In the present article author analyzes the concept of "intellectual backwardness", and also history of its emergence. Author emphasizes that in many respects the concept of "intellectual backwardness" is synonymous to concept of "mental retardation", however the last slightly more widely and includes the delays caused by social and pedagogical neglect. However, it is important to distinguish intellectual backwardness from the acquired weak-mindedness (dementia). In the article author analyzes distinctions, and also analyzes history of researches in the field.
criminal, backwardness, intellectual remained, dementia, law, legislation, researches, distinctions.