Answer:
Holly is assessing test-retest reliability by having the same individuals complete her assessment on two separate occasions, to ensure the instrument's consistency over time.
Step-by-step explanation:
Holly is assessing test-retest reliability, which refers to the stability of a test over time. This form of reliability is concerned with the consistency of test scores on two separate occasions. As Holly is asking the same group of individuals to complete her disordered eating assessment instrument on two different occasions, she is looking to determine if the instrument yields similar results each time, thus measuring the test-retest reliability of the assessment.