# What is the value of the estimated standard error for the following set of D scores?

or which of the following situations would a repeated-measures research design be appropriate?

a. comparing mathematical skills for girls versus boys at age 10

b. comparing pain tolerance with and without acupuncture needles

c. comparing self-esteem for students who participate in school athletics versus those who do not

d. comparing verbal skills for science majors versus art major at a college

2. A repeated-measures experiment and a matched-subjects experiment each produce a t statistic with df = 10. How many individuals participated in the study?

a. 11 for repeated, and 11 for matched

b. 11 for repeated, and 12 for matched

c. 11 for repeated and 22 for matched

d. 12 for repeated, and 12 for matched

3. For the repeated-measures t statistic, df – ________.

a. n1 + n2 -2

b. (n1 – 1) + (n2 – 1)

c. n-1

d. n1 + n2 -1

4. The null hypothesis for a repeated-measures test states:

a. Each individual will have a difference score of D = 02

b. The overall sample will have a mean difference of MD = 0

c. The entire population will have a mean difference of µD = 0

d. All of the other options are correct

5. What is the value of the estimated standard error for the following set of D scores? Scores: 7, 1, 7

a. 12

b. 8/3

c. 4

d. 2

6. A researcher reports t(12) = 2.86, p<.05 for a repeated-measures research study. How many individuals participated in the study?

a. n = 11

b. n = 13

c. n = 24

d. n = 25

7. If the sample mean difference is held constant, which of the following sets of date are most likely to produce a significant t statistic?

a. n = 15, and SS = 10

b. n = 15 , and SS = 100

c. n =30, and SS = 10

d. n = 30 and SS = 100

8. Which of the following samples will produce the largest value for a t statistic?

a. MD = 5 with SS = 20

b. MD = 10 with SS = 20

c. MD = 5 with SS = 40

d. MD = 10 with SS = 40

9. Compared to an independent-measures design, a repeated-measured study is more likely to find a significant effect because it reduces the contribution of variance due to _____

a. MD

b. degrees of freedom

c. the effect of the treatment

d. individual differences

10. In a repeated-measures experiment, each individual participates in one treatment condition and then moves on to a second treatment condition. One of the major concerns in this type of study is that participation in the first treatment may influence the participant’s score in the second treatment. This problem is called __________.

a. individual differences

b. order effects

c. homogeneity of variance

d. bi-treatment effect

Problems

1. Briefly explain the advantages and disadvantages of using a repeated-measures design opposed to an independent-measures design.

<pclass=”msonormal”>2. Calculate the difference scores and find MD for the following data from a repeated-measures study,

Subject Treatment 1 Treatment 2

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