New interview and observation measures of the broader autism phenotype: group differentiation.

de Jonge et al. (2015) built new interview and observation tools. They wanted to see if the tools could spot the broader autism phenotype in parents.

They compared two groups: parents of kids with autism and parents of kids with Down syndrome. They looked at how well the new tools told the groups apart.

The new measures worked. They clearly split the autism-parent group from the Down-syndrome-parent group.

Fathers showed the split more strongly than mothers. The tools caught autism-like traits better in dads.

Cox et al. (2015) tested the exact same interview battery and found it stayed consistent over time. Together the two papers show the tool is both reliable and valid.

Emerson et al. (2007) created the Broad Autism Phenotype Questionnaire, a quick checklist. Maretha’s new interview goes deeper but takes longer. You pick speed or depth.

Muller et al. (2022) adds a warning: parents who score high on any BAP measure tend to over-rate autism symptoms in their kids. Check parent BAP status before you trust caregiver reports.

If you need to know whether subtle autism traits run in a family, these interview tools give richer data than a checklist. Start with dads; the signal is clearer. Always pair parent reports with teacher or clinician data to avoid BAP-driven inflation. The tool is still new, so cross-validate with Down syndrome or other groups before using it alone.