As a doctoral student, Nathan worked on a number of projects, including several state - commissioned
validity studies with his advisor, Dr. Derek Briggs, examining approaches to quantifying academic growth.
Professional Standards and the Link Social
Validity Study with Sophia Hubbell & Eileen McKeating
Not exact matches
His method for
studying the
validity of elections is to compare exit poll results
with official election outcomes.
In fact, the authors do not discuss the reliability or
validity of any
study included in the review (Wax et al, 2010), or why any particular
study was excluded and this is potentially the primary issue
with the Wax
study.
There have been some isues
with the
validity of these
studies however we always prefer to use a cooking method other than microwaving.
Although in this
study information on breastfeeding practice was reliant upon maternal recall at 9 months, breastfeeding figures are in agreement
with data collected prospectively in the UK Infant Feeding Survey conducted in 2000.32 Likewise, the
validity of maternal recall of the circumstances of pregnancy and delivery has been shown to be accurate.33 We were unable to adjust for maternal intention to breastfeed at antenatal booking, a factor shown to be important in previous studies34 as this information was not collected in the survey.
However, because only a few
studies were graded to be of high quality, we suggest that further research, conducted
with good methodology and large sample sizes, should be carried out to strengthen the
validity of these observations.
As the
study of cannibalism gained scientific
validity in the 1980s, more and more researchers began looking at the phenomenon, bringing
with them expertise in a variety of fields.
The authors say: «It is possible that either AET, RT or CT may be easier to perform effectively without supervision, thus affecting the external
validity of these results since only
studies with supervised training were included.»
«Our
study shows the
validity of two scales for assessing how cognitive impairments are associated
with many substance disorders including alcohol, cannabis, cocaine and one's ability to function well in important interpersonal or occupational areas,» said Efrat Aharonovich, PhD, Department of Psychiatry, Columbia University Medical Center, and first author.
«Due to the complexity of the
studied phenomena, one should not arbitrarily extend the
validity of the presented results by assuming that a tsunami
with a magnitude at generation five times larger, for example, would result in an inundation area five times larger,» cautions Samaras.
In addition, for this
study, they created an autistic behavior section, using the following criteria: 1) whether reliability and
validity data were available in typically developing individuals and / or in those
with neurodevelopmental disorders; 2) whether the measure had been piloted in FXS clinical trials; and 3) whether the measure addressed an important aspect of the FXS symptom.
Researchers also tested the
validity of conscious experiences using objective markers for the first time in a large
study to determine whether claims of awareness compatible
with out - of - body experiences correspond
with real or hallucinatory events.
A team of psychologists and imaging scientists at Vanderbilt has collaborated on a
study that provides important corroboration of the
validity of these
studies by examining the relationship of the fMRI maps of resting state brain's networks
with the brain's underlying anatomical and neurological structure.
But scientists not affiliated
with the research express doubts about the
study's
validity and point to earlier trials that produced the opposite result.
Several recent meta analyses have suggested that dietary supplementation
with EPA and DHA does not provide additive cardiovascular protection beyond standard care, but the heterogeneity of included
studies may reduce the
validity of their conclusions.
Other persistent problems
with the
validity of
studies of caffeine and miscarriage include confounding by smoking and potential recall bias.
He outlines many other supplements but does not recommend them due to lack of research or
studies which were done
with an obvious bias which should be discounted of all
validity.
Given the concerns raised by the Klein
study regarding the
validity of the TAAS exams in Texas, I decided to use the same analytical technique as Klein: comparing results on the FCAT
with results on low - stakes standardized tests given at around the same time and in the same grade.
The lessons progress through a range of tasks that engage student's interest, encourage them to: -: interact and share what they know -: develop their abilities to extract information from text and graphics -: view information critically -: check the credibility and
validity of information -: develop online research skills -: use web based tools to create surveys and data visualisations The lessons cover a range of topics including: -: Advertising and how it influences us -: Body language and how to understand it -: Introverts and extroverts and how they differ -: Emotional intelligence and how it impacts on our relationships -: Facts about hair -: Happiness and what effects it -: Developing
study skills -: The environment and waste caused by clothes manufacturing -: Daily habits of the world's wealthiest people -: The history of marriage and weddings Each lesson includes: -: A step by step teachers guide
with advice and answer key -: Worksheets to print for students
[17] This is a big problem for internal
validity because we are left
with the result that parents who refused participation in the Abecedarian program were less willing or able to commit to a long - term early childhood intervention for their children than the overall population of families who were recruited into the
study.
Finally, the authors» analysis equates the
validity of adequacy
studies with a universal, one - size - fits - all answer to education funding.
