Question 1

In a repeated-measures design, the error term is equivalent to the interaction between subjects and the repeated-measures factor.

Accepted Answer

A) True 
 B)False

Question 2

In a learning study using repeated measures, the correlation between early and later times will likely be low. Analyzing fewer levels of the independent variable would help to avoid violating the assumption of

Accepted Answer

A)  normality. 
B)  homogeneity of variance. 
C)  constant correlations among pairs of levels of the repeated variables. 
D)  MSerror is an unbiased estimate of the magnitude of effect of the predictor variable in a regression analysis.

Question 3

The typical way to control sequence effects is called

Accepted Answer

A)  block randomization. 
B)  cross-sectional experimentation. 
C)  asymmetrical transfer. 
D)  counterbalancing.

Question 4

Explain why SS_subjects is removed from SS_error in repeated-measures designs.

Accepted Answer

The answer of Explain why SS_subjects is removed from SS_error...

Question 5

If, in the example of a headache study used in the text, all subjects had been studied over the same period of time, differences that might be caused by stressful times (such as Christmas) would

Accepted Answer

A)  contaminate the results. 
B)  add to the usefulness of the results. 
C)  improve the generalizability of the study. 
D)  reduce the variability in the scores.

Question 6

The assumptions behind the analysis of repeated-measures designs include

Accepted Answer

A)  the assumption that all levels of the repeated measure are equally correlated with each other. 
B)  the assumption of normality. 
C)  the assumption of homogeneity of variance. 
D)  all of the above

Question 7

If we have a repeated-measures design with subjects receiving four levels of a treatment, we assume that

Accepted Answer

A)  the correlations among the levels will be zero. 
B)  the correlations among the levels will be 1.0 
C)  the correlations among the levels will be random. 
D)  the correlations among the levels will all be about the same.

Question 8

Calculate and interpret F based on the following data.

Accepted Answer

The answer of Calculate and interpret F based on the...

Question 9

Which of the following demonstrates the similarities of a repeated-measures analysis of variance for two trials and a t test for related means?

Accepted Answer

A)  F = t 2 
B)  F 2 = t 
C)  F = t 
D)  F = 2 t

Question 10

Given the following data from a repeated-measures design, what is the value for SS_error? SS_subjects = 950, SS_time = 1500, SS_total = 3100

Accepted Answer

The answer of Given the following data from a repeated-measures...

Question 11

Measuring the height of the same group of children every year for three years is an example of a between-subjects design.

Accepted Answer

A) True 
 B)False

Question 12

A _______ design is one in which subjects are measured repeatedly over time.

Accepted Answer

A)  between-subjects 
B)  factorial 
C)  repeated-measures 
D)  matched groups

Question 13

Answer the following questions based on the summary table below. 
  
a. How many people were in the sample? 
b. How many times was the dependent variable measured? 
c. Was there a difference in the dependent variable over time?   Explain.

Accepted Answer

The answer of Answer the following questions based on the...

Question 14

The major advantage of repeated-measures designs is that

Accepted Answer

A)  they allow you to use more subjects. 
B)  they allow you to remove subject differences from the error term. 
C)  they are easier to analyze. 
D)  they have a higher level of β.

Question 15

A researcher collected data from behaviorally disturbed youth to see if introducing a token economy would reduce their disruptive behavior. He collected 3 weeks of data at baseline, treatment, and withdrawal respectively. Identify three meaningful multiple comparisons you could calculate based on this data. Explain your answers.

Accepted Answer

The answer of A researcher collected data from behaviorally disturbed...

Question 16

Calculate and interpret F for the following example.

Accepted Answer

The answer of Calculate and interpret F for the following...

Question 17

You want to run a study examining the effects of poverty on the development of antisocial behavior. You randomly select a large group of normal 12- year-old children and sort them into three groups on the basis of family income. You meet with them yearly until they are 25 years old, using a standard assessment of antisocial behavior. What test should you run to analyze this data?

Accepted Answer

A)  independent samples ANOVA 
B)  one-way ANOVA 
C)  repeated-measures ANOVA 
D)  chi-square

Question 18

Counterbalancing is a technique to

Accepted Answer

A)  lower the weight of subjects. 
B)  distribute carry-over effects evenly across the data. 
C)  increase the power of an experiment. 
D)  reduce the likelihood of reasonable conclusions.

Question 19

If you are concerned that you have violated the assumptions behind a repeated-measures design, you can

Accepted Answer

A)  limit your analysis to only those levels of the repeated measure that meet the assumption. 
B)  use an adjustment to your degrees of freedom. 
C)  pretend you didn't notice that there was a problem. 
D)  both a and b

Question 20

If a repeated-measures analysis of variance usually has an error term that is smaller that the error term in the corresponding between-subjects design, then we can assume that

Accepted Answer

A)  repeated-measures designs have less power. 
B)  repeated-measures designs have greater power. 
C)  there are no differences due to power between the two kinds of designs. 
D)  neither design has very much power.

Exam 18: Repeated-Measures Analysis of Variance