Experimental Design Psychology homework help

Experimental Design Psychology homework help

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For this assignment, again, it is beneficial that you keep the topic you would like to research for the capstone proposal in mind. The capstone will require a literature review for your proposal, of which you may use articles obtained during this course.

Select a peer-reviewed, experimental research study that exemplifies a two-group design (two independent groups design, two matched groups design, or repeated measures design) and a factorial design (use keywords method, results, and discussion in your Boolean search). These studies can be found using tools such as the GCU Library and Google Scholar.
In 500-750-words:

  1. Compare the two research designs
  2. Identify the independent variable(s), dependent variable, and any possible extraneous variable
  3. Identify main effects and interactions for the factorial design
  4. Explain if the study has a random sample and/or random assignment? Were there other limitations that were noticed?

Prepare this assignment according to the APA guidelines found in the APA Style Guide, located in the Student Success Center. An abstract is not required.



Capstone Proposal

DeAnna Fleming

Grand Canyon University


Professor Carter

January 9, 2022

Thesis statement: the main purpose of this paper is to discuss research designs, identify variables as well as explaining sampling and limitations.

Case studies

These particular case studies have followed an international classification of functioning, health and disability, and have studied the sensory modulation among adults who has learning disability while they are sleeping. These studies have involved one hundred and ten people with a mean age of thirty years (Sharfi, & Rosenblum n.d.). They were analyzed through questionnaires, Mann-whitey test and Chi-test. After analyzing, half of the sample had learning disabilities while the other half was a control group that had no learning disability. These studies were conducted in order to determine the relationship in the hypothesis.


The hypothesis of these studies stated that by studying the picture of how adults suffering from learning disability operates in a population will be made comprehensive. By giving every group different questionnaires from the other group as well as observing them while they were asleep, the researcher was in a position to analyze body function as well as motion. The results that the researcher obtained stated that the largest percentage of the people who had learning disabilities were not married, had no children, and attended more than one school. The researcher also stated that one of the main reasons as to why those people had learning disability is because they could have mental illnesses such as stress as well as depression. For instance, people who are incapable of bearing children are more prone to stress as well as depression than people who decide not to bear children (Sharfi & Rosenblum n.d.). Therefore, the researcher stated that these mental illnesses might be one of the key factors that could have led those people to suffer from learning disabilities. Through the findings of these studies, hypotheses were deduced to be true in that people that were suffering from learning disabilities were to be accommodated in a health care facility setting as well as in a regular population.

Limitations and problems

These case studies have some strengths as well as limitations. For instance, some of the strengths that I have learned from these studies is that using quasi-experimental design in comparison to a control group enabled some measured to be used that could also be utilized for various different types of studies on sleep as well as sensory (Sharfi, & Rosenblum n.d.). Also, the sample population that was being used in these studies was not selected randomly but were selected in a systematic manner, thus aiding the ability to match the studies not only in the future but also to the past studies that have been conducted that could help in crediting the outcomes. On the other hand, some of the limitations of these studies is that there were certain requirements in order to learn the disability among the one hundred and ten participants that had bias on the form of disability the studies were attentive too. The second limitation that I have identified from these studies was that the studies were on-self reports; therefore, there were no other measures that could have created more accurate views concerning the participant’s responses other than individual biases.


The results that the researcher obtained from these studies show that people with learning disabilities have unique characteristics that would be taken into consideration in regard to the function of the population as well as that of the society. Through the diverse relationship that an individual’s body has with the environment control and the awareness of the situation, the participants with learning disabilities showed lower quality of sleep, thus indicating that their daily participation was much affected by the learning disability that those people were suffering from.


Sharfi, K., & Rosenblum, S. (n.d.). Sensory Modulation and Sleep Quality among Adults with Learning Disabilities: A Quasi-Experimental Case-Control Design Study. PLOS ONE, 10(2).

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