A researcher conducted a study to determine if level of self-disclosure affects the trustworthiness of an individual. Participants were randomly assigned to engage in a 5-minute conversation with a stranger who disclosed a low, medium, or high level of personal information. After the conversation the participants rated the trustworthiness of the person. The higher the score on the 25-point scale, the more trustworthy the participant rated the target.

a. What type of design is this study? How do you know? Identify all the characteristics that help you to identify the type of design.
b. Based on your results, would you reject or retain the null hypothesis? What is the probability of making a Type I error? A Type II error?
c. Interpret the meaning of the effect size for the study.
d. What does the post hoc test tell you about self-disclosure and trustworthiness?
e. Comment on the practical significance of the data.

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Report Trust Self Disclosure Mean N Std. Deviation Low Medium High Total 15.0000 20.3000 13.7000 16.3333 10 10 10 30 2.62467 2.11082 3.74314 4.03718 ANOVA Table Sum of Squares 244.467 228.200 472.667 Mean Square 2 27 29 Sig Between Groups Within Groups Total (Combined) 122.233 14.462 Trust Self Disclosure 8.452 Measures of Association Eta Eta Squared 719 517 Trust Self Disclosure Multiple Comparisons Dependent Variable: Trust LSD (I) Self Disclosure (J) Self Disclosure Mean Differece Std. Error Sig (I-J) 1.30014 1.30000 1.30014 1.30014 1.30014 -1.30000 1.30014 1.30014 Medium 5.30000 .000 .326 .000 Low Medium High The mean difference is significant at the 0.05 level. High Low 5.30000 6.60000 High Low 326