Homework Chapter 8
Assignment:
Objective: Apply concepts Factors and Levels
- A psychology honours students is conducting a study to determine whether various categories of social support can impact cognitive performance. They measure response times on the Stroop task in people who report a low, medium, or high degree of social support from friends. In this research design, the factor is ______________.
- A psychology honours students is conducting a study to determine whether various categories of social support can impact cognitive performance. They measure response times on the Stroop task in people who report a low, medium, or high degree of social support from friends. In this research design, the levels are ______________.
Objective: Apply techniques Conducting a Dependent Means t-test
- A psychology honours students is conducting a study to determine whether various categories of social support can impact cognitive performance. They measure response times on the Stroop task in people who report a low, medium, or high degree of social support from friends. The scores for the research samples are presented in the table below, in seconds. Conduct a hypothesis test of the researcher’s prediction with significance level .05. The populations should be defined as ______________.
| Low | Med | High |
| 9.15 | 6.35 | 7.30 |
| 9.00 | 8.00 | 7.34 |
| 8.56 | 8.24 | 9.20 |
| 10.10 | 6.80 | 6.55 |
| 9.02 | 6.39 | 7.49 |
| 8.18 | 7.40 | 7.24 |
| 7.30 | 7.29 | 10.66 |
| 7.88 |
- For the research scenario described in problem 3, the hypotheses should be defined as ______________.
- For the research scenario described in problem 3, the characteristics of the comparison distribution should be defined as ______________.
- For the research scenario described in problem 3, the cutoff F score should be ______________.
- For the research scenario described in problem 3, the calculated F-test result should be ______________.
- For the research scenario described in problem 3, the hypothesis test decision should be ______________.
- For the research scenario described in problem 3, the p-value associated with the F-test result is _____________.
- For the research scenario described in problem 3, the conclusion as written in a published results section could be ______________.
Objective: Apply concepts Experimentwise alpha level
- A psychology honours students is conducting a study to determine whether various categories of social support can impact cognitive performance. They measure response times on the Stroop task in people who report a low, medium, or high degree of social support from friends. If t-tests were used to conduct tests of statistically significant difference between means, at significance level .05, the experimentwise alpha level would effectively become ______________.
Objective: Apply concepts Planned Contrasts and Posthoc tests
- Given the results of the one-way ANOVA analysis conducted for the research scenario described in problem 3, the researchers would conduct the following analyses to explore which groups differed significantly from each other: ______________.
Objective: Review techniques Bonferroni and Scheffé Corrections
- The Bonferroni correction is typically used for planned contrasts and protects against inflation of Type I error risk by ______________.
- The Scheffé correction is typically used for post-hoc tests and protects against inflation of Type I error risk by ______________.
