Final answer:
Dr. Rodriquez is testing the test-retest reliability of a measure by comparing the scores of the same participants at two different times.
Step-by-step explanation:
Dr. Rodriquez is using a measure at the beginning and end of the semester and comparing the scores between the two time points to test the test-retest reliability of the measure. Test-retest reliability refers to the ability of a measure to produce consistent results when the same test is taken by the same individuals at different points in time. This type of reliability ensures that the measure can be considered dependable over time and provides similar outcomes on repeated applications, as long as the phenomenon that it measures has not changed.