Sentences with phrase «size of the effect»

Given the small size of the effects for each individual student, even a slight bit of selection bias could dramatically alter the estimated benefits of an individual teacher.

The larger - than - expected size of the effects of this modest tax increase may be because the tax change occurred at the same time as the Great Recession — a time when unemployment was high and personal incomes lower, according to the study.

But while preliminary findings from the first 32 cases involved in the study confirm causality, the researchers said, the true size of the effect will become clear only after full analysis of all 200 cases and 400 controls.

Although we found significant indirect effects for the mediating role of social problems through avoidance motivation and directly from self - esteem, the effect size of the effect through avoidance motivation was negligibly small.

Statistical power is affected chiefly by the size of the effect and the size of the sample used to detect it.

I still have reservations, however, about the size of the effect and whether or not we are focused on the right outcomes.

The size of this effect may be illustrated by comparing the mean test scores of those who were breastfed for ≥ 8 months with those who were not breastfed.

Further adjustment for parity did not alter the direction or size of the effect.

Once again, autistic children received more structural variants from their fathers but not mothers — though the size of the effect wasn't quite as large in this second sample.

Our results don't really allow us to accurately predict the size of the effect — they're more about providing evidence that the relationship is actually causal, rather than the result of confounding or common risk factors.»

«We're hoping to expand this approach to additional courses, and different types of courses, to determine the size of this effect and whether it varies across disciplines,» MacNell says.

«What surprised us was the size of the effect,» says Blackwell.

Of those six principles, the most pertinent for people in general (and science journalists in particular) is No. 5: «A p - value, or statistical significance, does not measure the size of an effect or the importance of a result.»

The size of the effect was correlated with participants» ratings of their own ego dissolution, suggesting that this network underlies a stable sense of self.

The size of this effect is on par with the impact of party identification on attitudes toward gays and Muslims.»

And the size of the effect depends on which instrument they play.

A p - value, or statistical significance, does not measure the size of an effect or the importance of a result.

«I was surprised to see the size of the effect,» Patel says now.

However, since these data are from observational studies, it is impossible to be certain of the size of the effect of surgery without randomised controlled trials comparing surgical with non-surgical care.

In meta - analyses such as this one, «heterogeneity» in results corresponds to variations in the size of an effect across the studies being reviewed.

Statistical modeling of the results revealed that, on average, patients experienced significantly reduced scores for the active treatment, though the size of the effect in individual patients varied.

Further adjustment for parity did not alter the direction or size of the effect.

It's also the first study to show the size of the effect of positive pressure mask treatment (CPAP) in patients with obstructive sleep apnea (OSAS) on their nocturia symptoms.»

«I really can not overstate the size of this effect.

«We all know that eating fruit and vegetables is healthy, but the size of the effect is staggering,» says Dr Oyinlola Oyebode of UCL's Department of Epidemiology & Public Health, lead author of the study.

«I'll be honest,» Costello says, «I was really surprised» by the size of the effect.

But the proliferation of P values (which is happening in many fields) concerns statisticians, because the value by itself doesn't say anything about the size of the effect or its biological significance.

They conducted numerous tests to determine the validity of the satisfaction - stock relationship and to estimate the size of its effect.

«We were surprised by the size of the effect,» said Michael Jerrett, Ph.D., professor in the School of Public Health at the University of California, Berkeley and lead author on the study.

«Our evidence shows that it could be applied to other products successfully, though I expect the size of the effect to be smaller than what we found in our study.

The size of the effect depends on how easily the particular strain of the flu is transmitted, however.

And she goes on to say that even though the size of the effect seems relatively small, the ubiquitous nature of ambient air pollution exposure suggests that exposure to it might have considerable impact on stillbirth risk at the population level.

The sizes of the effects of some of the genetic variants associated with testicular cancer risk are quite high — compared with breast and prostate cancer, for example, where most variants each have only a very small effect.

With the cosmic ray model, the size of this effect rises to ~ 0.4 C.

The thing that was surprising to the scientists was the size of the effect — children differ in how fat they are, but measurement of the epigenetic change at birth made it possible for the scientists to predict 25 % of this variation.

The sizes of these effects suggest that the compounds largely restored muscle mass and strength to young adult levels.

In fact, the apparent impact on science performance was two - thirds the size of the effect on math performance.

The Duke researchers found that being taught by a sub for 10 days a year has a larger effect on a child's math score than if he'd changed schools, and about half the size of the effect of poverty.

The size of these effects may seem small, but recall that they reflect the impact of a higher - VA teacher for a single year and could compound over time to the extent that students are exposed to multiple high - VA teachers.

To put the size of this effect in context, the overall share of students who received any exclusionary discipline consequences during the study period was 7 percent.