A researcher is interested in how personality types are influenced by distractions. Individuals were selected to represent two different personality types: introverts and extroverts. Half of the participants in each group were tested in a noisy room, filled with distraction, whereas the other half were tested in a quiet, calm room. The researcher was measuring the number of errors committed by each individual. He found that introverted personalities in a quiet room scored an average of 7, introverted personalitiesin a noisy room scored an average of 15, extroverted personalities in a quiet room scored an average of 13, and extroverted personality in a noisy room scored an average of 8.

a. What are the Independent variables? Include the levels of each. (3 points)

b. What is the dependent variable? (1 point)

c. Decide whether there are main effect(s). Interpret. (6 points)

d. Decide whether there is/are interaction(s). Interpret. (5 points)