Table 3.
Construct Validity: Principal Components Analysis (Direct Oblimin)
| Variable | Factor 1 (Interference) | Factor 2 (Severity) | Corrected Item-Total Correlation | Cronbach’s α if Deleted | Communalities |
|---|---|---|---|---|---|
| Cronbach’s α | 0.867 | 0.818 | |||
|
| |||||
| Fatigue interference | |||||
| Relations | * .861 | .621 | .857 | 0.613 | |
| Enjoyment | * .787 | .651 | .848 | 0.611 | |
| Normal Work | * .779 | .746 | .830 | 0.672 | |
| Mood | * .759 | .649 | .848 | 0.599 | |
| General Activity | * .733 | .718 | .836 | 0.646 | |
| Walking | * .597 | .651 | .848 | 0.574 | |
| Fatigue severity | |||||
| Usual | * .872 | .791 | .645 | 0.835 | |
| Worst | * .847 | .688 | .760 | 0.743 | |
| Now | * .806 | .584 | .832 | 0.642 | |
| Eigenvalue | 4.834 | 1.101 | |||
| % Variance | 53.71% | 12.23% | |||
| % Cumulative Variance | 53.70% | 65.94% | |||
*
p < 0.05