PSYCH 610 Week 6 Individual Assignment Homework Exercise

  This archive file of PSYCH 610 Week 5 Individual Assignment Homework Exercise shows the solutions to the following problems: 1. What are single-case designs and when are they most useful?
2. How may a researcher enhance the generalizability of the results of a single case design?
3. What is the relationship between quasi-experiments and confounding variables? Provide an example.
4. Provide examples of: one-group posttest designs and one-group pretest and posttest designs. What are the limitations of each?
5. Provide examples of non-equivalent control group designs. What are the advantages of having a control group?
6. What is a quasi-experimental research design? Why would a researcher use a quasi-experimental design rather than a true experimental design?
7. What is the difference between a cross-sectional and a longitudinal study? What is a sequential study? Which of these designs is most vulnerable to cohort effects? Which design is most vulnerable to the effects of attrition?
8. What are the differences between: needs assessment, program assessment, process evaluation, outcome evaluation, and efficacy assessment? Why is program evaluation important to the field?
9. A researcher wants to investigate patriotic behavior across the lifespan. She samples people in the following age groups: 18
Psychology - General Psychology
 Week Four Homework Exercise

 Answer the following questions, covering material from Ch 8–10 of Methods in Behavioral Research :

 1.  What is a confounding variable and why do researchers try to eliminate confounding variables? Provide two examples of confounding variables.




2.  What are the advantages and disadvantages of posttest only design and pretest-posttest design 3.  What is meant by sensitivity of a dependent variable? 4.  What are the differences between an independent groups design and a repeated measures design? 5.  How does an experimenter’s expectations and participant expectations affect outcomes? 6.  Provide an example of a factorial design. What are the key features of a factorial design? What are the advantages of a factorial design? 7.  Describe at least four different dependent variables. 8.  What are some ways researchers can manipulate independent variables? 9.  What is the difference between main effects and interactions?

How do moderator variables impact results? Provide an example.

10.  A researcher is interested in studying the effects of story endings on preference ratings. He randomly assigns participants into two groups: predictable ending or surprise ending. He instructs them to read the story and provide preference ratings. The experimenter’s variation of story endings is a __Straightforward____ (straightforward or staged) manipulation.

11.  A researcher was interested in investigating the vocabulary skills of 6th graders in a program for gifted students. She gave a group of participants a test of vocabulary that was aimed at the 7th-grade level. She quickly discovered that there was limited variability in the scores because nearly all the students answered 90% or more of the questions correctly. This outcome is called a _Ceiling___ effect




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