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Single-Subject Design

Oct 31, 2018 | 0 comments

Oct 31, 2018 | Essays | 0 comments

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Single-Subject Design


Outpatient individual and family therapy


A young male reports suffering from various odd psychological and physical symptoms due to a dog’s attack on him.

Single subject design

A very good and clear example that he gave us was that, for a week he was not capable of taking any kind of solid foods. As he went on to explain, he insinuated that, he would only take the kind of meal that he desired but the very moment his tongue came into contact with it, he would not take it. He depended majorly on fruits like water melon which assisted in minimizing his endless desires which could not be met. He explained this effect was from an experience he had at a friend’s place and a fierce dog attacked him. This therefore led to his trauma where he could not take solid foods. Every time he tried taking solid foods, the memory of that incident came back to him.

Study design

The study design that will be used in this case is multiple-baseline designs (Horner, 2005). The subject will be assisted in different ways to help overcome the trauma he is going through.


The various symptoms of this subject will be established by experimental analysis of his behavior (Kazdin, 2011). In this case, this client will be given solid food and how he behaves when it is handed to him will be noted. This will assist when it comes to concluding on the best treatment for him.


This subject’s intervention will need at least five weeks of therapy in order to see if he has any progress in his eating. There will be a reassessment of his symptoms after the five weeks of therapy and in case it has improved, he will be asked to continue with therapy for another two weeks to ensure the results are consistent. 


Horner, R. H., Carr, E. G., Halle, J., McGee, G., Odom, S., & Wolery, M. (2005). The use of single-subject research to identify evidence-based practice in special education. Exceptional children, 71(2), 165-179.

Kazdin, A. E. (2011). Single-case research designs: Methods for clinical and applied settings. Oxford University Press.




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