Learn English – Word for “self-reinforcing [beliefs]”

single-word-requests

I want to describe a group of people who are experiencing a kind of “echo chamber” effect, reinforcing each other’s beliefs, e.g.:

The clique tends to have a ____ culture: once someone suggests an idea, the whole group clings on to it.

I’m gravitating towards self-reinforcing and self-feeding, but these both sound hopelessly off the mark.

Best Answer

Reading the Wikipedia article on Echo chamber (media), I found this line:

Another emerging term for this echoing and homogenizing effect on the Internet within social communities is cultural tribalism.

Tribalism — ODO

noun 1.1 derogatory The behaviour and attitudes that stem from strong loyalty to one's own tribe or social group
"a society motivated by cultural tribalism"

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