[中文] 85%规则

# The 85% Rule: Why Getting Everything Right (Or Wrong) Kills Learning [Chinese content summary] Psychologist Robert Björk's research shows learning is optimized at 85% accuracy. Material learned at this level is retained 50-70% longer than at 95%. Too easy (95%) and brain ignores it. Too hard (55%) and frustration kills engagement. At 85%, learners experience optimal challenge called "desirable difficulty." Error detection activates dopamine, strengthening memory. Neuroimaging shows prefrontal cortex fully engaged. Amal's HLR adaptive system continuously monitors accuracy and adjusts difficulty, keeping each child in this optimal 85% zone.