OMbook_glossary

This is a mapping of the discrimation achieved using different cutting points along the range...

This has been a very influential model for the analysis of responses to multi-item. ...

The RCADS was originally a 47 item self-report scale for young people aged 8 to...

Probably more correctly "Rorschach projective test". The use of a standard set of ten...

Just another name and acronym for the RCI: Reliable Change Index. In general, I...

Rank correlation coefficients are ways of looking at correlations between variables, i.e. the systematic relationship...

Censored data (see entry) is data where at least some values are not know accurately...

Also, fairly sensibly, known as "restriction of range". Covers what can happen when the...

It's what it says and I think a recent movement not to separate the two,...

What it says really: the idea that, as far as possible, researchers should hold a...

This is one of those entries that is so "it's what it says" that it...

A six item measure, with versions for therapist and client, that aims to rate the...

Back in 1984 when I started in this field "RDBMS" I suspect didn't appear in...

It's doing what you say you're going to do isn't it? Yes, and I like...

Usually seen as "repeated measure test". About measurements repeated within participants, e.g. change in...

In psychoanalytic/psychodynamic theory when one slips into an chronologically, developmentally earlier way of functioning as...

Exactly what it says: a dataset that has a rectangular format in which all the...

Is exactly what it says: finding some way, for at least one person, of identifying...

[Historically, the RCI was the RCI (doh!), recently it has been called the RCC: Reliable...

All statistical "tests" and analyses beyond the very simplest descriptive methods are really looking at...

Synonym of Multilevel Models/Modelling.

Or the "The R Project for Statistical Computing" to give it its full title. An...

Ranking is what it says! If you have a set of scores you can...

We like the 2002 NHS definition: Research can be identified as the attempt to derive generalisable...

Repertory grids are an idiographic measurement system. The grid in the name is just that:...

An experimental design comparing two or more groups which attempts to reduce the impact of...

Randomisation, or "random allocation" is at the heart of the randomised controlled trial and a...

This is about Stevens' typology of scales and most of the time it's a red...

More of a narrative label than a particularly useful summary statistic though it is one:...

The ReQoL-20 and short form, ReQoL-10, are quality of life self-report questionnaire measures developed by...