Langston, Research Methods, Sample Exam 2

You are allowed to use a cheat sheet on this exam. The cheat sheet may be one side of one sheet of paper, whatever you want to put on it.

The first (approximately) half of the exam will be trick questions related to correlation and causation. I am not showing you any of those, prepare to be tricked.

You will also see questions like this one:

1.  For each situation below, what analysis would you do?  Why would you do it?
a.  I collect information about people's income on a survey.  I want to compute the strength of the relationship between income and number of shopping trips.
b.  I also ask if people would like a shuttle to run from campus to Nashville.  I want to know if the distribution of “yes” and “no” responses is different for the two sexes.

These are the (exact) questions you will answer for the "design an experiment" section of the exam. There will be a different hypothesis.

H: If people make a fist then they will feel more power.

4.
a. Which part of the hypothesis has to be operationally defined to make an independent variable (copy it)? (2 points)

b. The treatment group would be? (3 points)

c. The control group would be? (3 points)

d. How would you operationally define the treatment and control groups (this is a different question from parts b and c above)? (5 points)

5.
a. Which design will you use (circle one: 2-group after-only, 2-group pre-post, matched, within)? Fill in the chart below. (3 points)
If a part is not in your design, put a “-” under it. For the parts in your design, fill in what you will do (for example, in our class experiment we might put “measure pre-existing love” under “Screen”).
Screen    Match    Assign    Observe    Manipulate    Observe

b. Why have you chosen this design? (4 points)

6. Assess the validity of your design.
a. What is one threat to the internal validity of the IV? How will you deal with that threat? (5 points)

b. What is one threat to the external validity of the IV? How will you deal with that threat? (5 points)

7.
a. Which part of the hypothesis has to be operationally defined to make a dependent variable (copy it)? (2 points)

b. How would you operationally define it? (3 points)

c. What is one threat to the internal validity of the DV? How will you deal with that threat? (5 points)

d. What is one threat to the external validity of the DV? How will you deal with that threat? (5 points)

Here are some more hypotheses from past exams, if you feel industrious:

H:  If people read words referring to things that occur high up in space (e.g., clouds), then they will have a more positive mood.
H:  If people wear a heavy backpack then a hill will look steeper to them.
H:  If people gaze into one another’s eyes, then they will feel more romantic attraction.

Research Methods Sample Exam 2
Will Langston