A personality psychologist was interested in examining whether the prevalence of
narcissism differed between people based on the type of pet they own: cats, dogs, or exotic
pets. She administered a questionnaire that probed narcissistic personality traits to
randomly selected participants. She collapsed the questionnaire items into a continuousvalued composite index of narcissism prevalence. She included biological sex as a factor in
her analysis to examine whether biological sex interacts with pet type to influence the
prevalence of narcissism. This gave her a 2×3 experimental design with sex (men, women)
and pet type (cat, dog, exotic) as factors
Sample Solution
