A researcher studies the relationship between early reading and later school achievement. She decides that a potentially important extraneous variable is IQ. In developing her groups for her study, she pairs each child who was an early reader with a child of the same IQ level who was not an early reader. The control technique she used was:
A) Holding the extraneous variable constant
B) Statistical control
C) Matching
D) Random assignment

Question

Quizplus · Accepted Answer

The researcher used matching by pairing each early reader with a non-early reader of the same IQ level to control for the extraneous variable of IQ.

A Researcher Studies the Relationship Between Early Reading and Later