Sentences with phrase «null results in»

Similar studies of teacher merit pay have shown null results in New York City and Chicago.

Fourthly, as with all observational studies, residual confounding by other factors can not be totally excluded; however, the consistently observed null results in both men and women argued against missing strong associations.

One of the latest null results in the search for WIMPs came from the Large Underground Xenon (LUX) experiment, a third of a ton of liquid xenon held at a frosty — 100 degrees Celsius inside a giant water - filled tank buried one and a half kilometers beneath the Black Hills of South Dakota.

We are therefore confident that the null result in experiment 2 was not due to lack of power.

You proposed to explain Parker's null result in seeking a trend in calm - day vs. windy - day signals by assuming a windy - day mixing of non-local (Suburban) air with the local (Airport) air.

Not exact matches

Crucial points, if we mess up in a game like this it'll make that che result null and void.

None of these sensitivity analyses resulted in confidence intervals that included the null hypothesis or 1.0.

In all five studies, null results were reported, and a mean difference in systolic blood pressure of 0.0 mmHg between breast - and bottle - fed subjects was assigneIn all five studies, null results were reported, and a mean difference in systolic blood pressure of 0.0 mmHg between breast - and bottle - fed subjects was assignein systolic blood pressure of 0.0 mmHg between breast - and bottle - fed subjects was assigned.

The highest court of Kenya said the elections said the 8 August election had not been «conducted in accordance with the Constitution» and that results, as declared by the electoral commission, were «invalid, null and void».

I have advocated before that one way to mitigate problems with null - hypothesis significance testing is for editors of scientific journals to employ «results blind» decision making in determining whether to publish and make it be known that they are doing so.

«Outcomes that are novel, or eye - catching are generally seen as more attractive and competitive than those that are null or ambiguous,» putting researchers under much career pressure to produce attractive results, says Chris Chambers, a cognitive neuroscientist at Cardiff University in the United Kingdom who became one of the founders of the Registered Reports concept a couple of years ago, in the Royal Society's announcement.

Several scientific journals now specialize in publishing failed experiments, including the Journal of Negative Results in Biomedicine and the Journal of Articles in Support of the Null Hypothesis.

In what's been called the most famous failed experiment ever, their null result suggested that there was something slightly wrong with the theory.

«Null results are usually not very interesting, but in this case, it is.»

These results suggest that the additional muscle mass induced by follistatin in Mstn null mice results from inhibition of additional ligands that act predominantly to regulate muscle fiber growth.

In order to determine whether this effect of follistatin results solely from inhibition of myostatin activity, I analyzed the effect of this transgene in myostatin - null micIn order to determine whether this effect of follistatin results solely from inhibition of myostatin activity, I analyzed the effect of this transgene in myostatin - null micin myostatin - null mice.

We have considered the possibility that radiation could directly result in more apoptosis in the thymus of p21 - null mice; however, quantitation of sub -(G0 / G1) thymocytes after acute irradiation (10 Gy; and analysis 3 h after irradiation) has not supported this idea (data not shown).

In turn, tumour experiments in pericyte Tie2 null mice resulted in a sustained pro-angiogenic tumour vessel phenotype with strongly enhanced tumour growtIn turn, tumour experiments in pericyte Tie2 null mice resulted in a sustained pro-angiogenic tumour vessel phenotype with strongly enhanced tumour growtin pericyte Tie2 null mice resulted in a sustained pro-angiogenic tumour vessel phenotype with strongly enhanced tumour growtin a sustained pro-angiogenic tumour vessel phenotype with strongly enhanced tumour growth.

Drever has carried out experiments in a number of areas of physics, including spectroscopic measurements to look for anisotropy of mass and space - his null results providing accurate confirmations of both special and general relativity.

Short guide RNA was targeted to the sequence corresponding to the CCHa2 peptide - coding region, resulting in the isolation of putative null alleles for CCHa2 (CCHa2CR - 1, CCHa2CR - 2, and CCHa2CR - 3)(Figs 5A and S5).

Benjamin Solomon, MBBS, PhD, of Peter MacCallum Cancer Centre in Melbourne, said the null results of this study are quite clear, but there remains no obvious way to choose which patients should receive cetuximab.

Results: We demonstrate that Ad - B2 (− / −) mice display early onset lipodystrophy, in common with congenital Bscl2 null mice and CGL2 patients.

The results were similar for most outcomes across categories of smoking status, with the exception of death from heart disease, with associations that appeared to be null in current smokers (P = 0.002 for interaction in men and P = 0.05 for interaction in women).

