




| Variable | Description |
| Sports | 1 = athletes, 2 = non-athletes |
| Gender | 1 = males, 2 = females |
| Anger-Out (AO) | high scores demonstrate that people deal with anger by expressing it in a verbally or physically aggressive fashion |
| Anger-In (AI) |
high scores demonstrate that people experience anger but do not express it (suppress their anger) |
| Control-Out (CO) | high scores demonstrate that people control the outward expression of angry feelings |
| Control-In (CI) | high scores demonstrate that people control angry feelings by calming down or cooling off |
| Expression (AE) | index of general anger expression: (Anger-Out) + (Anger-In) – (Control-Out) – (Control-In) + 48 |
Note: Description of the items comes from Spielbergeret al. (1999).
References
Bushman, B.J., Baumeister, R.F. & Phillips, C.M. (2001). Do people aggress to improve their mood? Catharsis beliefs, affect regulation opportunity, and aggressive responding. Journal of Personality and Social Psychology, 81(1), 17-32.
Spielberger, C. D., Sydeman, S. J., Owen, A. E., Marsh, B. J. (1999). Measuring anxiety and anger with the State-Trait Anxiety Inventory (STAI) and the State-Trait Anger Expression Inventory (STAXI). In M. E. Maruish (Ed.), The use of psychological testing for treatment planning and outcomes assessment (2nd ed., pp. 993-1021). Mahwah: Lawrence Erlbaum Associates.
Striegel, D. (1994). Anger in tennis: Part 2. Effects of anger on performance, coping with anger, and using anger to one’s benefit. Journal of Performance Psychology, 2, 56-92.
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Exercises
1. Which variables are the participant variables? (They act as independent variables in this study.)
2. What are the dependent variables?
3. Is Anger-Out a quantitative or qualitative variable?
4. Does Anger-Out have a postive skew, a negative skew, or no skew?
5. What are the mean and standard deviation of the Anger-Out scores? Compute a confidence interval for the mean Anger-Out score.
6. Is there a difference in how much males and females use aggressive behavior to improve an angry mood? For the “Anger-Out” scores:
a. Create parallel box plots.
b. Create a back-to-back stem and leaf displays (You may have trouble finding a computer to do this so you may have to do it by hand).
c. Compute a confidence interval on the difference between means.
d. Compute a significance test on the difference between means using a t test.
5. Compute a significance test on the difference between means using ANOVA.Compare your results to (d) above.
7. What is the range of the Anger-In scores? What is the interquartile range?
8. Create parallel box plots for the Anger-In scores by sports participation.
9. Calculate the confidence interval for the difference between mean Anger-In score for the athletes and non-athletes. What can you conclude?
10. Plot a histogram of the distribution of the Control-Out scores.
11. What is the overall mean Control-Out score? What is the mean Control-Out score for the athletes? What is the mean Control-Out score for the non-athletes?
12. Determine if the difference in the mean Control-Out score for athletes and non-athletes is statistically significant.
13. Create a bar graph comparing the mean Control-In score for the athletes and the non-athletes. What would be a better way to display this data?
14. What is the variance of the Control-In scores for the athletes? What is the variance of the Control-In scores for the non-athletes?
15. What is the standard error of the mean for the Control-In scores for the athletes? What is the standard error of the mean of the Control-In scores for the non-athletes? Why is it smaller for non-athletes?
16. Do athletes or non-athletes calm down more when angry? Conduct a t test to see if the difference between groups in Control-In scores is statistically significant.
17. Plot parallel box plots of the Anger Expression Index by sports participation. Does it look like there are any outliers? Which group reported expressing more anger?
18. Plot parallel box plots of the Anger Expression Index by gender.
19. Using the Anger Expression Index as the dependent variable, perform a 2×2 ANOVA with gender and sports participation as the two factors. Do athletes and non-athletes differ significantly in how much anger they express? Do the genders differ significantly in Anger Expression Index? Is the effect of sports participation significantly different for the two genders?
20. What is the correlation between the Control-In and Control-Out scores? Is this correlation statistically significant at the 0.01 level?
21. Would you expect the correlation between the Anger-Out and Control-Out scores to be positive or negative? Compute this correlation.
22. Find the regression line for predicting Anger-Out from Control-Out.
a. What is the slope?
b. What is the intercept?
c. Is the relationship at least approximately linear?
d. Test to see if the slope is significantly different from 0.
e. What is the standard error of the estimate?