Dr. Bonet is conducting a study that examines cognitive abilities and aging. She includes four groups of participants: 20–29, 30–39, 40–49, and 50–59 years old. She studies the participants in the same manner at one point in time. Dr. Bonet is conducting research using the ________ method.
Noted psychologist Lewis Terman wanted to know if children who scored very high on an intelligence test were more likely to be successful in life. He designed a study where he followed the same group of children, assessing them at regular time intervals, for many years. What research method was Terman using?
Dr. Sharp is conducting a study that examines how children from impoverished backgrounds develop language skills. With parents’ consent, he studies one group of 3-year-olds, another group of 4-year-olds, and a third group of 5-year-olds for a total of three years. The children are assessed every 6 months for that 3-year period. What kind of research method is Dr. Sharp using?
Among the research methods used to study human growth and development, which is particularly good at showing changes both within individuals and between groups?