Psychologists use diverse methods to study thought and behavior. Methods and Measurements highlights the different ways that psychology researchers ask questions and how they attempt to answer them. The methodologies include experiments that help assess cause and effect, correlational studies to show relationships among complex behaviors, questionnaires to evaluate attitudes and behaviors, observational studies to find out about naturally occurring behaviors, and other approaches. This new, full-color volume also discusses the ethics of doing research with people and how researchers have sometimes violated ethical standards as they subjected people to physical and psychological harm.