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| Main themes | Subthemes | Brief explanations for each subthemes |
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| Engaging activity | Directing attention to activity | To direct one’s attention and to show an interest to activity from a gaze, utterance, and an expression |
| Initiating activity | To initiate an activity of one’s own will or to initiate it after invitation without refusal to an activity |
| Continuing activity | To continue an activity for a long time |
| Concentrating on activity | To concentrate on an activity with serious expression and innocence |
| Expressing skill and knowledge | To express knowledge or to explain it to others |
| Trying new things during activity | To change the posture, or make a task and a role in an activity and to try a new thing during an activity |
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| Emotion during activity | Expressing delight during activity | To smile or be glad without severe expression |
| Being calm through activity | To be clam or relaxed without anxiety or poise |
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| Expression during activity | Increasing utterance | To increase amount of words or to speak fluently |
| Reminiscing | To recall the past and to do a reminiscence |
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| Social interaction through activity | Starting social interaction | To be interested in others, for example, to gaze others and to try to communicate with them |
| Sharing an activity with other people | To do something with others or to share place or activity with others |
| Teaching other people | To engage in an activity as a role of teaching someone knowledge and skills |
| Considering other people | To consider others, to do something for them, and to thank others during activity |
| Expressing themselves to other people | To express one’s feeling or opinion in words to others |
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| Something obtained as outcome of activity | Expressing a sense of capability | To confirms one’s own ability or to show sense of capability about results of the activity |
| Expressing satisfaction | To indicate satisfaction to a result of the activity and praise from others |
| Attracting next activities | To show the sign which looks forward to the next activity, to plan the next activity, or to begin different activity of one’ will continuously |
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