Evaluating Internal, External and Construct Validity

Feb 3rd, 2012
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Internal validity associated with a specific experimental research can be evaluated according to two criteria. The first criterion is an assessment of how well the research study was conducted. For instance, how variables were used when evaluating the number of in-house employees (Martyn, 2009).

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Evaluating Internal, External and Construct Validity PaperStudent's NameProfessor's NameAffiliationDateEvaluating Internal, External and Construct ValidityInternal ValidityInternal validity associated with a specific experimental research can be evaluated according to two criteria. The first criterion is an assessment of how well the research study was conducted. For instance, how variables were used when evaluating the number of in-house employees (Martyn, 2009). The second criterion deals with the confident verification that the dependent variables in the research study were produced fully from the independent variables, and are not subject to any extraneous values. In group assessment studies, internal validity is used to create a distinction between the experimental and control groups (Martyn, 2009). In single-subject research studies, internal validity analysis the true causes of change in the subject's mannerism (Martyn, 2009). In descriptive research studies, internal validity is used to assess the quality and accuracy of the study. According to Campbell and Stanley, the most influential extraneous factor that affects internal validity is history. History refers to the individual experiences of research subjects (Martyn, 2009). The compounding of these individual experiences is bound to affect the responses of research subjects. Research studies that employ the use of lengthy and repeated research measures are more affected by history variables t

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