In a repeated measures ANOVA, the within-participant variability is divided into two components, what are they?
Variability between conditions and total variability
Variability between conditions and random variability
Total variability and random variability
Variability between participants and random variability
Which of the following is an important advantage of a repeated-measures ANOVA?
A different sample of participants serves in each condition, making it possible to compare different populations
Individual differences do not contribute to unsystematic variance
A large number of participants is generally required, which provides a greater glimpse of the population
All of the above
A researcher reports ANOVA as F (2, 40) = 5.18, p = .01, how many conditions were involved in this study?
2
3
4
41
How many participants were there in the experiment reported in question 3?
21
63
44
Sphericity is an assumption in a repeated measures ANOVA. How is sphericity calculated?
By looking at the variability within each condition
By looking at the size of the differences in each condition
By looking at the difference between the first and last condition
By looking at the variability in difference scores between conditions
The following table shows the results of a repeated-measures ANOVA, but the F-value is missing. what is the F-Value?
11.10
12.13
0.91
0.08
Which of the following statements about the assumption of sphericity is NOT true?
It is tested using Levene's Test in SPSS
It is tested using Mauchley's Test in SPSS
It is automatically met when an IV has only two levels
It is the repeated measures equivalent of homogeneity of variance
If the assumption of sphericity is violated, which correction is available in SPSS?
Mauchly
Levene
Greenhouse-geisser
Kolmogorov-smirnov
The larger the F statistic is in a repeated measures ANOVA, the larger the ___________, compared to the ____________
Variation within individuals; variation between individuals
Random variation; variation between conditions
Variation between conditions; random variation
Variation between individuals; variation within individuals
A researcher wanted to see whether desensitization therapy was an effective treatment for hylophobia (fear of forests). She recorded levels of hylophobia in 20 participants at three points; before therapy, after therapy, and at a six-month follow up. The SPSS output from her data analysis is shown below. Which of the following statements is true?
The data meets the assumption of normality
The data violates the assumption of sphericity
There was a significant reduction in hylophobia following desensitisation therapy
Desensitisation therapy did not affect hylophobia levels
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