Computer-mediated communication study. Computermediated communication (CMC) is a form of interaction that heavily involves technology (e.g., instant messaging, e-mail). A study was conducted to compare relational intimacy in people interacting via CMC with people meeting face-to-face (FTF) ( Journal of Computer-Mediated Communication , Apr. 2004). Participants were 48 undergraduate students, of whom half were randomly assigned to the CMC group and half to the FTF group. Each group was given a task that required communication among its group members. Those in the CMC group communicatedvia the “chat” mode of instant-messaging software; those in the FTF group met in a conference room. The variable of interest, relational intimacy score, was measured (on a seven-point scale) for each participant after each of three different meetings. Scores for the first meeting are given in the accompanying table and saved in the INTIMACY file. The researchers hypothesized that the relational intimacy scores for participants in the CMC group will tend to be lower than the relational intimacy scores for participants in the FTF group.
CMC group: |
4 3 3 4 3 3 3 3 4 4 3 4 3 3 2 4 2 4 5 4 4 4 5 3 |
FTF group: |
5 4 4 4 3 3 3 4 3 3 3 3 4 4 4 4 4 3 3 3 4 4 2 4 |
a. Which nonparametric procedure should be used to test the researchers’ hypothesis?
b. Specify the null and alternative hypotheses of the test.
c. Give the rejection region for the test, using α = .10 .
d. Conduct the test and give the appropriate conclusion in the context of the problem.
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