Well, they took, over a three-month period, D-level students, gave them A's, told them they were \"A's,\" told them they were bright, and at the end of this three-month period, they were performing at A-level.
Selama tiga bulan lebih kelompok D diberi nilai A diberitahu bahwa mereka berbakat dan ketika masa 3 bulan lewat mereka berprestasi bak kelompok A