The social differentiation of English in Norwich . By Peter Trudgill. (Cambridge studies in linguistics, 13.) Cambridge: University Press, 1974. Pp. x, 211. $14.50.

One of the chief aims of this work is to investigate the co-variation of phonological and sociological variables. In order to measure this type of correlation, a record was first taken of each occurrence of all the variables in the four contextual styles for each informant. Index scores for each informant in each style could then be developed, and, subsequently, the mean index score for each social group calculated. [The following abbreviations are used in this chapter in relation to the social and stylistic stratification of the variable (ng): LWC — lower working-class; MWC — middle working-class; UWC — upper working-class; LMC — lower middle-class; MMC — middle middle-class; WLS — word lists; RPS — reading passages; FS — formal style; CS — casual style — Eds.] By means of these scores we are able: (i) to investigate the nature of the correlation between realisations of phonological variables and social class, social context, and sex; (ii) to discover which variables are subject to social class differentiation and which to stylistic variation; and (iii) to find out which variables are most important in signalling the social context of some linguistic interaction, or the social class of a speaker.