| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
The subscales showed adequate internal consistency. Pain avoidance (α = .80), activity avoidance (α = .73), task-contingent persistence (α = .83), excessive persistence (α = .73), pain-contingent persistence (α = .82), pacing to increase activity (α = .76), pacing to conserve energy (α = .83), and pacing to reduce pain (α = .76) |
| B. Reliability intraobserver or test-retest | Not Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
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| C. Reliability interobserver or Measurement error | Not Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
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| 2. VALIDITY | |
| A. Content validity: face validity | Not Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
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| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
A 6-factor structure showed acceptable fit indices (standardized root mean square residual=0.062; root mean-square error of approximation=0.066; comparative fit index=0.908). The highest significant relationships for health outcomes was between activity avoidance and FM impact (r=0.36) and excessive persistence and negative affect (r=0.41). |
| C. Criterion validity | Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
The association between the 8 APS subscales and the POAM-P subscales was examined. Because the APS contains some items in common with the POAM-P, the items in common were eliminated from the POAM-P and the correlations between the APS and the POAM-P were calculated. High correlations in the expected direction were found between the APS and POAM-P subscales. |