“…"This caution is perhapsdue to the fact that the authors kept their interpretation to the total T scores. Yet, if one examines individual test results some interesting conclusions emerge, conclusions which, in fact, are closely parallel to the findings of a previous investigation, based on much smaller numbers, by Vernon, O'Gorman and McLellan (1955).In the National Survey of Health and Development analysis, the Scottish children were inferior to the English (here includes the Welsh) in non-verbal and verbal reasoning tests a t all ages, except in verbal reasoning at 15. These differences are repeated inside classes, except in one case (middle class 8-year-old children-no difference).…”