When Brandon was told that he correctly answered 80 percent of the items on a math achievement test, he asked how his performance compared with that of the average test-taker. Brandon's concern was directly related to the issue of Group of answer choices content validity. predictive validity. standardization. factor analysis. reliability.

The answer is standardization.

Step-by-step explanation:

Achievement tests are used in describing students' learning abilities and academic accomplishments.

Since standardized achievement tests can give a better indication of students' weaknesses, the test results will corroborate what can be seen on a daily basis, and the results can give insight into how a student's achievement compares to the average national student.

So, Brandon's concern was directly related to the issue of standardization because he wanted to make sure the test fulfilled the requirements of a standardized test (i. e the questions, conditions for administering, scoring procedures, and interpretations) were consistent, and if so his score would not deviate greatly from the average test taker, and he wouldn't be an exception in obtaining such a high score.