Sandi believes that people who eat at McDonald's are overweight, so she decides to do a naturalistic observation of people who eat at McDonald's. What should most concern us about Sandi's observations?

Which of the following best exemplifies the borderline characteristic of splitting?

a) Tanya, who has remained depressed for several years b) Louisa, who cannot stay in serious relationships for long without feeling resentful c) Ahn, whose personality swings between being very extraverted and being very introverted d) Perry, whose view of the people in his life constantly shifts from idealized to hateful

In a within-subjects research design, different groups of participants are randomly assigned to experimental conditions or to control conditions

a. true b. false