[Bosanski] Pravilo od 85%

# The 85% Rule: Why Getting Everything Right (Or Wrong) Kills Learning [Bosnian content summary] Psychologist Robert Björk's research proves 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 as unimportant. Too hard (55%) and frustration kills engagement. At 85%, learners experience "desirable difficulty" — challenging but achievable. Neuroimaging shows prefrontal cortex fully engaged. Dopamine activates during errors, strengthening memory. Amal's HLR adaptive system continuously monitors accuracy and adjusts difficulty, maintaining each child in this optimal 85% zone.