Validating copyrighted surveys
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Initial validation using student populations was followed up by the inclusion of WEMWBS in two national Scottish surveys (2006 September wave of the Health Education Population Survey (HEPS) and the 2006 Well? Information on this research and WEMWBS is contained in the following: Further psychometric analysis tested the internal construct validity of WEMWBS from the perspective of the Rasch measurement model.
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In this way, direct mapping is akin to ‘painting by numbers’ as it imposes an attribute on a pre-defined area.
However, in ‘modelled’ mapping, the initial segmentation of the survey area merely directs the placement of the ground-truth sampling effort.