Which of the following procedures would yield the most appropriate data for studying the relationship between intelligence and achievement?
A) Administering an achievement test and an intelligence test to one sample of subjects
B) Administering an achievement test to one sample of subjects and an intelligence test to another sample of subjects
C) Administering an achievement test to one sample of subjects, all of whom have an I.Q. of 100
D) Administering an achievement test to two samples of subjects and an intelligence test to two different samples of subjects

Question

Quizplus · Accepted Answer

To study the relationship between intelligence and achievement effectively, both an intelligence test and an achievement test should be administered to the same group of subjects. This allows for direct comparison and correlation analysis between the two sets of scores within the same sample, providing the most relevant and accurate data to examine the relationship between these two variables.

Which of the Following Procedures Would Yield the Most Appropriate