| MEASUREMENT PROPERTIES | |
| Limitations | >=5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
Guttman scale coefficients for scalability >0.6. The Guttman scale coefficients for reproducibility are >0.9. Internal consistency via Cronbach's alpha >0.60 for each of the 9 sections. |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
The test-retest correlations between 2 administrations over a 2-week period in several studies are >0.80. |
| 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 | Tested |
| Expert opinion (relevance and comprehensiveness) (Describe) |
Items in AIMS are based on the content of the Rand Health Survey Questionnaires, the Quality of Well-Being Scale, and Katz's Index of Activities of Daily Living. Items on dexterity and pain were added. |
| B. Construct Validity: Structural validity |
Tested |
| Hypotheses-testing | Tested |
| Cross-cultural validity | Not Tested |
| Brief Description |
Factor analysis identified 3 factors (physical function, psychological, and pain), which have been replicated in subsequent studies. |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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