TGI and its uses in demography

Readers of Admap will be familiar with the Target Group Index (TGI). The TGI sample is derived from a sample stratified on a rolling ACORN basis: geodemographics are used to guide interviewers as to the streets in which to conduct the face-to-face omnibus interviews, the vehicle by which the TGI questionnaire is placed.

TGI and its use in geodemography

Better discrimination and finer targeting are now possible

Richard Silman and Andrew Brown

Readers of Admap will be familiar with the Target Group Index (TGI). The TGI sample is derived from a sample stratified on a rolling ACORN basis: in other words, geodemographics are used to guide interviewers as to which streets to conduct the face-to-face omnibus interviews, the vehicle by which the TGI questionnaire is placed. This article explains how, via the postcode link, TGI respondents can be matched with their relevant geographical cluster group, whilst retaining their anonymity. BMRB's new...

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