Sentences with phrase «found weak evidence»

In 2007, Ozkan Eren and Daniel Millimet examined the limited variation that does exist across American states and found weak evidence that longer school years improve math and reading test scores.

They also found weak evidence that botulinum toxin, the anti-seizure drugs pregabalin and oxcarbazepine, as well as drugs classified as tricyclic antidepressants and atypical opioids were probably effective in reducing pain.

We find some weak evidence that charter schools are improving.

Not exact matches

«Even the authors of this study admit that they failed to find any cause and effect, and provide weak scientific evidence to support their contention.

Gouldey (2005) says, «Statistically significant evidence is found that the market is not weak - form efficient and that speculative profits (after transaction costs) can be earned using the information set based only on quoted betting and realized point spreads.»

Besides the 2013 University of Washington study, a number of other recent studies have found education ineffective in improving self - reporting by athletes, adding to a growing body of evidence challenging the conventional wisdom that inadequate athlete concussion knowledge is the principal barrier to increased reporting, and suggesting that one of the best ways to combat underreporting by athletes of concussion symptoms may be to shift the focus of educational efforts towards helping coaches facilitate concussion reporting, the theory being that athletes will be more likely to report concussion symptoms if they no longer think that they will be punished by the coach for reporting, such as by losing playing time or their starting position, perceived by their teammates as letting them down, or viewed by their coach as «weak,» all of which have been documented in numerous studies over the past decade as reasons athletes are reluctant to report concussion symptoms.

In child attention at five years of age, weak evidence was found (one study) favouring the supplementation.

Jim was determined to find answers over why the rear facing information in US is so weak considering there has been overwhelming peer reviewed research and evidence for a large number of years.

«The findings from DFID - commissioned research published in recent years indicates that there is weak evidence that market competition enhances the quality of schools in the private or public sectors.

«US cancer treatment guidelines «often based on weak evidence»: Findings question the underlying evidence for current guidelines.»

The researchers, led by Dr Vinay Prasad at Oregon Health & Science University, say their findings «raise concern that the NCCN justifies the coverage of costly, toxic cancer drugs based on weak evidence.»

The different tests had highly variable results, but overall, most studies from both 2003 - 2004 and 2013 - 2014 appeared to have some real (though weak) evidence to support their findings.

Though the evidence was weaker, the researchers also found that massage therapy, spinal manipulation, and osteopathic manipulation may provide some help for back pain, and relaxation approaches and tai chi might help people with fibromyalgia.

Hatzes first removed the strongest of any periodic signals, not necessarily just those tied to the star's rotation, and found only weak evidence for Bb.

Phytoplankton production is enhanced by strong winds (because they cause upwelling of nutrients from deeper waters) and diminished by weaker winds, and the scientists found evidence that trade winds were weaker then.

In the paper «Banning Smoking In Parks and on Beaches: Science, Policy, and the Politics of Denormalization,» published in the July issue of the journal Health Affairs, researchers at Columbia University's Mailman School of Public Health analyzed the evidence for these claims and found them to be far from definitive and, in some cases, weak.

But the strength of the association found was weak, and further evidence has since emerged, prompting the authors to carry out a systematic review of research published up to 2015.

In some studies done (Reddell and colleagues, 1992, Mitchell and colleagues, 1994, Wassell and colleagues, 2000) they found evidence that use of belts for workers already injured might slightly benefit from belts to prevent re-injury, but the evidence is weak.

The modest or weak evidence of these dietary exposures is mostly consistent with the findings of RCTs, although RCTs have yet to be conducted for several factors.

In addition, we found modest evidence to support a causal relationship for intake of fish, marine ω - 3 fatty acids, folate, whole grains, dietary vitamins E and C and beta carotene, alcohol, fruits, and fiber, and weak evidence of causation for intake of supplementary vitamin E and ascorbic acid, saturated and polyunsaturated fatty acids and total fat, α - linolenic acid, meat, eggs, and milk.

It's become widely accepted in the movie industry that the weakest weekend of the year is always that of Labor Day and one needs to look no further for evidence of that than the fact that this year's one new wide release on Friday was the dismal found - footage horror flick As Above, So Below (the almost equally subpar November Man got a jump on proceedings by releasing two days prior though that didn't help it any).

The Great Stagnation of American Education New York Times, 9/7/13» [Professor] Richard J. Murnane, an educational economist at Harvard, has found evidence that high school and college completion rates have begun to rise again, although part of this may be a result of weak labor markets that induce students to stay in school rather than face unemployment.»

He specifically notes that previous research has found «scarce and weak» evidence of a relationship between tests of pedagogical knowledge and student achievement.

Although the findings are weaker on this count, the best evidence indicates that the impact of collective bargaining is especially negative for schools that are «relatively» high minority within a given (larger) district....

There is limited and weak evidence to suggest that it may have a role to play in reducing anxiety in dogs over the medium to longer term but the available evidence is of low quality and / or high risk of bias, with confounding variables providing alternative explanations for the findings.

However, a recent meta - analysis of published studies on neutering females and MC found that the evidence linking neutering to a reduced risk of MC is weak [13].

However, a recent systematic review of published work on neutering and mammary tumors found the evidence that neutering reduces the risk of mammary neoplasia to be weak, at best [13].

Of course Mass may feel that a linear regression of average Texas summer temperatures since 1895 provides conclusive evidence for his case that AGW is currently far too weak to play a significant role in the Texas 2011 heatwave (an argument he recycles in his Aug 9 blog post), but it is strange Mass picks on Rupp et al 2012 without mentioning Massey et al 2012 in the same collection of papers that similarly finds AGW impacts in excess of Mass's method (3 times in excess by my calculation).

This analytical report explores the livelihood and food security benefits of agroforestry and conservation agriculture in Malawi and Zambia, as well as economic feasibility analyses of the practices.It finds that agroforestry has well - documented improvements in yields and profitability in both countries, while the evidence - base for the benefits of conservation agriculture is positive, but weaker.

While GEV shape parameter estimates are predominately negative, qualitatively showing weak evidence for the Fréchet form of the GEV distribution, field significant differences from the Gumbel distribution in the region are not found.

Having debated this issue with British Antarctic Survey scientists and found astonishingly that they had no evidence for the hypothesis that CO2 amplifies the orbital - induced warming once it has begun — they were left lamely saying that the data «is entirely consistent with» that hypothesis — I have to agree with Willis's characterisation of the very weak video above: it amplified rather than damped my doubts about that hypothesis.

Smith et al. (2001), using similar bivariate time - series models, find that the evidence for causality becomes weak when the effects of ENSO are taken into account.

The Samaroos were acquitted of all charges in a 2010 criminal trial where the trial judge found the Crown's case «weak» and supported by «unreliable» and «highly uncertain» evidence which contained «significant flaws» and «discrepancies».

In general, the patterns of association with achieving MVPA recommendations were similar to what was found for MVPA as a continuous measure, including point estimates suggesting weaker or inverse effects in girls but no evidence of gender interaction (Table 3).