 He goes on to suggest that, in contrast, a positive role, such as that of “developing person” would give rise to more positive expectations, perceptions, and treatment, such as better residential arrangements and more valued activities.Thus, membership in a devalued group and the attribution of such stereotypical roles has a profound impact on how people are perceived and treated.As Wolfensberger's definition of the principle of normalization evolved, he came to the conclusion that social roles were a key construct that allowed for a parsimonious statement of means and goals.