The mechanism of this association is unclear and could reflect chance or residual confounding, although similar results were reported in the Nurses» Health Study and the Kaiser Permanente Multiphasic Health Checkup cohorts.19, 20 In contrast to other outcomes, a modest borderline positive association was observed in men for coffee consumption and mortality from cancer, with a null association observed in womein the Nurses» Health Study and the Kaiser Permanente Multiphasic Health Checkup cohorts.19, 20 In contrast to other outcomes, a modest borderline positive association was observed in men for coffee consumption and mortality from cancer, with a null association observed in womeIn contrast to other outcomes, a modest borderline positive association was observed in men for coffee consumption and mortality from cancer, with a null association observed in womein men for coffee consumption and mortality from cancer, with a null association observed in womein women.

However, it's possible that frequent continual usage will result in the body adapting to Tribulus - or any exogenous supplement, resulting in its effect decreasing, perhaps to the null point.

Moreover, although many have lamented the shortage of interventions with positive results in the What Works Clearinghouse, even null results represent progress.

The null distribution looks an awful lot like our actual results: it is almost flat in the middle and flares at the ends (see Figure 2).

One study in North Carolina finds null results overall and some negative results for student subgroups for a similar approach implemented as part of that state's Race to the Top program.

In another blog post, AU does point to the one gold standard study that found a null result, a reexamination of the Peterson / Howell study of New York's private scholarship program.

This supports the use of these stimuli and highlights that the null result found in this experiment is unlikely to be due to failures in producing authentic DDS or ADS when the content is reversed.

Together the effect sizes and power analysis indicate that experiment 2 had sufficient power to find differences similar to those found in experiment 1, had they existed, and therefore, we can be relatively confident in this null result.

To test for heterozygote deficiency, as might result from the presence of null (nonamplifying) alleles or inadvertent pooling of subpopulations (Wahlund 1928), we tested 1 - tailed probabilities of departure from Hardy - Weinberg equilibrium, using the Markov chain exact test in GENEPOP.

That is, when the test is designed to result in 5 % false rejections of the null hypothesis, it may result in a few more.

He claims that this can be corrected for, but he still isn't using the proper null — in M&N they show the results from the ensemble means (of the GISS model and the full AR4 model set), but seem to be completely ignorant of the fact that ensemble mean results remove the spatial variations associated with internal variability which should be the exact thing you would use!

Fahy illustrates one by citing a recent piece by Dan Vergano of USA Today in which Vergano explores the «file - drawer effect» — what appears to be a growing tendency of researchers to avoid publishing negative or null results.

So a reasonable null hypothesis is that reducing the spatial area in which such clouds reside will result in a near zero feedback, with the residual probably quite model and cloud property dependent.

It also fails to prove that any such correlation is not simply the result of a naturally warming environment, and in fact this would be the null hypothesis and MY interpretation of it.

The real drivers of the climate system that result in the natural variability patterns, have no funds in the grant pipeline, the null hypothesis has yet to be dis - proven.

Then we have a plurality of variable null hypotheses: «a wide null hypotheses may be modified», «split the null hypothesis into a large set of alternative hypotheses», «using one fixed null hypothesis for every step gives in this case totally wrong results».

That is the null hypothesis is that the currently observed rises in global temperature is the result of green house gases exclusively.

While scientists do not explicitly discuss very often the concept of null hypothesis, it's implied in every analysis that results in a confidence interval.

it is important to recognize that an inherent difficulty of testing null hypotheses is that one can not confirm (statistically) the hypothesis of no effect.While robustness checks (reported in the appendix), as well as p values that never approach standard levels of statistical significance, provide some confidence that the results do not depend on model specification or overly strict requirements for statistical significance, one can not entirely dismiss the possibility of a Type II error.

We live in an insane age that punishes null results — all scientific research is currently geared towards three year renewable grant cycles so the entire concept of longer term research projects or goals is vanishing from science.

IPCC has failed to refute the null hypothesis that currently observed changes in global climate indices and the physical environment are the result of natural variability.

It simply ignores the alternative and null hypothesis, amply supported by empirical research, that currently observed changes in global climate indices and the physical environment are the result of natural variability.

It is possible that this null result is partly due to the method of analysis, but it is also attributable to the timing of the annual peak streamflow discharge, which in the United States is usually in late winter or early spring.

Thus, by using local trends, you are pulling for the null result you got, because the places that had hot outliers would have higher trends, so the hot outliers would appear smaller in your metric?

Some people (no link, sorry) have noted that the only experiments getting actual null results were done in vacuum or solid material (fiber)-- most experiments in air (or other gases) got some shift that correlated with interferometer position w.r.t. the celestial sphere, not the Earth coordinates, so that has kept speculation alive.

Anyway we seemed to have concluded that Michelson and Morley measured a null result to first order in v / c and it therefore follows that «climate skeptic» arguments are imbecilic (or something to that effect).

But both the source code and the hard - wired «hockey stick» figures clearly confirm what physicist David Ritson pointed out more than four years ago, namely that McIntyre and McKitrick's «compelling» result was in fact based on a highly questionable procedure that generated null proxies with very high auto - correlation and persistence.