Review evaluates psychometric properties of Swedish autism-specific and general genetic counselling outcome measures

This methodological evaluation reviews the psychometric properties of two instruments: the Swedish autism-specific mGCOS-24 and the Swedish general GCOS-24. The assessment utilized Rasch analysis to evaluate measurement properties within a population of Swedish patients receiving genetic counselling. The study focuses on the structural validity and measurement characteristics of these tools rather than clinical efficacy or patient outcomes.

Key findings indicate that the Swedish autism-specific mGCOS-24 identified subscales with acceptable measurement properties. Conversely, the Swedish general GCOS-24 did not resolve broader limitations when applying the same structure. The authors explicitly caution against interpreting 'acceptable measurement properties' as clinical validation or assuming specific demographic details beyond the 'Swedish' designation.

The review highlights significant structural challenges, including multidimensionality, disordered thresholds, local item dependence, and invariance issues affecting both instruments. These limitations suggest that current measures may not fully capture outcomes of genetic counselling in autistic populations. The authors conclude that findings highlight important opportunities for measure refinement but also indicate that new or more substantially adapted tools may be needed.