Sentences with phrase «by random assignment»

By random assignment within each dyad, one spouse was designated to be the support seeker and the other spouse to be the support provider.

As is the case for the imbalance in the decline - to - participate rates across families assigned to the control and treatment groups, the inclusion in the treatment group of children not randomly assigned to treatment nullifies the assumption justified by random assignment of equivalence of the treatment and control children at the outset of the study.

By random assignment, about half of the infants received an IOL and the other half received contact lenses.

Not exact matches

Quote: «Generation of the group assignments was conducted using a blocked randomisation method with a block size of four by a random allocation software program»

After participants had given informed consent, the group was determined using opaque, sealed envelopes containing assignments generated by random table number.

The paper is one of a series of studies by Doyle and his colleagues which use the random assignment of patients to hospitals, due to ambulance - dispatch practices, in order to evaluate hospital effectiveness.

By contrast, when comparing two schools without use of random assignment, it can be very difficult, if not impossible, to ensure that the students being evaluated are otherwise similar.

By taking data from Boston schools with admissions lotteries, the scholars have used the random assignment of students to schools to see how similar groups of students fare in different classroom settings.

Since I expect that there will be more demand for these free tickets than supply, the school groups will be awarded the tickets by lottery — allowing for a rigorous random - assignment analysis that compares outcomes for students whose groups won the tickets by lottery to those who did not.

The random assignment study of field trips was made possible by the fact that the Crystal Bridges Museum of American Art opened in Northwest Arkansas, an area that had never before had a major art museum.

A random - assignment evaluation of career academies, conducted by MDRC, addresses this question of selection bias.

Expanding school choice has been shown to improve achievement for minority students by about one - third of a standard deviation after a few years of intervention, according to seven of eight random - assignment evaluations (the eighth showed positive but statistically insignificant effects).

The random assignment of students to classrooms, however, meant that pairs of children with the same birthday fell into different positions in their classroom age distribution by the luck of the draw.

A recent proposal for reauthorization approved by the IES advisory board, the National Board for Education Sciences, tweaks the language back again to reemphasize that causal claims can be made «only in well - designed and implemented random assignment experiments, when feasible.»

In the health sciences, random assignment is common because it is institutionally supported by funding agencies and publishing outlets and is culturally supported through graduate training programs and the broadly accepted practice of clinical trials.

In the international arena, Tucker may want to familiarize himself with the excellent work being done by Michael Kremer and Karthik Muralidharan utilizing random assignment around the globe.

The Commission, chaired by Dr. Paul Hill of the University of Washington, carefully reviewed the research on the impact of school choice on student achievement and included in its report the following statement: «The most rigorous school choice evaluations that used random assignment... found that academic gains from vouchers were largely limited to the African - American students in their studies.»

This is best achieved through random assignment to treatment conditions, which assures (within the margin of error associated with the sample size) that differences between groups of subjects other than their experience of treatment are evened out by the laws of chance.

One random - assignment evaluation found that sending parents that single postcard reminder about the importance of attending school increased attendance by 2.4 percent.

The researchers responsible for the evaluation responded to this threat to their random assignment design by creating a treatment and control group through statistically matching subjects whose parents had given permission for follow - up testing.

Another hypothesis consistent with both the tracking results and the effects from random peer assignment is that tracking by initial achievement improves student learning because it allows teachers to focus instruction.

This report, a Public / Private Ventures project distributed by MDRC, summarizes findings from a four - year random assignment study of an out - of - school - time program for middle - schoolers.

This brief, distributed by MDRC, summarizes findings from the four - year random assignment study, which involved 952 youth.

The full - scale random assignment study of the impacts on middle school students produced by PowerTeaching i3 will include 53 middle schools across five districts.

In our book, we point out that the research methods, most valued by American researchers, which involve the random assignment of research subjects to «treatments,» can not be used when researching entire national education systems, because it is not possible to randomly assign national populations to the national education systems of other countries.

While traditional research methods are based on comparing the effects of public and private schools on a student's test scores, EdChoice was able to compile random - assignment research which ensures that the results were not misconstrued by factors such as demographics or parental motivation.

This evidence from Tulsa is backed up by similar evidence from Boston's universal pre-K programs, and from random assignment experiments in both Utah and Rhode Island.

A rigorous 2011 random - assignment study by researchers from the University of Wisconsin — Madison examined the effects of a district - level intervention to support data - driven decision making in more than 500 schools in 59 school districts across seven states.

(The Ohio study was not random - assignment and its comparison group may have been severely compromised by the study's design.)

A team led by Johns Hopkins University, using a random - assignment research design, will assess the impact of the three - state effort on principals, teachers and students.

In 2010, an evaluation of the D.C. Opportunity Scholarship Program — based upon a random assignment analysis, i.e. «the gold standard» — found that vouchers in D.C. «raised students» probability of completing high school by 12 percentage points overall.»

Of these studies, the one by Nye, Konstantopoulos, and Hedges is the most compelling because it involved random assignment of students to classes controlled for factors such as the previous achievement of students, socioeconomic status, ethnicity, gender, class size, and whether or not an aide was present in class.

Save more by purchasing in advance online or by choosing a free random seat assignment at check - in.

By closing them out you don't have to worry about random assignment or any after - hours price action in the underlying stock that may occur.

[74] Publicly accessible records of this Court demonstrate that the failure to implement and adhere to an objective protocol for the random assignment of judges has resulted in significant discrepancies in both the number of sentencing panels on which some judges of the Court sit and a marked difference in the number of sentence appeals heard by certain justices of the Court as compared with their colleagues.

Since your insurer assignment is random and the available optional coverage varies by company, your insurance agent can explain what optional coverages are available, and at what limits.

Although physiological reactivity in humans can be altered in the short term by psychosocial interventions (34, 35), including in children exposed to maternal deprivation (36, 37), we are unaware of experimental research examining whether random assignment to a caregiving environment alters patterns of physiological reactivity later in development.

7 In a departure from random assignment, two communities assigned to the PROSPER group withdrew from the study during its first year and were replaced by two other communities that year — a substitution that could potentially have undermined the equivalence of the PROSPER and control communities and led to inaccurate findings.

The multi-year, random assignment study is funded by the U.S. Department of Health and Human Services, Administration for Children and Families.

Four studies were excluded because assignment to treatment was not random, 16 — 19 one because it was an interim analysis of an ongoing study, 20 and 11 because they involved children with depressive symptoms and not depressive disorder.21 — 31 This left six randomised trials of cognitive behaviour therapy for depressive disorder in young people.32 — 37 Two of the trials were conducted by the same research group 32 34 but it was clear from the trial descriptions that they were based on different samples.

The study uses a random assignment design, and is conducted by MDRC in partnership with James Bell Associates, Johns Hopkins University, and Mathematica Policy Research.

Assignment to group was randomized by school rather than by individual; thus, data was analyzed using a three - level mixed random regression model procedure, with time points nested within individual participants nested within schools.

MIHOPE, which stands for Mother and Infant Home Visiting Program Evaluation, is a large - scale random assignment evaluation of home visiting programs funded by MIECHV.

The objective of our study was to evaluate the real - world effectiveness of ROE in preventing violence (reducing aggression and increasing pro-social behaviour) in children and youth at the individual level, immediately after program completion and up to three years afterwards, in two successive samples determined via cluster random assignment, in order to provide rigorous evidence to inform provincial government decision - making regarding the future expansion of ROE in Manitoba, including questions related to relative effectiveness by student gender and grade level.