Howitt, Dennis An introduction to statistics in psychology / Dennis Howitt, Duncan Cramer - 3rd ed. - Harlow, England : /Pearson/Prentice Hall, 2005 - xxiii, 488 p. : ill. ; 25 cm. Includes bibliographical references (p. [479]) and index ISBN: 0131399853 RM160.36 Subjects--Topical Terms: Psychometrics