The word 'ingroup' is correct and usable in written English.
It is a noun that refers to a group of people who share common interests, goals, or characteristics, and who identify with each other. Example: The company's employee engagement program aims to create a strong sense of ingroup among its diverse workforce.
What social scientists delicately call "ethnocentrism" and "racial resentment" and "ingroup solidarity" are defining attributes of conservative voting behavior, and help organize a familiar if not necessarily rational coalition of ideological interests.
If these promises help cement a new Democratic majority, then (to repurpose Chait's analysis) the new progressive era he envisions will depend, no less than the conservative era that preceded it, on "ethnocentrism" and "racial resentment" and "ingroup solidarity".
We can also look at this ingroup bias in a different way – by specifically counting the number of people who disagreed with government surveillance of citizens while at the same time agreeing with surveillance of foreign nationals.
However, the US stands apart as having the highest ingroup bias – nearly 1 in 3 US respondents believed their government should monitor foreign nationals while leaving citizens alone.
Again, this is consistent with an ingroup bias, together with possible fear or distrust of US intelligence activities.
Genre is a rich dialect, in which you can say certain things in a particularly satisfying way, but if it gives up connection with the general literary language it becomes a jargon, meaningful only to an ingroup.
These results suggest the presence of a social ingroup bias: surveillance is more acceptable when applied to "them" but not to "us".
So long as the fad is in full force, a sharp ingroup-outgroup sense insulates faddists against these concerns.
At best, the feminist reconstructions of various traditions, ever themselves spurring new sources of ingroups and outgroups, can serve to remind us that the work of feminism is never done.
Correlated interaction can occur as a result of spatial location (as shown above for the case of the spatial prisoner's dilemma), the structuring effect of social relations, or ingroup/outgroup membership effects, to list a few causes.
The affect-laden, relational self cannot transcend through reason its social embeddedness in a complex politics of ingroup/outgroup markers.
