Social therapy is an activity-theoretic practice developed outside of academia at the East Side Institute for Group and Short Term Psychotherapy in New York. Its primary methodologists are cofounders of the East Side Institute,
Fred Newman and
Lois Holzman. In evolution since the late 1970s, the social therapeutic approach to human development and learning is informed by a variety of intellectual traditions especially the works of
Karl Marx,
Lev Vygotsky and
Ludwig Wittgenstein.
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The kind of therapy done by the
Newman and
Holzman 's developmental centers.  "[T]he effort in the social therapy group is to transform...the actual conversation into a language-game (a performed conversation) by stripping the conversation of its truth referentiality, not by changing what is said -- having people say different things -- but by changing the truth and referential assumption of what is being said." (
Newman &
Holzman ,
The End of Knowing,Routledge, 1997, p.117 ).