Stroop Challenge Go

Stroop Challenge is a precision cognitive training tool based on the Stroop Effect — one of the most replicated findings in experimental psychology — measuring interference between word reading and color recognition.

THE SCIENCE:
The Stroop Effect demonstrates that automatic processing (word reading) can interfere with controlled processing (color identification). Regular exposure to Stroop-type stimuli has been associated with improved selective attention, cognitive flexibility, and processing speed.

TWO VALIDATED MODES:
• Classic (Color-Naming) — Identify the ink color of the presented word. Suppresses automatic reading response.
• Word Match (Word-Reading) — Identify the color named by the word. Tests semantic processing independence.

METRICS TRACKED:
• Score per round (accuracy × speed composite)
• Best accuracy rate (percentage of correct responses)
• Fastest average reaction time (milliseconds per response)
• Session totals: rounds played, correct and incorrect responses
• Combo chains: consecutive correct responses

DIFFICULTY SCALING:
• Easy: 4 color stimuli (Red, Blue, Green, Yellow)
• Medium: 5 color stimuli (adds Purple)
• Hard: 6 color stimuli (adds Orange)

DATA PRIVACY:
All data is stored locally via UserDefaults. No network requests are made. No personal information is collected, transmitted, or shared. The app functions completely offline.

Ideal for daily cognitive warm-up, focus training, or simply exploring one of psychology's most fascinating phenomena.