## Glossary

- Rasch partial credit modelitem response theory model where responses to items can be classified as correct, incorrect, or one or more levels of partial correctness
- reliabilitystatistic that indicates the consistency of a score or estimate; under classical test theory, it is an estimate of the proportion of overall variance that is due to the variance of the construct of interest; depending on the context, it might have other meanings, but in general it ranges between 0 and 1
- reliability replication methodsmethods generally used to estimate variance where parts of the data are systematically removed or eliminated from the calculations; results from these replicated samples are then compared with results obtained from the entire sample to arrive at the statistic of interest
- RUFrestriced use files