Name _____________________________________
Date Due __________________________________
Assignment (circle, as instructed):
problems 1 2 3 4 5 6 ALL
Factorial Designs Exercise I (36 points)
Instruction: Identify the following designs and manipulated variables. If the design is a mixed design,
identify the correlational variable(s). If the design is a repeated measures, indicate which
factor is repeated.
Design 1 (6 points)
College sophomores were given a short course in speed reading. Three groups had courses lasting for 5,
15, or 25 sessions. At the conclusion of the course, participants were asked to read a paragraph, followed
by a test of comprehension. Before taking the test, participants in each group were offered a money
incentive - no money, $1, or $10 for a certain level of performance. The investigator collected the reading
time and number of correct items on the comprehension test for each participant.
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No
Factorial Designs Exercise I (continued)
Design 2 (6 points)
Males participated in an experiment to investigate factors that influence their degree of sexual attraction
toward women. Participants drank "cocktails" containing no alcohol, one ounce, two ounces, or three
ounces of alcohol. After "drinking up," each participant was exposed to an arousing stimulus: a Playboy
centerfold, a written erotic story, or romantic music (Robert Goulet sings "Tchaikovsky). After exposure,
participants rated their arousal level and the attractiveness of a college coed in addition to physiological
measures of arousal (heart rate and GSR).
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No
Factorial Designs I (continued)
Design 3 (6 points)
A researcher interested in weight control wondered whether normal and overweight individuals differ in
their reaction to the availability of food. Thus, normal and overweight participants were told to eat as
many peanuts as they desired while working on a questionnaire. One manipulation was the proximity of
the peanut dish (on the participant’s desk or the experimenter’s desk); the second manipulation was
whether the peanuts were unshelled or shelled. After filling out the questionnaire the peanut dish was
weighed to determine the number of peanuts consumed.
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No
Factorial Designs I (continued)
Design 4 (6 points)
A researcher studied the influence of intensity of room illumination (low, medium and high) on reading
speed in 5th graders. Also, children were classified as "good" or "bad" readers from achievement test
scores. Each group of children read 750 word passages under all three levels of illumination (three
reading trials). The order of the trials for each child was randomly determined.
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No
Factorial Designs I (continued)
Design 5 (6 points)
A researcher investigated the effect of a child' s hair length on judgments of his/her personality and
intelligence. Teachers were given photographs of children to obtain their "first impression" of students.
Each teacher was given a picture of a boy or girl whose hair was either very short, about shoulder length,
or very long. Teachers rated the friendliness of the children and were then asked to evaluate the child’s
intelligence as above average, average or below average.
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No
Factorial Designs I (continued)
Design 6 (6 points)
An investigator was interested in the effects of various treatments on the reduction of fear in phobic
participants. He suspected that the type of phobia may interact with therapeutic treatments, specifically
that the types of treatment effective for agoraphobics (fear of open spaces) and claustrophobics (fear of
closed spaces) may be different. He therefore divided his subjects into two groups on the basis of type of
fear, and then assigned members of each group to treatment groups: desensitization, insight,
attention-placebo, or no-treatment control. After 3 months, participants' anxiety in the feared situation
was measured.
1. Name the design (e.g., 2 X 2 factorial):
2. Total number of conditions: ________
3. Name(s) of the manipulated variable(s):
4. Is this an IV x SV design?
______ Yes
______ No
Name(s) of the subject variable(s):
5. Is this a repeated measures design?
Name(s) of the repeated variable(s):
6. Name of the dependent variables:
_____ Yes
_____ No