Research Methods for Behavioral Sciences - With MindTap
6th Edition
ISBN: 9781337754989
Author: GRAVETTER
Publisher: CENGAGE L
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Textbook Question
Chapter 11.1, Problem 1LO
Define a factorial research design, including the terms factor and level, and identity and describe factorial designs when they appear in a research report.
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Factor analysis can be used to determine whether the items on a newly designed measure
of "sociability" are better represented by two smaller constructs of "friendliness" and
"disinhibition." True False
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Psychologists at Disney World measured factors that affect the scariness of the soundtrack for their Haunted House
ride. In particular, they were interested in the loudness of the screams (soft versus loud) and the length of the screams
(short versus long). They used a 2 × 2 factorial design to test how these factors combined. They collected data from
10 different riders in each of the four conditions. Each rider rated the scariness of the ride on a nine-point scale.
short screams
long screams
soft screams
T=38, n = 10, SS = 13.6
T=64, n = 10, SS = 22.4
loud screams
T=52, n=10, SS = 29.6
T=50, n=10, SS = 16.0
For these data: G = 204, N = 40, X2 = 1156.
1. Sketch a dataplot of the mean rating in each condition.
2. Calculate SS total, the total sum of squares
3. Calculate SSwithin, the within-treatments sum of squares.
4. Calculate SSbetween, the between-treatments sum of squares.
5. Calculate SSA the sum of squares for Factor A (length of scream).
6. Calculate SSB, the sum of squares…
Chapter 11 Solutions
Research Methods for Behavioral Sciences - With MindTap
Ch. 11.1 - Define a factorial research design, including the...Ch. 11.2 - Define a main effect for one factor and an...Ch. 11.2 - Explain how the existence of an interaction can...Ch. 11.2 - Describe and explain the independent relationship...Ch. 11.3 - Explain how a factorial study can combine...Ch. 11.3 - Identify the statistical analyses that are...Ch. 11.4 - Describe three specific applications of the...Ch. 11 - In addition to the key words, you should also be...Ch. 11 - In a classic study, Shrauger (1972) examined the...Ch. 11 - Suppose a researcher conducts a two-factor study...
Ch. 11 - The following matrix represents the results (the...Ch. 11 - The following data show the pattern of results...Ch. 11 - Explain why the main effects in a factorial study...Ch. 11 - Explain what is meant by the concept that main...Ch. 11 - In Figure 11.5, we show three combinations of main...Ch. 11 - For a two-factor research study with two levels...Ch. 11 - A researcher would like to use a factorial study...Ch. 11 - A two-factor analysis of variance is used to...Ch. 11 - A researcher has demonstrated that a new...
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