title: Statistics Commentary Series: Commentary #12-One--Tailed and Two-Tailed Tests.
authors.affiliation: From the Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton; and Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
authors.forename: David L
authors.initials: DL
authors.lastname: Streiner
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans