[Русский] Правило 85 процентов

# The 85% Rule: Why Getting Everything Right (Or Wrong) Kills Learning [Russian 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 material at 95%. Too easy (95%) and brain treats it as unimportant. Too hard (55%) and frustration kills engagement. At 85%, learners experience optimal challenge. Neuroimaging shows the prefrontal cortex is fully engaged, dopamine activates during errors. This is called "desirable difficulty." Amal's HLR adaptive system continuously monitors accuracy and adjusts difficulty, keeping each child in this optimal 85% zone for maximum learning.