Table 2 Recommendations for test development
Psychometric properties | ||
|---|---|---|
Validity (i.e. does the task measure what it is intended to measure?) | Content validity Construct validity Sensitivity and specificity (according to the examination issue) Predictive validity Cross-cultural validity (including multiple language versions for verbal tests) | Clinical relevance Definitions updating according to most recent neuroscientific evidence Highly sensitive to early phases of dementia; differential diagnosis among dementias Change monitoring over time Minimal effects of literacy |
Reliability | Test/re-test stability; inter-rater reliability | Avoid practice effects; parallel forms; avoid floor- and ceiling effects |
Feasibility | Balance between economic and human resources costs. Availability of normative data across European countries | Optimise administration time; minimise discomfort to the patient |