A study evaluates the effectiveness of a child abuse prevention program by comparing the rate of child abuse among parents who chose to participate in the program to the rate of parents who declined participation. This design fails to control for:
A) selection biases
B) correlation.
C) testing effects.
D) instrumentation changes

Question

A study evaluates the effectiveness of a child abuse prevention program by comparing the rate of child abuse among parents who chose to participate in the program to the rate of parents who declined participation. This design fails to control for:​
A) ​selection biases
B) correlation.​
C) testing effects.​
D) instrumentation changes​

Quizplus · Accepted Answer

The design fails to control for selection biases, as parents who choose to participate in the program may differ from those who decline in ways that affect the likelihood of child abuse, making it hard to determine if the program itself was effective or if it was just the selection process.

A Study Evaluates the Effectiveness of a Child Abuse Prevention