第121章 (第2/3页)
ed: word associations, reaction
times, and expressive behavior.
Procedure
Two male students will engage in a role-playing task designed to make one of them feel guilty about having
murdered a woman who was blackmailing him. The guilty student destroys the evidence, including her
photo, by burning it, and then tries to conceal his guilt from everyone. (Students often feel guilty about the
act of burning the letter and photo; some keep the photo, especially if you previously have had it
autographed with the name of the person you selected—then they really feel guilty.) The innocent student
receives instructions to get a drink of water to relieve the thirst he is supposed to be experiencing.
The class is cast in the role of “psychodetectives” trying to uncover the truth. They might be psychologists
hired by the court, experimenters, or jury members. The final decision centers on determining which of the
two students is guilty and on what evidence that inference rests. It is interesting to look at “false
negatives”—believing the guilty subject to be innocent, and “false positives”—believing the innocent one to
be guilty.
Materials
You need to provide a stopwatch, two envelopes, three matches, and a metal pan. You are given two letters,
a woman’s photo, a word list, data sheet, Expressive Behavior Encoding Guide and Tally Table, work
association norms, reaction time table, and verdict slips.
Having several stopwatches and calculators would be helpful.
Subjects
Three (or four) for pretesting, two to participate; rest of class to be given research tasks.
Time required for Research
25-30 minutes for data collection; 10-20 minutes for analysis and verdict.
Time Required for Discussion
10 minutes before demonstration; 10-30 minutes after. (This section could be extended over two class periods.)
Method
1. Before class, prepare two envelopes. One should contain the instructions designed to introduce
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guilt; the other contains innocuous instructions (see letters at the end of this section). The envelopes
should be identical. In the guilty letter, you must indicate a safe place where the subject must go in
order to perform the guilty act; you must also make the necessary prepa
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