Whether or not you found a significant difference in Exercise 13.13, Vul and Pashler did. But are first guesses better than the average of the two?
Answer to relevant QuestionsIf there was reason to believe that carry-over effects could influence the data on guessing behavior, how might we control such effects? Some would object that the data in Exercise 13.1 are clearly discrete, if not ordinal, as defined in Chapter 2, and that it is inappropriate to run a t test on them. Can you think what might be a counter argument? (This is ...Much has been made of the concept of experimenter bias, which refers to the fact that for even the most conscientious experimenters there seems to be a tendency for the data to come out in the desired direction. Suppose we ...The t value that you obtain in Exercise 14.1 will be somewhat smaller than the t value from Exercise 13.1. Why should we have anticipated this? Using the Java program by Lenth (2011) referred to earlier, calculate power for the Adams et al. (1996) data in Table 14.2 on homophobia.
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