Question: Return to the study first described in Question 16.5 on page 336, where a psychologist tests whether shy college students initiate more eye contacts with strangers because of training sessions in assertive behavior. Use the same data, but now assume that eight subjects, coded as A, B, . . . G, H, are tested repeatedly after zero, one, two, and three training sessions. (Incidentally, since the psychologist is interested in any learning or sequential effect, it would not make sense—indeed, it’s impossible, given the sequential nature of the independent variable—to counterbalance the four sessions.) The results are expressed as the observed number of eye contacts:

WORKSHOP SESSIONS

SUBJECT ZERO ONE TWO THREETsubject

A 1 2 4 7 14

B 0 1 2 6 9

C 0 2 3 6 11

D 2 4 6 7 19

E 3 4 7 9 23

F 4 6 8 10 28

G 2 3 5 8 18

H 1 3 5 7 16

G=138

1. Summarize the results with an ANOA table. Short-circuit computation work by using the results in Question 16.5 for the SS terms, that is, SS between = 154.12, SS within = 132.75, and SS total = 286.87
2. Whenever appropriate, estimate effect sizes with n 2/p and with d, and conduct Tukey’s HSD test.
3. Compare these results with repeated measures with those in Question 16.5 for independent samples.

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