Author Question: Which one of the following conclusions can be firmly drawn only from an experimental study? a. ... (Read 141 times)

Shelles · **on:** Jun 20, 2018

Which one of the following conclusions can be firmly drawn only from an experimental study?

a. Children grow taller as they get older.
b. Boys are more likely than girls to engage in physical aggression.
c. Some drugs administered during pregnancy affect a child's prenatal development.
d. Children's muscular coordination and physical endurance improve as they grow older.

Question 2

Dr. Fitz wants to know which of three health programs is most effective in promoting children's physical well-being. With the consent of both the children and their parents, children who regularly attend a community center are randomly assigned to one of three 8-week programs. After the programs have ended, Dr. Fitz assesses the children's general physical wellbeing. Dr. Fitz's study can best be classified as which one of the following?

a. experimental
b. correlational
c. cross-sectional
d. quasi-experimental