Faustino Is Examining the Allergy Effects of Different Brands of Men's

Multiple Choice

Faustino is examining the allergy effects of different brands of men's cologne. He has collected 40 people for each of the cologne conditions and has approximately 300 participants among the conditions. However, Faustino's research question can only truly be tested if he uses the same participants in all conditions, otherwise he will not have standardized the various allergy conditions and it will be difficult to draw conclusions regarding the colognes' likeliness to cause an allergic reaction. Faustino may want to consider re-designing his study to use a:

A) within-subjects design.
B) between-subjects design.
C) mixed factorial design.
D) correlational design.