Psychological Test Library

"It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so."

— Mark Twain

Classic Cognitive Tasks

Click a card to read about the task, then run a short live demo in your browser.

Educational demos only

These are well-known paradigms from cognitive psychology and cognitive neuroscience. Each card opens a short live demo you can try in the browser — attention, inhibition, working memory, flexibility, and decision-making under uncertainty.

They are not clinical assessments, not diagnostic tools, and not substitutes for professional evaluation. Scores from casual demos vary with practice, fatigue, device, and distraction.

For learning and curiosity — not diagnosis, screening, or treatment advice.