Testing and Measurements for Research Essay

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Strengths

In criteria-related validity, the performance of the study is graded against a criterion that exists outside of the study construct. An example of this might be: "if we want to assess the concurrent validity of a new measure of empowerment, we might give the measure to both migrant farm workers and to the farm owners, theorizing that our measure should show that the farm owners are higher in empowerment" (Trochim, 2006, Measurement validity types).

Weaknesses

The preexisting research on which the criterion is drawn from must be valid -- for example, the research on empowerment used to create the above example study of the farm workers and migrants must be valid and not simply be based upon biases and assumptions of researchers of the past.

Construct Validity

Application: When used and when inappropriate

Construct validity refers to the question of whether the conclusion of the study accurately reflects its construct, in short whether the purpose is translated into the study's methodology into an effective manner.

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It is also called translation methodology: "This approach is definitional in nature -- it assumes you have a good detailed definition of the construct and that you can check the operationalization against it" (Trochim, 2006, Measurement validity types).

Strengths focus on methodology, study design, and study is essential to constructing a good study: also, the ideas of face and content validity are subsets of construct validity, and their strengths may be subsumed under this category (Trochim, 2006, Measurement validity types).

Weaknesses

Unfortunately, so are the weaknesses of face and content validity, such as the inherent subjectivity of face validity and the fact that if there is not a good and detailed definition of the test construct and content, such as its core definitions and subject, the validity tool is not using outside material to verify the study's validity.

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