摘要 : The author, a life member of the American Association on Mental Retardation, has reflected on over 30 years of primary engagement in mental retardation and inventoried what he believes are certain changes for the better and for th... 展开 The author, a life member of the American Association on Mental Retardation, has reflected on over 30 years of primary engagement in mental retardation and inventoried what he believes are certain changes for the better and for the worse that have occurred since the 1950s as well as certain things that have not changed. Some action implications were sketched 收起