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Running Head: ARTICLE CRITIQUE1Article Critique: Part 3Blair CaswellBall State University
ARTICLE CRITIQUE1.In your own words, define internal validity and external validity Internal validity, to me, means how well was the experiment done. Were there other variables that could have had an influence on the behavior being changed? According to Ledford and Gast (2018), internal validity is defined as: “ensuring that outcomes are related to your intervention procedures rather than extraneous factors (p. 4).” An example would be if a principle is trying to increase the 3rdgrade math scores on the state tests, he would implement a new math program, butwhat if some students are getting help outside of school, like a tutor. If their math scores increase, did the new math program help increase the scores or did the outside tutor help? External validity, to me, means can the behaviors be generalized outside of the study. According to Ledford and Gast (2018), external validity is defined as: “degree to which outcomes from a study are likely generalizable outside of the study context (p. 78).” An example would be, if a researcher is trying to increase the behavior of wait time for a client, and he/she can wait for up to 5 minutes,

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