A. identify the DV b. identify ALL of the IVs, indicate the levels of EACH, and indicate whether they are BS or WS
c. place the data into the correct cells of a box matrix and calculate the row and column means
d. draw a graph of the results
e. determine if main effects and/or interactions exist and provide a verbal description of EACH For the purposes of the exercise, assume that a difference of “2” between any of the row, column, or cell means is a significant difference.

1. A researcher is interested in the effects of ambiguity and number of bystanders on helping behavior. Each participant fills out a questionnaire in a room by themselves or with two other people (confederates) who appear to be other participants. The experimenter distributes the questionnaire and then goes into the room next door. After 5 minutes, there is a loud crash. For half of the participants, the experimenter unambiguously calls out that he has fallen, is hurt, and needs help. For the remaining participants, the situation is more ambiguous –the experimenter says nothing. Twenty participants are tested in each condition, and the experimenter records how long it takes (in seconds) before the participant offers help. (Confederates do not respond to the noise.)

0 bystanders, ambiguous: 24s
2 bystanders, ambiguous: 38s
0 bystanders, unambiguous: 14s
2 bystanders, unambiguous: 14s