A Researcher Is Worried That Performance on an Aptitude Test

Multiple Choice

A researcher is worried that performance on an aptitude test will improve simply because of repeat exposure to the instrument, which will cloud his ability to assess the impact of two unique educational interventions he wants to study.To help remove the effect of repeated exposure, the researcher could use:

A) repeated measures.
B) counterbalancing.
C) a within-groups design.
D) a single-sample t test.