Conceptually based vocabulary intervention: second graders' development of vocabulary words.

An instructional strategy was investigated that addressed the needs of deaf and hard of hearing students through a conceptually based sign language vocabulary intervention. A single-subject multiple-baseline design was used to determine the effects of the vocabulary intervention on word recognition, production, and comprehension. Six students took part in the 30-minute intervention over 6-8 weeks, learning 12 new vocabulary words each week by means of the three intervention components: (a) word introduction, (b) word activity (semantic mapping), and (c) practice. Results indicated that the vocabulary intervention successfully improved all students' recognition, production, and comprehension of the vocabulary words and phrases.