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It would be expected that the children would push for increased recess time. Note that no mention was made regarding diet. Also note that this specific class was selected by the principal therefore objectivity is further corrupted.
However, use of the focus groups as means of gathering information may have been more advantageous in regards to the other 2 groups (parents and staff / teachers) since it prompts thought on the matter and inter-communications that yields discoveries on the matter and ideas about how to improve the situation. The idea about the parent volunteers, for instance, could best have emerged in a focus group environment. (Albrecht et al., 1993).
There, too, could have interviewer / facilitator bias and confounding details involved. The two trained moderators were Caucasian whereas the population was of mixed ethnic origin. Nuance of different cultural approach could have been overlooked and cultural misunderstanding involved. The two facilitators were also subjectively involved in the sessions. The transcripts, therefore, should have been reviewed and coded by individuals other than they; these individuals would have bee more objective to the procedure. Although the team reviewing the themes followed review, the entire study, based on only one small and slanted population and violating too many coda of objectivity, seems insufficiently scientific to me. All of this corrupts the validity of the study (i.e. The scientific soundness and accuracy of the study itself).
Finally, researchers focused on obesity in the school as exclusive to obesity prompted by homes and/or by factors outside...
Researchers have proposed various reasons for the dramatic increase in child obesity in America over the last few decades (since the early 1980s). Some of the reasons given include an over-abundance of food availability in America's supermarkets and restaurants, particularly fast-food restaurants (Wang, & Lobenstein, 2006); the uncontrolled or unreasonable portion-sizes in America's restaurants (ibid.); and an over-abundance of high-fat food choices paired with a lack of palpable low-fat choices. Other factors include the appeal of sedentary entertainment options, manifested by (for instance) television, video games and computers. The home environment is as much involved in obesity factors as is the school and investigation should be conducted likewise into these variables.
References
Albrecht, R., Johnson., J., & Walther, J. (1993). "Understanding communication process in focus groups," in D.L. Morgan (ed.) Successful focus groups. Long: Sage.
Asch, S. (1955) "Opinions and Social Pressure"
http://www.panarchy.org/asch/social.pressure.1955.html
Breakwell, G., Hammond, S., & Fife-Schaw, C. (2007). Research methods in Psychology. Sage: London.
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