Table 1.
The summary of measurement in this study.
Table 2.
Descriptive statistics of happiness expression and single-time measurements.
Fig 1.
Correlation between happiness expression and single-time engagement measurement result.
Table 3.
Descriptive statistics of happiness expression and real-time measurements.
Fig 2.
Correlation between happiness expression and real-time engagement measurement results.
Fig 3.
Contrasting Real-Time Results of Happiness Expression, Classroom Observation, and Student Self-Reports.