2. To answer this question, your could start by thinking of a common sense idea. If you are stuck, you could just google "English proverbs" or try this site. Then, use GoogleScholar, PsycINFO, PsycArticle, or some other data base to find that proverb in an article's title. If you get stuck, you could simply look for the "girls get prettier at closing time" studies referenced in your text.
3. See box 3.2, p. 85. If you need more help, these links may help
4. According to dissonance theory, what is an important variable that mediates attitude change? The feeling of tension called dissonance.
5. Your strategy should be similar to how you would attack question 2 (see above). Remember that if you get stuck, you could at least do a search for an article that had "cognitive dissonance theory" in the title.
6. Describe the relationship between moderator variables and external validity. To the extent that there are moderator variables (variables that moderate the relationship between two variables), it limits that relationship’s external validity. For example, a relationship that exists when the moderator variable is not present may be non-existent or reversed when the moderator variable is present.
7. There is not a set answer. If you are stuck, the authors, in the first paragraph on page 659, give you some hints.
8. Design a study to test the generalizability of the findings of the study reported in Appendix B. If you are stuck, see the second paragraph on page 659.