Physically, the safest age for a woman to have a baby is somewhere between 30 and 40 years

An experiment is a research method in which the researcher

A) assumes that changes in the dependent variable create changes in the independent variable B) systematically varies one factor to see if it has any effect on another factor C) systematically varies two or more factors at the same time and records the results D) is able to make predictions in everyday life with the same precision as in the laboratory

Dr. Faulkner believes that directly observable events—stimuli and responses—are the appropriate focus of the study of development. Dr. Faulkner probably follows the __________ perspective of development

A) psychosexual B) psychosocial C) behaviorism D) cognitive-developmental