[فارسی] قانون 85 درصد

# The 85% Rule: Why Getting Everything Right (Or Wrong) Kills Learning [Persian 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 treats it as unimportant. Too hard (55%) and frustration dominates. At 85%, learners experience optimal challenge. This is called "desirable difficulty." Error detection activates dopamine, strengthening memory. Neuroimaging shows prefrontal cortex fully engaged at 85%. Amal's HLR adaptive system continuously monitors accuracy and adjusts difficulty, maintaining each child in this optimal 85% learning zone.