In Studying the Correlation Between the Amount of Time Children

Multiple Choice

In studying the correlation between the amount of time children watch violence on television and children's levels of aggressiveness,researchers found that a lack of adult supervision could be a third variable.To control for the third variable,researchers observed children who experienced different amounts of supervision.They made sure that for every child observed who watched a lot of violence on television and was supervised X% of the time,they also observed another child who did not watch a lot of violence on television and was supervised X% of the time.This method is called:

A) third-variable correlation.
B) matched samples.
C) matched pairs.
D) manipulation.