OM book glossary

This is the glossary for the book “Outcome measures and evaluation in counselling and psychotherapy” written by myself and Jo-anne Carlyle and available now from SAGE. I am over 430 entries now and still climbing though now (April 2026) I am concentrating more on harmonising, cleaning up and cross-linking existing entries than I am on adding new ones. 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 if you are searching, the way that the plugin 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 word or phrase you typed in to find is hidden further down the list of suggestions. As of 29.ix.26 the plugin authors are aware and working on this.

As to the content, if a topic 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!

H

Hamilton sampling

This is an esoteric one but it's basically a method to try to make population…

Health Economics

Personal introduction! I have been putting off writing this entry for ages! Like a number…

Hedges's g

An effect size measure that has really, or should have, replaced Cohen's d as it…

Heteroscedasticity

This is a bit geeky but you might come across it in research papers. …

Hierarchical factor models

A specific set of factor analytic models these days always conducted using a confirmatory factor…

Hierarchical linear models/modelling (HLM)

Synonym of multi-level modelling. Dates Created 6/11/21.

Histograms and barplots

A plot that plots the counts of observed values for a variable against the values….

Holm-Bonferroni method

Also known as the Holm-Bonferroni correction or just the Holm method/correction. This is an…

Homoscedasticity

Homoscedasticity is the property that the variances of a continuous variable is the same in…

Hospital Anxiety and Depression Scale (HADS)

A 14 item self-report questionnaire (Zigmond, A. S., & Snaith, R. P. (1983). The Hospital…

More

Creation date lost, last updated 19.ix.26. Author CE; this page and all glossary contents are copyright to me so contact me if you want to quote from them (I’m sure I’ll agree!). That may change to a Creative Commons licence later when I am happier with the content.