Teaching and learning about research methods is both challenging and great fun. This edition ofMethods in Behavioral Research maintains the features ofprevi­ ous editions that have been appreciated by both instructors and students. Clear communication of concepts using interesting examples is my highest priority. To enhance learning, I describe important concepts in several contexts through­ out the book; research shows that redundancy aids understand in g. I also empha­ size the need to study behavior using a variety of research approaches. Learning objectives precede each chapter; study terms and review and activity questions are included at the end of each chapter. Important terms are boldfaced in the text and defined in the glossary.