First steps in research and statistics : a practical workbook for psychology students / Dennis Howitt and Duncan Cramer. Howitt, Dennis. Cramer, Duncan. Psychology Research Methodology. Psychometrics. BF76.5 .H69 2000 150.72 HOF Includes bibliographical references (p. [280]) and index. Philadelphia : Routledge, 2000. 2000. 2000 Text xvi, 284 p. : http://www.loc.gov/catdir/enhancements/fy0649/99038285-d.html eng