The children with Rett syndrome do not relatively receive attention because of their low prevalence rate compared
with other disabled children, and there are few studies on communication intervention with them. Hence, the object of
this study was to investigate the possibility of using therapeutic music activities for communication intervention with
Rett syndrome children. It also noted whether the communication competence through the receptive language occurring
during therapeutic music activities will increase that through the receptive language occurring during free-play time.
The subject was a child with Rett Syndrome, a third grader in the primary grade department at S School located in
Busan, who goes to N Nursery School for the disabled only after school, and uses changes of breathing patterns,
changes of body location, eye-gaze, facial expressions, gestures, and pointing as communication menas. The research
period was from March 15th to April 10th in 2010, and the research comprised 21 sessions in total for 6 weeks: 3
sessions for baseline and 18 sessions for intervention 4 - 5 times a week, and after a week-hiatus from the date
when the treatment was finished, an assessment of the maintenance step was conducted 3 times for a week. The
experiment design was a single subject multiple baseline design, and in the observation of the baseline, the child's
communication competence was observed during the free-play time when the intervention program using music was not
conducted. To observe whether communication skills are also maintained a week after the music intervention was
finished, it was observed for 5 minutes over the 3 sessions during the free-play time under the same condition as the
baseline a week after the intervention was finished. From this study, the following conclusion was drawn. First, it was
found that therapeutic music activities improved Rett syndrome children's communication competence through their
receptive language. Second, it was found that therapeutic music activities improved Rett syndrome children's
communication competence through their receptive language during free-play time. Third, it was found that there was
an interrelationship between therapeutic music activities and communication competence through the receptive language
of Rett syndrome children during free-play time. In conclusion, children with Rett syndrome have a strong will to
communicate with the people with whom they have established relationships, are responsive to music and very
self-motivated. In combination with this, it showed that therapeutic music activities could be an intervention method
to improve the communication competence of the children with Rett syndrome.