Most children who are congenitally deafblind are severely delayed in their communication development and many will not achieve symbolic understanding and expression. This article discusses developmental markers cited in the research literature as predictive of or facilitative of the development of symbolism. These markers include the growth toward…

The Communication Observation Schedule (COS) records systematically the pragmatics of communication with children who have deaf-blindness and are functioning from the prelanguage to true words level. The COS provides the opportunity to record the purpose of an interaction, who initiates and who responds to it, the mode of response, and whether the…

This study evaluated the relationship between the play behaviors of 18 deaf blind children (aged 3-12) and their communication skills using the Play Assessment Scale and several multidomain developmental checklists. Results revealed that behaviors observed during play assessment were highly related to ratings of receptive, expressive, and…

Small-set segmental identification experiments were conducted with three deaf-blind subjects who were highly experienced users of the Tadoma method. Systematic variations in the positioning of the hand on the speaker's face for Tadoma produced systematic effects on percent-correct scores, information transfer, and perception of individual…

Experienced deaf-blind users (N=10) of sign language tested their ability to receive signed messages including isolated signs and sentences. A set of 122 isolated signs was received with an average accuracy of 87%. Signed sentence reception accuracy ranged from 60-85%, with errors accounted for primarily by deletions and phonological or…