It is to be noted that normalisation did not talk about 'making people normal'" (Errol, 2006d) which later was criticised by Wolf Wolfensberger in his 'Social role valorisation' (SRV) theory.
SRV theory defines the relationship between socially valued and feeble people by raising the moral and consciousness among them. The SRV social model ideas differ from other explanations of disability in offering a social rather than an individual deficit approach to explain the oppression that disabled people are confronted to. However, it is acknowledged that individual model accounts remain influential in disability in a sense that it provides those explanations for disabled people's experience, which are particularly contested in the lives of people with learning difficulties. In this respect, theories of Normalization and Social Role Valorisation (SRV) have influenced not only the perception of majority but also the development of policy and practice for decades. "In comparison to the normalization, SRV focus on the life experiences of people with learning difficulties, social model accounts have in the past been rightly criticized for failing to fully incorporate analysis of such experiences into their explanations for, and challenges to, disabled people's oppression" (Tregaskis, 2004, p.13)
In fact, a review of social model and normalization/SRV explanations of discrimination suggests significant similarity in their explanations of the ways in which society culturally discriminates against disabled people, and what effects this process may have on them. However, these accounts then differ radically when it comes to developing approaches to achieving change aimed at improving disabled people's lives.
"The social model advocates a holistic structural barrier approach which focuses on bringing about change to the structure of society so that people with impairments are no longer viewed as an unproductive drain on resources who face inevitable discrimination as a result. Normalization/SRV as implemented in Britain, views it in a more realistic way to concentrate on improving the lives of disabled people and those having problem with learning difficulties by encouraging their assimilation within the mainstream as a means of improving their life chances; and views as well-meaning but unrealistic any attempt to achieve wider social change". (Tregaskis, 2004, p.13)
Thus normalization/SRV has been described as a relatively static and conservative theory, in that it makes certain assumptions that things will always remain the same, and does not critically evaluate or challenge the power relations inherent in professional-service user relationships which may actually make it difficult for disabled people to take control of their lives in the way that the normalization/SRV approach advocates. However, by carrying on with the devaluation of difference and encouraging conformity to existing normative values around