As Goddard stated in 1928: "The problem of the moron is a problem of education and training ... feeblemindedness is not incurable ... [and] the feebleminded do not generally need to be segregated in institutions ... " With hindsight, some professionals discovered that persons with disabilities did benefit from education and could function in the community.

The notion of intelligence testing was also challenged and shown to be highly subjective in measuring one's ability to function in society. Still, IQ scores became permanent labels for persons with disabilities.