Are there two types of autism — one present from birth, and one that abruptly emerges in toddlerhood, with a rapid loss of skills? Or perhaps regression is part of a larger, normal development process? Maybe it’s not specific to autism.
Dr. Jonathan Campbell has analyzed the research and his findings are part of an article appearing on a leading autism research news site. Campbell is a professor of school psychology in the UK College of Education’s Department of Educational, School and Counseling Psychology.