Table 1.
COSMIN domains, psychometric properties, aspects of psychometric properties and similar terms based on Mokkink et al. (2010c).
| Domain | Psychometric property (definition) | Examples of terms used outside of COSMIN that may relate to measurement property |
|---|---|---|
| Reliability | Internal consistency (The degree of the interrelatedness between items) | Internal reliability Content sampling Conventional item analysis |
| Reliability (Variance in measurements which is because of “true” differences among clients) | Inter-rater reliability Inter-scorer reliability Test-retest reliability Temporal stability Time sampling Parallel forms reliability |
|
| Measurement error (Systematic and random error of a client's score that is not due to true changes in the construct to be measured) | Standard Error of Measurement | |
| Validity | Content Validity (The degree to which the content of an instrument is an adequate reflection of the construct to be measured) | n/a |
| Construct validity (The degree to which scores are consistent with hypotheses based on the assumption that the instrument validly measures the construct to be measured) | n/a | |
| Aspect of construct validity—structural validity (The degree to which scores reflect the dimensionality of the measured construct) | Internal structure | |
| Aspect of Construct validity—hypothesis testing (Item construct validity) | Concurrent validity Convergent validity Predictive validity Discriminant validity Contrasted groups validity Identification accuracy Diagnostic accuracy |
|
| Aspect of Construct validity-Cross cultural validity (The degree to which the performance of the items on a translated or culturally adapted instrument are an adequate reflection of the performance of the items of the original version of the instrument) | n/a | |
| Criterion validity (The degree to which scores reflect measurement from a “gold standard”) | Sensitivity/specificity (when comparing assessment with gold-standard) | |
| Responsiveness | Responsiveness (The ability to detect change over time in the construct to be measured) | Sensitivity/specificity (when comparing two administrations of an assessment) Changes over time Stability of diagnosis |
| aInterpretability | Interpretability (The degree to which qualitative meaning can be assigned to quantitative scores obtained from the assessment) | n/a |
a
Interpretability is not considered a psychometric property.