Table 4.
Reliability, test–retest, and systematic differences in motivation and confidence questions from the CAPL-2 battery assessment.
| MC | Test (n = 69) | Retest (n = 69) | Reliability test | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M | SD | Item-total correlation | M | SD | Item-Total Correlation | Cronbach’s α | ICC (95% CI) |
Value of p† | SEM | %SEM | MDC | MDR% | |
| Item 1 | 2.27 | 0.52 | 0.518** | 2.28 | 0.51 | 0.436** | 0.914 | 0.844 | 0.770 | 0.20 | 8.9 | 0.56 | 24.8 |
| Item 2 | 2.27 | 0.55 | 0.396** | 2.24 | 0.55 | 0.337** | 0.900 | 0.820 | 0.444 | 0.23 | 10.3 | 0.65 | 28.6 |
| Item 3 | 2.25 | 0.60 | 0.497** | 2.17 | 0.60 | 0.364** | 0.940 | 0.881 | 0.027 | 0.21 | 9.4 | 0.57 | 25.9 |
| Predilection | 6.79 | 1.21 | 0.772** | 6.69 | 1.25 | 0.734** | 0.934 | 0.920 | 0.890 | 0.35 | 5.2 | 0.96 | 14.3 |
| Item 1 | 2.19 | 0.56 | 0.474** | 2.25 | 0.49 | 0.566** | 0.874 | 0.775 | 0.207 | 0.25 | 11.2 | 0.69 | 31.0 |
| Item 2 | 2.07 | 0.63 | 0.692** | 2.03 | 0.63 | 0.686** | 0.933 | 0.875 | 0.287 | 0.22 | 10.9 | 0.62 | 30.2 |
| Item 3 | 2.07 | 0.67 | 0.523** | 2.07 | 0.62 | 0.677** | 0.943 | 0.894 | 0.903 | 0.21 | 10.1 | 0.58 | 28.1 |
| Adequacy | 6.56 | 1.02 | 0.773** | 6.35 | 1.28 | 0.875** | 0.713 | 0.549 | 0.118 | 0.78 | 12.0 | 2.15 | 33.3 |
| Item 1 | 2.19 | 0.41 | 0.592** | 2.21 | 0.42 | 0.525** | 0.903 | 0.823 | 0.467 | 0.18 | 8.0 | 0.49 | 22.2 |
| Item 2 | 2.21 | 0.38 | 0.601** | 2.22 | 0.37 | 0.529** | 0.831 | 0.713 | 0.670 | 0.20 | 9.0 | 0.55 | 25.0 |
| Item 3 | 2.16 | 0.47 | 0.602** | 2.17 | 0.48 | 0.551** | 0.936 | 0.881 | 0.796 | 0.16 | 7.6 | 0.46 | 21.1 |
| Intrinsic Motivation |
6.56 | 1.02 | 0.773** | 6.60 | 1.06 | 0.673** | 0.945 | 0.896 | 0.446 | 0.34 | 5.1 | 0.93 | 14.1 |
| Item 1 | 1.78 | 0.51 | 0.676** | 1.90 | 0.49 | 0.654** | 0.919 | 0.836 | 0.007 | 0.20 | 11.0 | 0.56 | 30.5 |
| Item 2 | 1.77 | 0.61 | 0.683** | 1.80 | 0.57 | 0.684** | 0.931 | 0.871 | 0.317 | 0.21 | 11.9 | 0.59 | 33.1 |
| Item 3 | 2.04 | 0.54 | 0.643** | 2.05 | 0.47 | 0.672** | 0.932 | 0.874 | 0.637 | 0.18 | 8.8 | 0.50 | 24.4 |
| Physical Activity Competence | 5.60 | 1.45 | 0.816** | 5.75 | 1.33 | 0.801** | 0.948 | 0.898 | 0.057 | 0.45 | 7.8 | 1.23 | 21.7 |
| Total MC domain score | 25.29 | 3.93 | N/A | 25.74 | 4.68 | N/A | 0.908 | 0.932 | 0.141 | 1.12 | 4.4 | 3.11 | 12.2 |
MC, motivation and confidence; M, mean; SD, standard deviation; 95% CI, confidence interval of 95%; ICC, intraclass correlation coefficient; SEM, standard error of measurement; %SEM, standard error of measurement as a percentage; MDC, minimum detectable change; N/A, not applicable; †Friedman test value of ps; **p < 0.01 for item-total correlation. Item-total correlation refers to the magnitude of the association between each item and its domain.