Individuals who study sociolects are called sociolinguists. Sociolinguists study language variation. Sociolinguists define a sociolect by examining the social distribution of specific linguistic terms. For example, a sociolinguist would examine the use of the second person pronoun "you" for its use within the population. If one distinct social group used 'yous' as the plural form of the pronoun then this could indicate the existence of a sociolect. A sociolect is distinct from a regional dialect (regiolect) because social class rather than geographical subdivision substantiates the unique linguistic features.