Sentences with phrase «effect size differences»

As small effect size differences were found, further studies are needed to investigate the long - term impact of early unhealthy diet.

A total sample size of n = 140 (n = 70 per group) is powered to have an 80 % chance of detecting 0.36 effect size differences at p < 0.5.

A similar effect size difference on the SDQ would therefore be expected in the current study.

Not exact matches

«We want to see whether this difference in brain size has an effect on any of those developmental milestones,» Rogers said.

A paired - samples t - test demonstrated significant differences with small to medium effect sizes in the before and after scores for all three subscales.

More research into the effects of legal body checking, including specific attention to injury risk attributable to differences in size and physical maturity.

«We want to see whether this difference in brain size has an effect on any of those developmental milestones,» Dr. Rogers said.

«We now understand that this sex difference is not actually a «sex effect», but rather an effect of finger size,» says Daniel Goldreich of McMaster University in Toronto, Canada.

The difference in diet explained 0.5 percent of the variation in total brain volume, an effect that was half the size of that due to normal aging.

And the results of the P - curves suggested that about 95 percent of the recent studies and those from a decade earlier had a large enough effect size, or the size of the difference in the effect being studied.

The daughter colonies resembled the parents in size meaning that the size difference was heritable, giving her in effect two different morphs of snowflake yeast.

«We now understand that this sex difference is not actually a «sex effect», but rather an effect of finger size,» says Daniel Goldreich of McMaster University in Ontario, Canada.

This similarity in structure and history allowed us to look at effects of island size, without having to worry about other differences among islands.»

«People using a prosthetic hand perceive real weight differences just like everybody else, but the effect of the size - weight illusion is halved.

This may make a difference in the effect size and will be included in the discussion of the results of the replication.

Differences in brain size within a species, such as humans, are relatively small, making it difficult to tease out the effects of brain size and the effects of other factors.

The difference between age indifferent preference (model AP) and preference for younger females (model YF) in producing a menopausal effect was robust across population sizes and mutation rates.

Power analyses for group differences and treatment effects are presented for different sample sizes to guide preclinical and clinical study design.

Although the difference in patient mortality between male and female physicians was modest, an observed effect size of a 0.43 - percentage point difference or a relative risk reduction of 4 % in mortality is arguably a clinically meaningful difference.

Differences in weight gain seen for specific foods and beverages could relate to varying portion sizes, patterns of eating, effects on satiety, or displacement of other foods or beverages.

The difference in diet explained 0.5 % of the variation in total brain volume, an effect that was half the size of that due to normal aging.

To identify more precisely the independent effects of the multiple factors affecting teachers» choices, we use regression analysis to estimate the separate effects of salary differences and school characteristics on the probability that a teacher will leave a school district in a given year, holding constant a variety of other factors, including class size and the type of community (urban, suburban, or rural) in which the district is located.

Further bolstering support for this third theory, the largest effect sizes we uncover demonstrate perceived differences in instructional techniques that are associated with teacher / student demographic similarity.

• Duke researchers Charles Clotfelter, Helen Ladd, and Jacob Vigdor found that being taught by a sub for 10 days per year has a larger effect on a child's math scores than if he'd changed schools, and about half the size of the difference between students from well - to - do and poor families.

We went back to our data and analyzed the effect of these cohort size differences on test scores.

(In five countries — Australia, France, Hong Kong, Scotland, and the United States — our strategy led to inconclusive estimates that do not allow for any confident assertions about the effects of differences in class size.)

A 2004 NCREL meta - analysis of 116 effect sizes from 14 web - delivered K — 12 distance - education programs between 1999 and 2004 found «no significant difference in performance between students who participated in online programs and those who were taught in face - to - face classrooms... in almost every comparison, students in distance education programs performed as well as students in classroom - based programs.»

That it is not may reflect the fact that the experiment was designed to evaluate the effects of differences in class size, not the career - ladder program.

One full standard deviation (an effect size of 1.0) is roughly equal to the average difference in test score performance between a 4th grader and an 8th grader.

In doing so, we have controlled for possible effects of differences in educational inputs such as class sizes, availability of materials, and aggregate expenditure per student in the country.

-LSB-...] The work of John Hattie (above) suggests that feedback (with an effect size of 0.73) is well within «the zone of desired effects» i.e. it makes a significant difference to student learning.

The impacts are presented as effect sizes (which represent the differences between groups in standard deviation units) for eight measured outcomes across the domains of literacy, language, and math.

In short, we find little evidence that the negative effects of attending a middle school are attributable to differences in resources, cohort sizes, or educational practices.

The moderating effects of organizational characteristics are to be expected, since district size and school size almost always «make a difference,» no matter what the focus of the research is.180 Elementary schools are typically more sensitive than secondary schools to leadership influence, although previous leader - efficacy research has reported mostly non-significant effects.181 And the rapid turnover of principals has been widely decried as anathema to school improvement efforts.182 Now we have some evidence that the positive effects of leader efficacy are also moderated by school and district size (the larger the organization, the less sense of efficacy among principals).

Examining the effect of class size on classroom engagement and teacherepupil interaction: Differences in relation to pupil prior attainment and primary vs. secondary schools by Peter Blatchford, Paul Bassett, Penelope Brown

Researchers often summarize the impact of programs and practices in terms of an effect size that measures the difference between the treatment and control groups.

In a recent update of Marzano, Pickering, and Pollock's 2001 meta - analysis, McREL researchers found an effect size for feedback of 0.76, which translates roughly into a 28 percentile point difference in average achievement (Beesley & Apthorp, 2010; Dean, Pitler, Hubbell, & Stone, 2012).

There is a difference between homework in primary (d = 0.15) and secondary education (d = 0.64) where the effect size is a lot higher in secondary education.

The effect size of d = 0.4 looks at the effects of innovations in achievement in such a way where we can notice real - world and more powerful differences.

When calculating an effect size it is best to compare your results including and excluding outliers to see if it makes a difference.

The effect size of this difference is.81 and was computed by subtracting the mean of the comparison group from the mean of the experimental group and dividing by the standard deviation of the comparison group (Cohen 1977).

Without trying to calculate the effects (need the gear ratios and tyre / wheel size and manufacturer's info for speed v engine rpm) the difference could well be down to the changes in both rolling diameters.

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.

Regression analyses revealed significant differences with medium to large effect sizes among those with service dogs compared to those on the waitlist, including lower depression, higher quality of life, and higher social functioning.

There is no discernible difference between the works other than size and color — perhaps one might go better with this or that couch — and the brushwork is intentionally invisible, part of Shepherd's successful attempt at the effect of a CAD printout.

ii) The respective absorption bands for each trace gas will be exhausted long before the volumes of those gases in the atmosphere become big enough to make a measurable difference to the overall density of the atmosphere and the size of the greenhouse effect which is density dependent.

None of this requires fractions of a degree difference to make the point, nor does it matter about how I round numbers, include or exclude stations, and the signal is some 50 times the size of the proclaimed co2 greenhouse effect, and I've accounted for a blending of different stations.

Second, the difference in effect sizes in abstracts versus main body of articles was especially pronounced in journals with high impact factors.

I agree with you that the last decade really doesn't tell you that much about the long term trends, given the size of the error bars, but it does allow for some interesting analysis of the difference between individual temperature records during that period (e.g. ENSO responses of satellites vs. surface measurements, effects of different ways of treating arctic temperatures, etc.).

The size of the uncertainty is a fraction of the ERI - bucket difference (if 10 % of the metadata are wrong then we should see and effect that's about 10 % of the difference), not the whole amount and it is incorporated in the uncertainty analysis.