Valentino Is a Health Psychologist Who Is Working on a Campaign

Multiple Choice

Valentino is a health psychologist who is working on a campaign to encourage people to take the stairs instead of the elevator. He places posters in the elevators in his building. In one location the posters highlight the negative consequences of taking the elevator. In another location, the posters highlight the positive consequences of taking the stairs. He then measures how many people change their behavior at each location. What measure could Valentino include as a manipulation check?

A) a self-report of participants' typical level of physical activity
B) a questionnaire asking about the content of the poster in their location
C) informant measures of participants' activity level outside of work
D) measures of daily caloric intake