Name ______
Dr. Paul Utted was interested in the effects of alcohol consumption on perceptions of attractiveness. His rationale for the study was to test the hypothesis that after alcohol is consumed, subjective perceptions of attractiveness would become more inaccurate (the well-known “Beer goggles” effect). Dr. Utted was also interested in whether this effect was different for men than for women. He selected 48 students (24 males and 24 females over the age of 21) from the Psychology Participant Poolwho agreed to participate in study that involved the consumption of alcohol. Males and females were randomly assigned to one of three groups. Group one was given no-alcohol (they received unlimited quantities of a placebo alcohol-free beer or cider), the second group was given two pints (32 fluid ounces) of beer or cider and the third groups was given 4 pints (64 fluid ounces) of beer or cider. Each alcoholic beverage contained 5 percentalcohol. Each group watched videos while consuming the alcohol. At the end of a 1 hour period each participant was shown still pictures of the four of the actors featured in the videos and rated them for attractiveness on a 100 point scale where higher numbers indicated more attractiveness. The attractiveness score for the four actors was average to produce one score per participant.
- What is the dependent variable? ______(1)
- What are the factors? ______(2)
- What is the design of the study? ______(2)
- Fully interpret the Main effects and Interaction for this study. Include a sentence to summarize the results (12)
Descriptive Statistics
Dependent Variable: Attractiveness
Condition / Sex / Mean / Std. Deviation / N
Placebo / Male / 60.6250 / 4.95516 / 8
Ffemale / 66.8750 / 10.32940 / 8
Total / 63.7500 / 8.46562 / 16
2 Pints / Male / 62.5000 / 6.54654 / 8
Female / 66.8750 / 12.51784 / 8
Total / 64.6875 / 9.91106 / 16
4 Pints / Male / 57.5000 / 7.07107 / 8
Female / 35.6250 / 10.83562 / 8
Total / 46.5625 / 14.34326 / 16
Total / Male / 60.2083 / 6.33815 / 24
Female / 56.4583 / 18.50259 / 24
Total / 58.3333 / 13.81232 / 48
Tests of Between-Subjects Effects
Source / Type III Sum of Squares / df / Mean Square / F / Sig.
Condition / 3332.292 / 2 / 1666.146 / 20.065 / .000
Sex / 168.750 / 1 / 168.750 / 2.032 / .161
Condition * Sex / 1978.125 / 2 / 989.063 / 11.911 / .000
Error / 3487.500 / 42 / 83.036
Multiple Comparisons
LSD
(I) Condition / (J) Condition / Mean Difference (I-J) / Std. Error / Sig.Placebo / 2 Pints / -.9375 / 3.22172 / .772
4 Pints / 17.1875* / 3.22172 / .000
2 Pints / Placebo / .9375 / 3.22172 / .772
4 Pints / 18.1250* / 3.22172 / .000
4 Pints / Placebo / -17.1875* / 3.22172 / .000
2 Pints / -18.1250* / 3.22172 / .000
One Way ANOVA MALES ONLY
Source / Type III Sum of Squares / df / Mean Square / F / Sig.
Condition / 102.083 / 2 / 51.042 / 1.304 / .292
Error / 821.875 / 21 / 39.137
a. Sex = Male
One Way ANOVA FEMALES ONLY
Source / Type III Sum of Squares / df / Mean Square / F / Sig.
Condition / 5208.333 / 2 / 2604.167 / 20.516 / .000
Error / 2665.625 / 21 / 126.935
a. Sex = Female
LSD MALE ONLY
(I) Condition / (J) Condition / Mean Difference (I-J) / Std. Error / Sig.Placebo / 2 Pints / -1.8750 / 3.12797 / .555
4 Pints / 3.1250 / 3.12797 / .329
2 Pints / Placebo / 1.8750 / 3.12797 / .555
4 Pints / 5.0000 / 3.12797 / .125
4 Pints / Placebo / -3.1250 / 3.12797 / .329
2 Pints / -5.0000 / 3.12797 / .125
LSD FEMALE ONLY
(I) Condition / (J) Condition / Mean Difference (I-J) / Std. Error / Sig.Placebo / 2 Pints / .0430 / 5.63326 / .980
4 Pints / 31.2500* / 5.63326 / .000
2 Pints / Placebo / .0430 / 5.63326 / .980
4 Pints / 31.2500* / 5.63326 / .000
4 Pints / Placebo / -31.2500* / 5.63326 / .000
2 Pints / -31.2500* / 5.63326 / .000