Exercises 45713.6 Plot the cell means in Exercise 13.5.
13.7 For the study in Exercise 13.5, to what would refer (if Awere used to represent Area)?
13.8 Use simple effects to clarify the results for the Area factor in Exercise 13.5. Show that these
simple effects sum to the correct figure.
13.9 Use the Bonferroni test to compare the neutral site to each of the other areas in
Exercise 13.5, ignoring the length of stimulation. (Hint: Follow the procedures outlined
in Chapters 11 and 12, but be sure that you take nas the number of scores on which the
mean is based.)
13.10Use simple effects to examine the effect of delay of stimulation in area Afor the data in
Exercise 13.5.
13.11 Refer to Exercise 11.3a in Chapter 11. You will see that it forms a 2 3 2 factorial. Run the
factorial analysis and interpret the results.
13.12 In Exercise 11.3 you ran a test between Groups 1 and 3 combined versus Groups 2 and 4
combined. How does that compare to testing the main effect of Level of processing in
Exercise 13.11? Is there any difference?
13.13 Make up a set of data for a 2 3 2 design that has two main effects but no interaction.
13.14 Make up a set of data for a 2 3 2 design that has no main effects but does have an interaction.
13.15 Describe a reasonable experiment for which the primary interest would be in the interaction
effect.
13.16 Assume that in Exercise 13.1 the last three participants in cell 12 (Primiparous, LBW .18)
and the last two participants in cell 23 (Multiparous, NBW) refused to give consent for their
data to be used. Rerun the analysis.
13.17 Klemchuk, Bond, and Howell (1990) examined role-taking ability in younger and older
children depending on whether or not they attended daycare. The dependent variable was a
scaled role-taking score. The sample sizes were distinctly unequal. The data follow
Younger Older
No Daycare 2 0.139 2 2.002 2 1.631 2 2.173 0.179 2 0.167 2 0.285 0.851 2 0.397
2 0.829 2 1.503 0.009 2 1.934 2 1.448 0.351 2 0.240 0.160 2 0.535
2 1.470 2 1.545 2 0.137 2 2.302 2 0.102 0.273 0.277 0.714
Daycare 2 1.412 2 0.681 0.638 2 0.222 0.668 0.859 0.782 0.851 2 0.158
2 0.896 2 0.464 2 1.659 2 2.096 0.493
Run the analysis of variance and draw the appropriate conclusions.13.18Use any standard computer software to analyze the data in Exercise 13.17. Compare your
results with those you obtained previously.
13.19 Calculate and for Exercise 13.1.
13.20 Calculate for the data in Exercise 13.1.
13.21 Calculate and for Exercise 13.5.
13.22 Calculate for the data in Exercise 13.5.
13.23 To study the effects of early experience on conditioning, an experimenter raised four groups
of rats in the presence of (1) no special stimuli, (2) a tone stimulus, (3) a vibratory stimulus,
and (4) both a tone and a vibratory stimulus. The rats were later classically conditioned us-
ing either a tone or a vibratory stimulus as the conditioned stimulus and one of three levels
of foot shock as the unconditioned stimulus. This is a 4 32 3 3 factorial design. The cell
means, rather than the raw data, follow. The SStotal 5 41,151.00 and 5 5. The dependent
variable was the number of trials to a predetermined criterion.
nijkdNh^2 vN^2dNh^2 vN^2a 1