Examined whether the characteristics in perception of speech sounds found in preverbal hearing infants might extend to the perception of signed language in infants with congenital deafness. Seventeen Japanese mother-infant dyads participated in the study. Found that infants with deafness showed greater attentional and affective responsiveness to…

A 3-years-and-11-months-old Japanese girl showed delayed language development and emotional disturbance and was believed to suffer from maternal deprivation. A treatment program was developed consisting of three kinds of therapy: (1) nondirective play therapy; (2) language training; and (3) counseling for the mother. The language training involved…

This study investigated the effectiveness of a natural environment language training procedure that combined the mand-model procedure and the time delay procedure for the acquisition of noun signs and for the spontaneous use of the signs acquired. One autistic boy, aged 5 years, 4 months with no verbal imitation skills and few movement imitation…