| Student | Classroom | Indices of happiness operational definition |
| 1 | A | Smiling, laughing, maintaining eye gaze, vocalizing, reaching out with left hand, and engaging in rocking |
| 2 | A | Smiling, laughing, maintaining eye gaze, vocalizing, relaxing extremities, and turning her head towards a person/activity while opening her mouth |
| 3 | B | Smiling, laughing, maintaining eye gaze, vocalizing, raising her arms, remaining calm, and relaxing extremities |
| 4 | B | Smiling, laughing, maintaining eye gaze, vocalizing, relaxing extremities, and turning head toward activity |
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