Table 3.
Physical activity mediator scales
| Variables | Description and example items | Range (No. of items) |
ICC (95% CI) |
α | χ2 | df | p | GFI | RMSEA |
|---|---|---|---|---|---|---|---|---|---|
| Physical activity mediators | |||||||||
| Self-efficacy | Confidence in ability to adopt, maintain and overcome barriers to PA behaviors. For example: "I can still find the time to be physically active even when I've had a busy day". | 1-6 (5) |
0.91 (0.88 to 0.93) |
0.69 | 3.82 | 5 | 0.58 | 0.99 | 0.00 |
| Environmental perceptions | An individual's mental representation of their environment that may influence their PA behavior: | ||||||||
| • Home environment - For example: "At home I have access to equipment that helps me to be physically active - e.g. bikes, balls, skateboards". | 1-6 (3) |
0.88 (0.83 to 0.91) |
0.63 | 11.22 | 8 | 0.19 | 0.98 | 0.05 | |
| • School environment - For example: "At school, facilities are available during recess/lunch for me to be physically active - e.g. the gym, dance studio, sports equipment". | 1-6 (3) |
0.85 (0.79 to 0.89) |
0.65 | 11.22 | 8 | 0.19 | 0.98 | 0.05 | |
| Social support | Social influences that reinforce PA through encouragement and role modeling: | ||||||||
| • Peer support - "...how often did you make plans with your friends to be physically active together?' | 1-5 (4) |
0.91 (0.88 to 0.94) |
0.78 | 27.40 | 19 | 0.10 | 0.97 | 0.05 | |
| • Family support - For example: "... how often did members of your family participate in physical activities/sports with you?" | 1-5 (4) |
0.86 (0.81 to 0.90) |
0.74 | 27.40 | 19 | 0.10 | 0.97 | 0.05 | |
| Behavioral strategies | Self-reinforcement for PA achieved through setting goals, monitoring behavior and self-reward. For example: "...did you organize to be physically active with a friend or family member?" | 1-5 (6) |
0.91 (0.88 to 0.93) |
0.79 | 15.45 | 9 | 0.16 | 0.97 | 0.07 |
| Outcome expectations | Anticipated outcomes of PA such as the benefits. For example: "Participation in regular physical activity can help me to improve my fitness". | 1-6 (5) |
0.82 (0.75 to 0.86) |
0.75 | 11.26 | 5 | 0.03 | 0.97 | 0.09 |
| Outcome expectancies | The value placed on anticipated outcomes of PA. For example: "How important is improving your fitness to you?" | 1-4 (5) |
0.88 (0.83 to 0.91) |
0.66 | 15.74 | 5 | 0.01 | 0.97 | 0.11 |
| Intentions | Intention to be physically active. | 1-4 (1) |
0.79 (0.72 to 0.85) |
NR | NR | NR | NR | NR | NR |
Note. ICC = Intra class correlation for 2-week test-retest reliability; α = Cronbach alpha; χ2 = Chi-square; df = degrees of freedom; p = probability; GFI = goodness of fit index; RMSEA = root mean square of approximation; NR = Not relevant.