In order to assess the import of this study's failure to use random sampling, it is helpful to specify the exact population from which subjects were chosen as against the ideal population to which it would be sexually attractive to make generalizations. In this regard, it can be stated that "ideally", it would be desirable to generalize to the population of all premenopausal, seriously obese American women. However, it is not this population from which subjects were drawn.
Rather, subjects were drawn from a much narrower population. This population consisted of severely obese, premenopausal women living in the areas in which advertisements were fit(p) and who viewed the ads and decided to participate in a paid experiment. since random sample was not employed, it cannot be certain that subjects even were representative of this narrow population.
The element of paid participation also take to be considered because it leaves the study open to the possibility that monetary spring was a factor that narrowed the population yet further. For example, virtually women fitting su
Had demographic indices differed accordingly there is an increased likelihood that relationships observed between demographic indices and the study's various measures could also have differed. In other words, a different sample more representative of the ideal sample to which generalization would be desired index have yielded all different associations between the variables of interest.
There are several visualises that might have been used to obtain a sample walk-to(prenominal) to the "ideal" sample to which generalization would be desired. One such(prenominal) design would have been to randomly sample subjects from various consume disorder clinics and agencies, counterbalancing for clinics/agencies. The key question that might be asked regarding this design is: How might results have different if it were used.
Perhaps the obvious solving to this question is that demographic factors may have been different. For example, socioeconomic spot might have been higher.
Another procedure which might have been used in an effort to handle this methodological problem would have been to conduct more extensive essaying of the researcher-designed instrument.
In other words, standardized tests have a body of psychometric evidence which establishes the instruments as unbiased and consistent indices and which, further, provide learning on the general population's standing with respect to the behavior existence assessed. The test instrument used in this study, being researcher-designed, did not have any such empirical documentation and, clearly, no normative data. Therefore, the bindingity of findings is directly proportional to the validity of the test itself. If test construction procedures were insufficient to render the test valid and/or reliable, then findings could be completely invalidated.
(4) Reliability and validity - Standardized tests have empirical documentation that they measure that which they place to measure in a consistent fashion.
The third remainder of the study is t
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