Table 2 Overview of psychometric rating criteria
From: An updated protocol for a systematic review of implementation-related measures
Internal consistency | Indicates whether several items that purport to measure the same construct actually produce similar scores in the same test [26]. |
|---|---|
Convergent validity | Defined as the degree to which two constructs that are theoretically related are in fact related [26]. |
Discriminant (divergent) validity | Measures the degree to which two constructs that are theoretically distinct are in fact distinct [26]. |
Known-groups validity | Investigates whether distinct groups with differing characteristics can be differentiated [27]. |
Structural validity | Refers to the degree to which all test items rise and fall together, otherwise known as “test structure” [28]. |
Predictive validity | Refers to the degree to which a measure can predict or correlate with an outcome of interest measured at some point in the future [29] |
Concurrent validity | Assesses whether two measurements taken at the same time are correlated, and the measure under consideration is compared to an established measure of the same construct [29]. |
Responsiveness | Captures the ability of a measure to detect clinically important changes in the construct it measures over time [26] |
Norms | Measured by sample size, means, and standard deviations of measures and are meant to assess generalizability. |