Books by Peter Tyrer

It is 1967. A mysterious disease appears in an English town. People fall down suddenly, poleaxed, and many die. Is it caused by a bacterium, a virus, a poison? Nobody knows.

This booklet will help guide readers through the crucial process of selecting the rating scales to use in research. Crucially, each scale is listed with its citation rate as a guide to its popularity among the research community and the potential comparability of results.