Researchers identified situations that would evoke either no, mild levels, or moderate levels of stress. They brought 60 people individually into a lab and presented three conditions sequentially, counting how many of the snacks were eaten during each episode. The order of presentation was varied across participants. One-third of the people did no-mild-moderate stress; another third did mild-moderate-no stress, and the final third did moderate-no-mild stress. This is a _____________ study a. matched pair b. 2x2 design with one within and one between variable c. within s's d. between s's

The 2x2 factorial design is a way of research used in order to efficiently analyze two different process in just one sample. In a mixed factorial design there are normally two or more independent variables, at least it is possible to find in this kind of research method one within subjects factor that is normally repeated, and one between group variable.