Answer:
It's supposed to work in theory, but actually only affects young pariahs. The other percentages of adolescents waive cognitive development for social interaction, a sense of belonging, procreation, recreational drug use or even try to save it for college or med school, where (unbeknownst to them) it will already be too late for frivolous things such as "cognitive development."
Pity, only deeply disturbed adolescents seem to possess the condition called "cognitive development."