GDO Research Essay

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One of the biggest reasons for revisions of the GDO was to increase the validity and reliability of the test. Original versions based their sampling off of a small group of Caucasian, middle class children (Dalton, 2005; Guddemi et al, 20142; Gesell, 1925) resulting in high criticism. The Gesell Institute made an effort to make the findings of the GDO-R more generalizable. The following information concerning sampling, reliability and validity are based primarily on the findings by the Gesell Institute, published in the 2012 Technical Report. The sample used for standardization was chosen based on convenience, from schools that were already using the GDO. These consisted of 55 different schools (57% private, 43% public), in 23 states, allowing every demographic area (Northeast, Midwest, South, West). The technical report stresses that while they had intended to have states from all of these demographic areas, they were not concerned with matching the consensus data for demographics proportionally. Of the 1287 children that participated in the study there were roughly equal proportions of girls and boys, ages 3-6. The study matched US consensus …show more content…
Although it is practically impossible to avoid every single possible complication within a study, there are several measures that should have been carried out to ensure the sanctity of the research data. For example, there should have been better accounting for the presence of mentally disabled children in the sample used to standardize. Without specific knowledge of the presence of these individuals there is no way to be certain how the data could have been affected, but one would assume that their presence in the study could have lowered developmental age means. Additionally, there is little evidence that the test is able to cross cultural boundaries, yet there is a Spanish translated version of the

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