quantatative research homework

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1.Jackson (2012) even-numbered Chapter Exercises (p. 244).

·  2. You read in a health magazine about a study in which a new therapy technique for depression was examined. A group of depressed individuals volunteered to participate in the study, which lasted 9 months. There were 50 subjects at the beginning of the study and 29 at the end of the 9 months. The researchers claimed that of those who completed the program, 85%improved. What possible confounds can you identify in this study?

·  4. What are internal validity and external validity, and why are they so important to researchers?

·  6. What are the similarities and differences between within-subjects and matched-subjects

2.What is the purpose of conducting an experiment? How does an experimental design accomplish its purpose?

3.What are the advantages and disadvantages of an experimental design in a business study?

4.What is more important in an experimental study, designing the study in order to make strong internal validity claims or strong external validity claims? Why?

5.In an experiment, what is a control? What is the purpose of a control group? Of single or multiple comparison groups?

6.What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.

7.What does “cause” mean and why is it an important concept in research? How are correlation and causation related?

8.You are a researcher interested in addressing the question: does smiling cause mood to rise (i.e., become more positive)? Sketch between-participants, within-participants, and matched-participants designs that address this question and discuss the advantages and disadvantages of each to yielding data that help you answer the question. Describe and discuss each design in 4-5 sentences.

Support your paper with a minimum of 5 resources. In addition to these specified resources, other appropriate scholarly resources, including older articles, may be included.

Length: 5-7 pages not including title and reference pages

References: Minimum of 5 scholarly resources.

Your paper should demonstrate thoughtful consideration of the ideas and concepts that are presented in the course and provide new thoughts and insights relating directly to this topic. Your paper should reflect scholarly writing and current APA standards.

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Question: Jackson (2012) even-numbered Chapter Exercises (p. 244).

Possible confound of the study.
The study appears to be very uncontrolled. The openness predisposes the research to a
number of factors that have potential to affect research findings yet they are not accounted for. In
the first place the research is was done over a relatively longer period of time. Individual are
bound to significantly change emotionally and psychically before nine months. It would be fair
enough to consider nine months as a period long enough for a subject to have recovered from
depression, advanced their depression maybe to unmanageable level for example to commit
suicide or to have undergone a major life change like changing their home town (Rutherford,
Quinn, & Mathur, 2004). In addition, there was no control group for the experiment.

Explaining the meaning of internal validity
Internal validity by definition is the situation where a researcher obtains an accurate
finding are conclusion based on the causality theory in the current era people gives to a person.
Internal validity acts as a motivator in research. The main purpose of conducting a research is
tied to the ability for a scholar to intervene in a situation. A researcher is interested in explaining
scenarios, and predict and controlling the happenings of the environment around
external validity, is on the other hand a scenario when a researcher is interested in conducting a
research with the motive of finding out some truth in a wider concept or when interested in
finding out when using external locus in order to control or find out the truth. This motive is
termed as naive and highly tempting motivator behind undertaking a research. The standard

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definition of external validity is the need to study other people who are elsewhere at different in
terms of time.
Differences when comparing within-subjects and matched-subjects.
similarities - A most noticeable similarity which exists when comparing within-subjects
design and matched-subjects design can be termed as the statistical power, the main achievement
of redden of minimizing the variability between participants. In the within-subjects design this is
due to the same participants acting as both control and experimental groups. while dealing with
matched-subjects design variability is reduced because subjects are matched based on...

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