OM book glossary

This is the glossary, over 350 entries and climbing, for the book “Outcome measures and evaluation in counselling and psychotherapy” written by myself and Jo-anne Carlyle and available now from SAGE. Some glossary entries link to more detailed expansions of the topic in my Rblog and, at last, an increasing number now link with interactive online (“shiny”) apps.

You can see the alphabetical list of entries below which is a good place to browse, or you can use this search box.

Beware: the way the search orders the matches is to my mind bizarre so scroll down if what you typed isn’t first on the list, you may find something with exactly the title that is exactly the phrase you typed in to find is hidden down the list of suggestions.

If what you want is not there and you think it should be, contact me and tell me and I will put it on the (long!) list of entries to be added!

I

Item cueing

This is about whether an item in a multi-item self-report questionnaire is cued negatively, e.g….

Internal reliability / consistency

There's a sometimes heated debate about whether the term "consistency" is or isn't more appropriate…

Item response theory (IRT)

Oversimplifying only a little, IRT, with Classical Test Theory (CTT), makes the two main, and…

Intervals: terminology and symbols

This is a little bit esoteric and mathematical perhaps but I keep forgetting the symbols Details An…

Interval censored data

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

Imputation

No, not when someone imputes malevolent intention to your attempt to help! In research…

Intercept

The intercept, with the slope, define a linear regression. Details It's just this point (in the plot…

Interview measures

What it says: an interview that produces a measure score, or, reifying things a bit,…

Intention to treat (ITT) analyses

You may come across this in reports of controlled trials of therapies (or of anything…

IPD: Individual Participant/Patient Data

You may hit this term in systematic review and meta-analyses. It's the latest, and…

More

Creation date lost, updated 19.v.24 to add the new BetterDocs “encyclopedia” listing of entries, tweaks 22.i.25. Author CE, page and all glossary contents are copyright to me. That may change to a Creative Commons licence later when I am happier with the content.