TABLE 1.

Summary of the analyses, and the hypothesized directions, to test the (convergent) validity of the ADAPT

Hypothesis	Groups/participants used to test the hypothesis	Statistical test used
1. Clients who receive care from institutions providing ID care, have significantly lower ADAPT scores compared to people from the general population who function independently in society	ADAPT scores from 2081 clients receiving care from ID institutions, versus 129 persons from the general population	t‐test
2. People with higher IQ scores have higher ADAPT scores than people with lower IQ scores	1,378 participants for whom the IQ group was reported, divided into the following groups: moderate ID (n = 261), mild ID (n = 617), borderline IF (n = 440) and zero to one SD below‐average intelligence (n = 60).	ANOVA 95% confidence intervals Pearson's r correlation between IQ and ADAPT scores
3. People with higher levels of education on average have higher ADAPT scores than people with lower levels of education	1,894 participants for whom the educational level was known	ANOVA
4. People who receive more care and live less independently on average will have lower ADAPT scores	2,018 participants for whom the living conditions were known, categorized into: living independently without any support (n = 238); living with ambulatory support (n = 351); living in a facility with daytime support only (n = 70); living with parents (n = 334); and living in a facility with full time, 24/7, support (n = 1025)	ANOVA
5. Clients who have (a) psychiatric disorder(s) on average have lower ADAPT scores than people without psychiatric comorbidity	ADAPT scores from the 2079 clients, with (n = 1017) or without (n = 1062) psychiatric comorbidity (n = 2079), split into the IQ groups of moderate ID, mild ID and borderline IF	t‐tests