Jackson, Sherri L., 1962- Research methods and statistics : a critical thinking approach / Sherri L. Jackson. - 4th ed. - [Belmont, Calif.] : Wadsworth Cengage Learning, c2012. - xviii, 510 p. : ill. (some col.) ; 24 cm. includes index ISBN: 9781111346584 (Hardcover) 1111346585 (Hardcover) Subjects--Topical Terms: Psychology--Research--Methodology.Psychometrics.Psychology--Statistical methods.