentrate

The Practical Wisdom

Some stress is good for you—it keeps you sharp and focused.

But there's a tipping point. The goal isn't to eliminate stress;
it's to find your optimal level for each task.

Simple tasks? You can handle more pressure.
Complex tasks? Back off and give yourself space.