Are effect sizes and confidence levels problems for or solutions to the null hypothesis test?

Authors
Citation
Aj. Riopelle, Are effect sizes and confidence levels problems for or solutions to the null hypothesis test?, J GEN PSYCH, 127(2), 2000, pp. 198-216
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psycology
Journal title
JOURNAL OF GENERAL PSYCHOLOGY
ISSN journal
0022-1309 → ACNP
Volume
127
Issue
2
Year of publication
2000
Pages
198 - 216
Database
ISI
SICI code
0022-1309(200004)127:2<198:AESACL>2.0.ZU;2-Y
Abstract
Some have proposed that the null hypothesis significance test, as usually c onducted using the t test of the difference between means, is an impediment to progress in psychology. To improve its prospects, using Neyman-Pearson confidence intervals and Cohen's standardized effect sizes, d is recommende d. The purpose of these approaches is to enable us to understand what can a ppropriately be said about the distances between the means and their reliab ility. Others have written extensively that these recommended strategies ar e highly interrelated and use identical information. This essay was written to remind us that the t test, based on the sample-not the true-standard de viation, does nor apply solely to distance between means. The t test pertai ns to a much more ambiguous specification: the difference between samples, including sampling variations of the standard deviation.