And they appeal to recent research with serious methodological flaws that purports to demonstrate that district preschool programs in places such as Tulsa and the Abbott districts in New Jersey are effective. (educationnext.org)
A common challenge we found in our review is that many studies suffer from serious methodological flaws. (readcharlotte.org)
The Canadians, McIntyre and McKitrick, then published a paper purporting to uncover serious methodological flaws and problems with data sets used. (grist.org)