A second stage of the work that underpins this guide was to explore and evaluate the feasibility of deriving retrospectively harmonised measures of cognition. Selected learning from this work is summarised here and full details of the retrospective harmonisation approach established and learnings achieved are available in the report below.
In assessing this feasibility, few occasions were identified where the same cognitive tests were measured. However, in some instances different measures did assess potentially comparable aspects of cognition, i.e. similar domains of cognitive ability.
Consequently, tables of overlapping measures and cognitive constructs in the British birth cohorts were produced which can help aid the selection of tests that might be candidates for retrospective harmonisation.
These tables were created using the Cattell-Horn-Carroll (CHC) model of cognitive ability, as set out in the introductory section of this guide.
