Table 2.
Correlation Matrix, Means, and Standard Deviations
| Constructs | Mean | SD | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|
| SUH | 6.35 | 3.25 | 1 | |||||||
| UST | 49.33 | 51.27 | 0.219** | 1 | ||||||
| SA | 3.33 | 0.79 | 0.280** | 0.164** | 1 | |||||
| IM | 4.30 | 1.45 | −0.105** | −0.013 | −0.058* | 1 | ||||
| BRM | 4.81 | 1.28 | −0.064** | 0.013 | −0.023 | 0.803** | 1 | |||
| SM | 3.65 | 1.14 | −0.050* | 0.033 | 0.065** | 0.683** | 0.645** | 1 | ||
| SE | 5.57 | 1.92 | −0.140** | −0.02 | −0.102** | 0.632** | 0.562** | 0.450** | 1 | |
| PA | 4548.46 | 2995.22 | −0.060* | −0.002 | −0.153** | 0.295** | 0.208** | 0.145** | 0.281** | 1 |
Note: *ҏ < 0.05, **ҏ < 0.01.
Abbreviations: SUH, smartphone usage hours; UST, unlock smartphone times; SA, smartphone addiction; IM, intrinsic motivation; BRM, body-related motivation; SM, social motivation; SE, physical activity self-efficacy; PA, weekly physical activity (MET- minutes); SD, standard deviation.