A recent report by the NAEP
Validity Studies Panel, an independent panel run by the American Institutes for Research, found that NAEP is reasonably, though not entirely, aligned
with the common core.
This
study provides the strongest evidence available on the greater return on investment of targeted preschool interventions in contrast to universal programs in which money is spent on all children,
with the limitations on external
validity I've described.
These
studies also are weak
with regards to external
validity because the research design does not permit a determination of whether the pre-k program improves performance in elementary school — the control group begins to receive the pre-k program just after the children are initially tested, which means there is no untreated control group
with which to benchmark performance in kindergarten and thereafter.
With that background, I'll take you quickly through my ratings of the internal and external
validity of the
studies that have been most frequently cited in the debate on the Obama administration's proposal for Preschool for All and related efforts.
There are serious issues
with the internal
validity of these
studies as well.
And even if one were to accept RAND's claim to
validity by virtue of its match
with the results of another
study, this claim applies only to the class - size findings.
In contrast, the only two
studies in the list
with both high internal and external
validity (Head Start Impact and Tennessee) find null or negative impacts, and all of the
studies that point to very small, null, or negative effects have high external
validity.
Accordingly, even though their data for this part of this
study come from one district, their findings are similar to others evidenced in the «Widget Effect» report; hence, there are still likely educational measurement (and
validity) issues on both ends (i.e.,
with using such observational rubrics as part of America's reformed teacher evaluation systems and using survey methods to put into check these systems, overall).
The report deals
with this problem by citing two
studies that it claims buttress the
validity of its own results.
The
study of 600 teachers, conducted by Abacus Associates for the Connecticut Education Association, underscores mounting concerns by legislators, educators, parents, and others about the test's
validity, fairness, and negative impact on students — particularly those in high - poverty districts and those
with limited access to computers.
While positive effects were reported in all
studies in this set, the majority of these
studies reported using instruments that were developed for that
study with little information about reliability and
validity of those measures, or about the instruments employed.
The researchers acknowledge three specific limitations in this
study: challenges
with validity and external reliability of the authentic instruction rating scale, missing data due to fluctuations in teacher participation during the duration of the
study, and the inability to account for a variety of variables that may impact
study outcomes due to the limited time frame and scope of the program in which the
study took place
Along
with the results of Hill's
validity study, state education officials created this interactive map showing «how many students in each school district experienced computer interruptions during ISTEP testing in Spring 2013.»
Dr. Gandhi also serves as project director for a
study funded by the Institute of Education Sciences that examines the
validity of accommodations on large - scale reading assessments for students
with disabilities.
Likewise, having great familiarity
with the authors of not only the three
studies cited in this brief, but also the others cited «in support,» let's just say their aforementioned sheer lack of attention to bias and what bias meant for the
validity of their findings was (unfortunately) predictable.
Students» high school state assessment scores have also been correlated
with students» GPA in their first college - level courses in a predictive
validity study.
What little we do know about SLOs at this point, however, is two-fold: (1) «no
studies have looked at SLO reliability» and (2) «[l] ittle is known about whether SLOs can yield ratings that correlate
with other measures of teacher performance» (i.e., one indicator of
validity).
A
study with high external
validity allows us to generalize the results to other students in other programs.
A
study with high internal
validity boosts our confidence that effects we observe are attributable to the program itself and not to other extraneous factors — that is, we are confident that the program caused the outcome we observed.
Competitive effects
studies may have high external
validity, but they have lower internal
validity than RCTs, meaning we don't have as much confidence as we would
with RCTs that there is a causal relationship between school choice programs and test score gains by students who remain in public schools.
This summer, the Veterinary Information Network did a small
study to test the
validity of DNA tests
with dogs of known (and unknown) heritage.
Whilst the BT method is cost effective and has been widely used in academic
studies and to inform policies, the method is associated
with various limitations which affect the
validity and reliability of the results produced.
Worse yet, the falsified raw data in the records is not even being acknowledged, much less discussed, in any meaningful way
with respect to the
validity of the IPCC reports and the
studies used to prepare those reports.
In her discussion of the LGM temperatures in the Methods section (
Validity testing the GAST reconstruction using particular points in time) only
studies are considered that agree more
with her reconstruction.
Astonishingly, however, the same
study shows that in times of crisis the number of visas
with limited territorial
validity issued for humanitarian reasons decreases dramatically.
Following is a letter from Laura Gilbert, Ph.D. to Assessment.com
with the results of a
validity study between the MAPP career test and the Strong Interest Inventory.
The first
validity study,, conducted
with 30 subjects in 1997, yielded correlations that suggest similarity between the MAPP and the Strong Interest Inventory.
The DPICS - R has demonstrated good internal reliability between CII and behavior codes, as well as concurrent
validity with external criteria in previous IY
studies.21