Abstract
This study describes the communicative behaviors of a nonspeaking girl with cerebral palsy who utilized a communication board of letters. Observation of her communicative interactions in one day revealed the following facts. (1) She often used the communication board of letters, but she sent few messages by the board. (2) The communication board of letters played an important role in terms of information transfer and initiations of topics in communicative interactions. (3) There were some situations where the girl was not able to use the board because it was not located within her reach. (4) She utilized the board little in group sessions. (5) There were only a few occasions when she initiated a topic and dominated a conversation.
