Universes & Reception Types

July 1st 2022

Please note that the July 2022 universes incorporate a methodology change and the updated methodology may result in a small step change for certain demographics.

The key change relates to the number of Establishment Survey waves used to calculate the universes. All universes from July 2022 onwards will be produced using a four-wave weighted approach. The change has been introduced to reduce volatility for certain demographics while maintaining recency (as the four-wave weighted approach upweights the latest waves).

Aside from the methodology change, a number of additional measures were taken in the latest Establishment Survey fieldwork wave to improve the accuracy of coding in relation to the number of TV sets in households. The measures were successful and resulted in some significant step changes in the universe estimates for those particular demographics.



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