FORMATION OF THE PREPARATORY SET IN THE MENTALLY RETARDED CHILDREN : ON THE ACQUISITION OF THE ROLE OF THE WARNING SIGNAL THROUGH PRELIMINARY VERBAL INSTRUCTION 論文 Toshihide Koike・Yutaka Matsuno ·1982-01-01 ·『The Japanese Journal of Special Education』 20(2) pp. 1-9 doi:10.6033/tokkyou.20.1_2