Final answer:
The college admissions advisor is concerned with the predictive validity of their study when assessing the usefulness of test scores and GPA for student selection.
Step-by-step explanation:
When a college admissions advisor is concerned about whether their data, such as test scores and GPA, is useful for selecting students, they are concerned with the predictive validity of their study. Predictive validity refers to the ability of a test to accurately forecast the success of students, like predicting college GPA from SAT or ACT scores. Yet, the reliability and validity of standardized tests like the SAT and ACT are subjects of debate, with some research indicating potential biases and overestimation of their predictive power.