PSYC 202 – Psychological Research II Homework Assignment #___
DUE: 2 x 2 Research Design
The experimenters were interested in the characteristics of a person that influence judgments of guilt
when that person is accused of a crime. They hypothesized that an alleged criminals’ attractiveness and facial
expression may influence the judge’s opinion concerning their level of guilt. Participants read a description of
an alleged crime accompanied by a photograph of the person who was supposed to have committed the crime.
The photographs that were used had been rated by independent judges as to the attractiveness of the person in
each photo, and only those photos ranked as attractive and those photos ranked as unattractive were used. In
addition, the photo depicted a person smiling or not smiling. After the participant read the description of the
alleged crime, each then judged how likely it was that the person in the photo committed the crime. A Likert-
type scale was used for the judgment responses (1 = innocent, 2 = not likely to be guilty, 3 = maybe
guilty/maybe not, 4 = very likely to be guilty, and 5 = guilty).
What is the design of the study (for each independent variable)?
A different possible result is graphed in each of Figures 1, 2, and 3 below. Transfer the means that are graphed
into the appropriate cells of the table for each. Calculate and fill in the marginal means. Make sure you label it
correctly (with the independent variable and the levels of each). Then write a verbal conclusion that describes
the results in that Figure appropriately. (For eyeball analyses, assume a difference of 1.5 is significant.)
Verbal Conclusion:
Figure 1
0
1
2
3
4
5
A1 A2
Guilt Judg ement
B1
B2
A1 A2
B1
B2
