Midterm Questions

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This is a Collaborative Learning Community (CLC) assignment. Before beginning this assignment, each group should submit a filled-in copy of the CLC Agreement Form. Each CLC team will design a quasi or a true experimental study, investigating the impact of the independent variable on the dependent variable. Address the following in 500-750 words: Design either a quasi or experimental study to investigate the variables. What is the hypothesis? Describe the types of hypotheses with respect to testing. What does the experimental method allow that the correlation design does not?
Identify the independent variable. Identify the dependent variable.
Describe how the group will define operationally and measure the variables.
Describe how the group will obtain a random sample of participants.
Discuss how the group will ensure the study has high internal validity. Will the subjects be assigned randomly to the groups? Why or why not.
Are there any ethical concerns about the treatment of participants emerging from the experiment?
Consider the data presented, would you use t or F score? Why? include the appropriate effect size.
Submit an SPSS output for the quasi or true experimental study.
Include at least two to four scholarly sources.While APA style is not required for the body of this assignment, solid academic writing is expected and in-text citations and references should be presented using APA documentation guidelines, which can be found in the APA Style Guide, located in the Student Success Center.This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.You are required to submit this assignment to Turnitin. Please refer to the directions in the Student Success Center.Midterm QuestionsQuestion 1For 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.1.Dr. G rejects the null hypothesis although the independent variable had no effect.
2.Dr. R rejects the null hypothesis when it is false.
3.Although the independent variable had an effect, Dr. E does not reject the null hypothesisQuestion 2
Explain the value of reversal designs (ABA designs) in single-case research.
Question 3
explain how a one-way analysis of variance works. How do you use between- and within-group variability?
Question 4
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 “unfun” 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?
Question 5
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 μ of 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)
Question 6
Describe a two-matched groups design. How is the matching done?
Question 7
Chuck Wagon is very excited about the within-subjects approach. “Now I’ll never need to run large numbers of subjects again,” he says. However, Chuck has forgotten that within-subjects designs may be a) useless, b) impossible, c) confounded by order effects, or d) impractical when excessive subject time spent in an experiment makes data inaccurate. Give an example of each of these four objections.
Question 8A researcher has studied subjects’ ability to learn to translate words into Morse code. He has experimented with two treatment conditions: in one condition, the subjects are given massed practice; they spend 8 full hours on the task. In the other condition, subjects are given distributed practice; they also spend 8 hours, but their practice is spread over four days, practicing 2 hours at a time. After the practice, all subjects are given a test message to encode; the dependent variable is the number of errors made. The researcher has matched the subjects on intelligence. The results are in the following table. Decide which statistical test would be appropriate, carry out the test, and evaluate the outcome. Assume a significance level of .05 and that the direction of the outcome has not been predicted.
Question 9
Explain the pros and cons of longitudinal, cross-sectional, and sequential designs.
Question 10
Define the term quasi-experiment and discuss the pros and cons of this research method.