Sexual knowledge interview schedule: reliability.

The team built a 46-question interview called SKIS. It asks adults with intellectual disability about sex, birth control, and abuse.

Two staff gave the same interview to 30 clients. They repeated it two weeks later to check if answers stayed the same.

SKIS scored 0.78-0.96 on internal consistency. That means the questions hang together well.

Two raters agreed 95 % of the time. Test-retest was 70 %, which is okay for a knowledge quiz.

McKenzie et al. (2015) also got high rater agreement with the LDSQ screen. Both papers show ID tools can be reliable when staff follow a script.

Lancioni et al. (2008) found the opposite: visual inspection of FA graphs only hit moderate agreement. The difference is method: SKIS uses fixed questions, while graph reading is subjective.

Chiviacowsky et al. (2013) warn that even good scale-level alpha can hide weak single items. SKIS did not report item data, so you should still watch for shaky questions during use.

You now have a quick, reliable way to spot gaps in sexual knowledge before teaching safer-sex or abuse-prevention lessons. Give the 46 items yourself, then let a second staff do the same interview. If scores differ by more than a few points, re-train on wording. Use the first SKIS score to pick lesson targets, then repeat the tool every six months to show change.