This edition: Developmental Study as a Science
This lesson introduces the student to research methodology—how scientists explore and gain knowledge to understand human development. To illustrate how developmental psychologists have used the scientific method, the lesson traces the evolution of attachment research, including research studies by Harry Harlow, Mary Ainsworth, and Mary Main. Students are introduced to research design and learn how researchers use observational studies and surveys to establish a relationship between the variables—or behaviors and characteristics—that they decide to investigate. The lesson considers the ethics of conducting and reporting scientific research and emphasizes the importance of approaching questions and problems and testing ideas and theories from many different perspectives.