CognitiveDrill
CognitiveDrill is a free web platform offering 43 cognitive tests across 7 domains that run directly in your browser. Each test takes under two minutes and returns a single, honest metric—no accounts, no paywalls, no diagnostic claims.
Key Features
- Reaction & Response Speed (5 tests): Simple reaction time, auditory reaction, choice reaction, Go/No-Go, and gamer-focused variants—all reported in milliseconds using median of five trials.
- Memory & Recall (8 tests): N-Back, Digit Span, Corsi Block-Tapping, Visual Memory, Sequence Memory, and more—scored in digits, blocks, levels, or steps.
- Attention & Focus (7 tests): Stroop, Sustained Attention, Psychomotor Vigilance Task, Trail Making, Selective Attention—measured in ms, errors, or lapses.
- Motor Skill & Input Speed (6 tests): Click speed (CPS), spacebar speed (TPS), typing speed (net WPM), aim trainer, double-click speed.
- Processing Speed (5 tests): Mental Age, Digit Symbol Substitution, Symbol Search, Number Comparison, Mental Math.
- Logic & Problem Solving (6 tests): Common Sense, Pattern Recognition, Critical Thinking, Abstract Reasoning, Numerical Reasoning.
- Hearing & Audio (6 tests): Perfect Pitch, Relative Pitch, Frequency Hearing, Tone Deaf, Audio Memory.
Methodology & Transparency
- Clocks start when the stimulus actually reaches the screen, not when code schedules it.
- Responses < 100 ms are discarded as guesses.
- Scores use the median trial, not the best.
- Every result is placed against a published distribution with cited sources; norms require ≥ 1,000 samples before publication.
- Explicit disclaimer: "A measurement, not a diagnosis. Practice improves the task you practised. We will never tell you it makes you smarter."
