| MEASUREMENT PROPERTIES | |
| Limitations | <5 European languages (English) |
| Observations | |
| 1. RELIABILITY | |
| A. Internal Consistency | Tested |
| Cronbach's (Describe) |
PEPPI-5 showed high internal consistency (α=0.92) |
| B. Reliability intraobserver or test-retest | Tested |
| Continuous scores: intraclass correlation coefficient (ICC) Dichotomus: Cohen kappa (Describe) |
Test–retest reliability of the PEPPI-5 was just below the cut-off point for group level comparisons: ICC=0.68. Bland-Altman analysis LOA 6.83-6.35 (mean difference 0.24, t(99) = 0.71, P = 0.48) |
| C. Reliability interobserver or Measurement error | Tested |
| Standard error of measurement (SEM), smallest detectable change (SDC) or Limits of agreement (LoA) (Describe) |
LOA 6.83 to 6.35 differences -weakly related to the magnitude of the measurement (r2 = 0.04, P = 0.049), indicating little to no systematic bias. |
| 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 |
Confirmatory factor analysis demonstrated good fit for a unidimensional model of the PEPPI-5. With the exception of the RMSEA, which was above the cutoff value for good fit, CFA showed good fit indices for a 1-factor model of the PEPPI-5 (SB x2 (5) = 17.43, NNFI = 0.98, CFI = 0.99, SRMR = 0.03, RMSEA (90% CI) = 0.11 (0.05–0.16)). Standardized factor loadings ranged between 0.81 for item 1 and 0.92 for item 3 |
| C. Criterion validity | Not Tested |
| Comparison with a 'gold standard' Continuous scores: correlations, ROC curves Dichotomus: Sensitivity & Specificity (Describe) |
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