Logan accessed an existing database to answer his research question regarding the role of identification of a learning disability and odds of going to a private school. The variables of interest include category of disability, type of school, achievement scores in the first, third, and sixth grade, parents SES.
-Logan needs to report the correlations among first, third, and sixth grade achievement scores. Which is the most likely measure of relationship appropriate for him to use?
A) Spearman Rho
B) Pearson r
C) Cronbach's alpha
D) Kendall's Tau

Question

Quizplus · Accepted Answer

Pearson r is the most appropriate measure of correlation for variables that have a linear relationship, such as achievement scores across different grades. The other options, Spearman Rho, Cronbach's alpha, and Kendall's Tau, are not appropriate for measuring linear correlations among continuous variables.

Logan Accessed an Existing Database to Answer His Research Question