psy-550-research-methods-final-exam

total of 10 questions. exam is 2 hours long. questions aren’t available until exam is opened.

possible exam questions….

Explain the pros and cons of longitudinal, cross-sectional, and sequential designs.

Bill Board is “lording” his SAT score over his friend, Rhoda Dendron, who took the ACT. “You only got a 25 in math,” he chortled, “while I got a 300 in math.” Given that the SAT has a μof 500 and a σ of 100, and the ACT has a μ of 20 and a σ of 5, what is wrong with Bill’s logic (give the answer in both z scores and percentile ranks).

Define the term quasi-experimentand discuss the pros and cons of this research method.

After watching nursery-school children, Ken Garoo wants to test the hypothesis that some toys are more fun to play with than others. He decides to compare “fun” toys (blocks) with toys (stuffed animals). He also wishes to see if there is a sex difference, as well, so sex is added as an independent variable.

A) What kind of design is needed?

B) Diagram it out.

C) Assuming 20 subjects are needed per cell, how many subjects are needed for this study?

Explain how a one-way analysis of variance works. How do you use between- and within-group variability?

Explain the value of reversal designs (ABA designs) in single-case research.

For each of the following examples, explain whether the researcher has made a correct decision or has made a Type 1 or Type 2 error. Explain why.

Dr. G rejects the null hypothesis although the independent variable had no effect.

Dr. R rejects the null hypothesis when it is false

Although the independent variable had an effect, Dr. E does not reject the null hypothesis.