Table 2: Internal consistency and ICC values across the four measurements.

DREEMCronbach’s alpha value ICC
valuea
Time 1 Time 2Time 3Time 4Average

Overall 0.91 0.92 0.93 0.94 0.93 0 . 6 7
Students’ Perception of Learning (SPoL) (12 items) 0.81 0.83 0.84 0.82 0.83 0 . 6 1
Students’ Perception of Teachers (SPoT) (11 items) 0.65 0.75 0.72 0.73 0.71 0 . 6 0
Students’ Social Self-Perception (SSSP) (7 items) 0.51 0.36 0.45 0.47 0.45 0 . 5 1
Students’ Academic Self-Perception (SASP) (8 items) 0.76 0.80 0.76 0.78 0.78 0 . 6 2
Students’ Perception of Atmosphere (SPoA) (12 items) 0.79 0.79 0.83 0.85 0.82 0 . 6 1

aICC analysis (single measure) between Time 1, Time 2, Time 3, and Time 4.
** 𝑃 < 0 . 0 0 1 .
Average of Cronbach’s alpha was referred to mean Cronbach’s alpha of the four measurements.