https://www-ncbi-nlm-nih-gov.library.capella.edu/pmc/articles/PMC1297774/pdf/jaba00007-0023.pdf I have to know the internal external and social...

https://www-ncbi-nlm-nih-gov.library.capella.edu/pmc/articles/PMC1297774/pdf/jaba00007-0023.pdf

I have to know the internal external and social validity. I know the first two but I am not sure about the social validity. I am thinking that it has to deal with the effects the tantrums have on the other students in the classroom. Please help me understand the social validity of this article.