> 'such a deleterious effect' This phrasing is really not accurate. It's a small difference, trivial, dwarfed by things like socioeconomic status, educational

> 'such a deleterious effect' This phrasing is really not accurate. It's a small difference, trivial, dwarfed by things like socioeconomic status, educational opportunities, rearing environment quality, presence of an alcoholic parent, nationality etc.