marathon group

American  

noun

Psychology.

1. an encounter group that meets for an extended period of time, as eight hours to a week, in the belief that the resultant intensity and intimacy will lead to a more open expression of feelings.

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marathon group British  

noun

1. (in psychotherapy) an encounter group that lasts for many hours or days

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Example Sentences

"I have seen in the Facebook London Marathon group that quite a few people have deferred their place to April because they just can't face traveling down when there are train strikes on."

From BBC

The SEC temporarily suspended trading of Marathon Group Corp, Affinity Beverage Group Inc, and Sylios Corp beginning on Friday and ending on March 4, the SEC said in statements published on its website.

From Reuters

Nelson likens it to “a marathon group therapy session”.

From The Guardian

For three days, they relived their worst cases and unloaded their frustrations, in scenes that played out like marathon group therapy, for which they have no time.

From The Guardian

He loves getting a medal - now, he’ll have two to hang in his room - and he would even like to help start a kids’ marathon group at his school.

From Washington Times