This article explains language variations and behavioral differences with the presence of a large group and without the presence of a group at all.

This article explains why teenagers are, in fact, not affecting the evolution of language as drastically as we initially thought.

This article describes the relative effect of language internal and external factors on the number of cases in the world's languages. It considers model population size and the proportion of second language speakers in the speech community as sociolinguistic predictors, and other factors that have recently been suggested to influence typological and sociolinguistic language variations.

How environmental factors come to shape the emergence of linguistic This article describes how environmental motivations drive the emergence of different communicative conventions.