Some reservations about the use of the analysis of co-variance in educational research: A response to Dugard and Todman

Dugard and Todman (this issue), in this journal, present convincing arguments for the greater utilisation by educational researchers of the analysis of co-variance when analysing data from experiments employing pre-test-post-test control group designs. We applaud this initiative, but caution against too readily employing co-variance procedures where it may be inappropriate to do so and repeat some of the cautions concerning ‘pitfalls for the unwary’ previously voiced (Lambourne & Wheldall, 1979). Copyright © 1995 Carfax Publishing Ltd.