Stigma and intellectual disability: a review of related measures and future directions.

Werner et al. (2012) hunted for every scale that measures stigma toward people with intellectual disability. They read the manuals and papers for 24 tools. They asked: Do these scales rest on clear theory? Do they really capture what stigma is?

Most scales came up short. Few had strong ideas behind them. Many mixed stigma with other things like social distance or emotions. The team said we need better rulers before we can trust our numbers.

Critchfield (2015) shows one way to fix the problem. That study used sneaky, indirect questions and found more stigma than direct items. The older scales Shirli checked rarely used this trick.

Iacono et al. (2009) gives a second warning. They re-tested a popular attitude scale and found only 5 of its items work. This backs Shirli’s point: weak tools give weak answers.

Windsor et al. (2025) repeats the story in a new area. They looked at communication scales for people with ID and also found none with full proof. The pattern is the same across topics: we keep using shaky rulers.

Before you run an anti-stigma class or share survey data, open the scale’s manual. If it lacks theory or mixed items, pick a different one or add indirect questions like Critchfield (2015). Good measurement is the first step to good intervention.