Experimental Design and Validity Reversal Design From the articles in the article bank in the Updates and Handouts section, choose one that demonstrates reversal design and complete the following. APA citation Full APA citation here. Strengths $1.$ Reversal designs tend to demonstrate functional relationships between both independent and dependent variables. $2.$ Several variations to fit the study and meet the needs of the research questions asked. Limitations $1.$ Possibility of sequence effects $2.$ Irreversibility which puts strain on learned behaviors which may be difficult or resistant in unlearning. External Validity The degree of which the results of a study are generalized to other behaviors, subjects, and settings. $.$ Then explain how external validity was present or absent with support from the article. Internal Validity The degree of which the study$$s dependent variable is functionally related to the treatment variable. Then explain how internal validity was present or absent with support from the article. Social Validity The degree in which the findings of a study; methods, objectives, and results produce acceptable to the involved population. $.$ Then explain how social validity was present or absent with support from the article.