The article is 100% about passive vs active studying and approximately 0% about repetition. Repetition is briefly touched on by pointing out that if you're 100%

The article is 100% about passive vs active studying and approximately 0% about repetition. Repetition is briefly touched on by pointing out that if you're 100% passively receiving information, then repetition doesn't help. The effect of repetition on active study is never brought up.