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Results
#1. Jay implements an intervention to teach a client independent dressing skills. The client begins dressing themselves independently, which is a positive outcome. However, Jay later discovers that the client’s parents were also working on dressing at home, and the client may have watched instructional videos online. Based on this information, what critical aspect does Jay’s intervention most likely lack?
Internal validity refers to the extent to which an experiment demonstrates that the independent variable the intervention in this case Jays teaching is solely responsible for the observed changes in the dependent variable the clients independent dressing and not other extraneous confounding factors In Jays scenario the presence of multiple potential influences on the clients behavior parents teaching YouTube videos makes it difficult to definitively conclude that Jays intervention alone caused the observed improvement This lack of certainty regarding the causal relationship between the intervention and the behavior change indicates a lack of internal validity External validity by contrast refers to the generalizability of research findings to other settings populations or conditions which is not the primary issue here Social validity pertains to the social significance of the target behavior the appropriateness of the intervention procedures and the overall impact of the behavior change independent dressing is typically a socially valid skill Observer validity often referring to interobserver agreement or IOA relates to the consistency and accuracy of data collection among different observers which is a measurement concern not a concern about the source of behavior change itself
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