Table 4 Internal Consistency and Factor Analysis Tests with Baseline, 6-month, and 12-month Data
From: Psychometrics of the self-efficacy for physical activity scale among a Latina women sample
| Â | Original Scale (Baseline) | Collapsed Scale (Baseline) | ||
All Five Items | Vacation Dropped | All Five Items | Vacation Dropped | |
Cronbach’s Alpha | .72 (95% CI .62–.82) | .70 (95% CI .58–.82) | .71 (95% CI .61–.81) | .67 (95% CI .54–.79) |
Highest Factor Loading: Item 1 (Tired) | .72 | .80 | .68 | .77 |
Lowest Factor Loading: Item 4 (Vacation) | .54 | – | .63 | – |
| Â | Original Scale (6-months) | Collapsed Scale (6-months) | ||
All Five Items | Vacation Dropped | All Five Items | Vacation Dropped | |
Cronbach’s Alpha | .76 (95% CI .67–.85) | .78 (95% CI .68–.88) | .76 (95% CI .67–.85) | .75 (95% CI .64–.86) |
Highest Factor Loading: Item 1 (Tired) | .86 | .94 | .81 | .87 |
Lowest Factor Loading: Item 4 (Vacation) | .4 | – | .54 | – |
| Â | Original Scale (12-months) | Collapsed Scale (12-months) | ||
All Five Items | Vacation Dropped | All Five Items | Vacation Dropped | |
Cronbach’s Alpha | .78 (95% CI .69–.87) | .80 (95% CI .70–.90) | .78 (95% CI .69–.87) | .79 (95% CI .69–.89) |
Highest Factor Loading: Item 1 (Tired) | .89 | .95 | .92 | .97 |
Lowest Factor Loading: Item 4 (Vacation) | .42 | – | .42 | – |