The three general categories of phobias in DSM-IV-TR are specific phobias, social phobias, and

Sigmund Freud's psychodynamic theory was developed primarily on the basis of

naturalistic observation. Indicate whether the statement is true or false

A researcher wants to obtain a sample of 30 preschool children consisting of 10 two-year-old children, 10 three-year-old, and 10 four-year-old children. Assuming that the children are obtained from local daycare centers, this researcher should use ____ sampling

a. cluster b. quota c. simple random d. stratified random