The aim of this study was to examine the effects of a Dohsa-hou intervention package on the development of joint attention in a student with severe autism. The subject was a first grader enrolled in elementary special support school, who was 10 months, namely the behavior following stage on the joint attention score. The subject participated in the intervention package for 11 sessions. The package consisted of Dohsa-hou, shaping mand on both body touching play and playing catch, and a joint action routine in the form of role-playing between a salesperson and a customer. The subjects’ mother performed a similar intervention program with the child at home for a total 20 sessions as part of this study. The dependent variables were evaluated according to the joint attention score and the differences in the personal interactions of the subject between the baseline and the evaluation phase. Progressive measurements of independent variable of the program were the increase in eye contact during Dohsa-hou and playing catch, the percentage of mands completed, and the percentage of correct answers during role play. Progress was measured in terms of whether the subject could accurately perform additional action tasks and engaged in more eye contact with the trainer in Dohsa-hou, or engage in actions such as teasing and referential looking. During play, the subject was able to make requests almost 100% of the time. The subject was able to catch and throw a ball to the trainer while looking at her. In the joint action routine, the subject was eventually able to complete almost 100% of the role play, and was able to play the roles of customer and salesperson accurately. On the joint attention score, the subject advanced by 15 months, namely to the symbol formation stage. These results were discussed from the issue of the development of joint attention by the Dohsa-hou and social interaction, as well as the effects of the Dohsa-hou intervention package involved in family.
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