ABSTRACT
The important use of correlation is to describe the validity of tests and measurement scales. The method for estimating validity is to administer the test to a group of examinees and to obtain another set of scores on a variable that should be related to the test scores. To the extent that the two variables are related in the expected direction, the test is said to be valid. When correlation coefficients are used to describe validity, they are usually called validity coefficients. As a measure of mathematics anxiety, the Mathematics Anxiety Rating Scale (MARS) has been a major scale used for research and clinical studies since 1972. Despite the usefulness of the original scale, researchers have sought a shorter version of the scale to reduce the administration time of the original 98-item inventory. This chapter explains the shorter version of the Mathematics Anxiety Rating Scale. It provides information on validity and test-retest reliability for the brief version.
