Sentences with phrase «methodological flaws in this study»

Yet economists Dale Ballou and Michael Podgursky identified significant methodological flaws in this study.

I've written previously about methodological flaws in these studies, the most important being that researchers compared children who successfully completed the pre-K program and were just entering kindergarten (the program group), with children who were just starting the pre-k program (the control group), adjusting statistically for the age difference in the two groups.

He said that the journal's peer review procedure failed to identify methodological flaws in the study.

Not exact matches

Researchers supporting co-parenting identified a number of fundamental methodological flaws of recent studies that challenge co-parenting of infants and young children: the failure to interview both parents, small and non-representative samples and use of unreliable and invalid measures, and the fact that even these studies have actually found no significant differences in child outcomes in single versus co-parenting families.

A common challenge we found in our review is that many studies suffer from serious methodological flaws.

Many of those evaluations — in New York City, Dayton, Ohio, and Washington, D.C., as well as in the states of Florida, Minnesota, and Louisiana — reported a modest increase or neutral impact on student achievement and graduation rates.9 The findings of some of these studies, however, have more recently been called into question as methodological flaws were discovered when adding additional years or replicating the study.10 As a result, recent voucher program evaluations employ more rigorous research methods such as experimental and quasi-experimental designs and refine their use of certain variables.

But as outlined in a report published this month based on newer data from ISO - NE, ISO - NE's original study suffered from methodological and data - based flaws that render its results erroneous.

«Questions have been raised, according to a February 14, 2005, article in The Wall Street Journal, about the significance of methodological flaws and data errors in your studies of the historical records of temperatures and climate change.»

Take, for example, the Nov - Dec 2000 issue of Child Development, in which at least 10 of the 15 empirical studies published employ one or another of the methodological features that Nock rejects as «fatal flaws.»