Author Question: The two control groups in the California study on the effect of a new child passenger restraint law ... (Read 18 times)

Awilson837 · **on:** Aug 4, 2018

The two control groups in the California study on the effect of a new child passenger restraint law were added to control for

A) instrumentation.
B) history.
C) maturation.
D) Both A and B

Question 2

The study conducted in California to study the effects of child passenger restraint law for children under age 4 included two control groups. What were the two groups?

A) Children over age 4 and children under age 4 in another state.
B) Adults with children and children over age 4 in another state.
C) Adults in California and adults in another state.
D) Children with car seats and children without car seats.