Sentences with phrase «problems of previous studies»

One of the problems of previous studies was to exclude the possibility that animals chose a novel stimuli simply out of curiosity rather than by the exclusion of known negative stimuli.

Not exact matches

In this case, the British Medical Journal study is a so - called meta - analysis of seven previous studies, found that those who eat a lot of chocolate have significantly fewer heart and cardiovascular problems than those who do not.

In a recent «Focus Group Study» of celiac's who were not eating oats either because of fear or had previous reactions to other gluten free oats, 95 % had no problem with PrOatina oatmeal and have added PrOatina Oat products to their diets.

A study from 2010 acknowledged, yes, «in the short - term, kids go through a one - to two - year crisis period when their parents divorce,» but the idea of staying together for the kids is problematic, especially if it's a high - conflict family, and that previous research indicating people should stay together «has been plagued by many data problems — reliance on small samples derived from one therapy clinic, retrospective reports, and cross sectional data.»

We will examine risks in previous studies and describe the physiological mechanisms that explain why these birth interventions increase the risk of both breastfeeding problems and perinatal depression.

Previous research has tied smoking cigarettes during pregnancy to behavior problems among children later on, but those studies couldn't rule out the influence of other factors, such as genetics or parenting techniques, researchers said.

«Previous studies have shown reductions in children's social, emotional and behavioral problems,» said Ron Prinz, Ph.D., at the University of South Carolina, the study's lead investigator.

But the previous studies shared a common problem, says Marc Baum, a chemist at the Oak Crest Institute of Science, a nonprofit research center in Baldwin Park, California: They tracked car exhaust drifting out of highway tunnels, and the researchers were concerned that ammonia could react with the walls of the tunnel or other gases and thus not show up on detectors.

The Federal Aviation Administration established the center in 2004 under a Congressional directive to study air quality problems in airline cabins in the wake of the previous year's severe acute respiratory syndrome (SARS) outbreak in Asia, which later spread to more than two dozen countries in North America, South America and Europe.

The main problem is that it is extremely difficult to measure electrical activity deep inside the brain of a living person, and differences between the brains of living people and those of the animals and cadavers that previous studies have used are significant.

The problem with the previous study, says Barausse, is that it did not include so - called «self - force» effects that stem from the gravity of incoming matter.

Professor Philip Eaton, Professor of Cardiovascular Biochemistry at King's College London, said: «The findings of our study help to explain why previous research has shown that a Mediterranean diet supplemented with extra-virgin olive oil or nuts can reduce the incidence of cardiovascular problems like stroke, heart failure and heart attacks.»

Previous studies by Holtzman, co-first author Yo - El Ju, MD, an assistant professor of neurology, and others have shown that poor sleep increases the risk of cognitive problems.

Previous studies have shown that the problem is even worse elsewhere in the world, with an 11.4 percent global rate of antibiotic - resistant Enterobacteriaceae infections among young people, including 27 percent in Asia and the Pacific, 8.8 percent in Latin America, and 2.5 percent in Europe.

These genes are believed to be essential for the normal function of nerve cells, and previous studies have linked these mutations to problems with synaptic function — how neurons communicate with each other.

Bearing in mind previous research, the main objective of this study was to identify the factors relating to greater emotional and behavioural problems among children, in the context of foster care (behavioural problems, impulsivity and attention deficit).

«We hypothesized that long - term yogurt intake might reduce the risk of cardiovascular problems since some previous small studies had shown beneficial effects of fermented dairy products,» said one of the paper's authors, Justin Buendia.

«It's very clear that ICU survivors have physical, cognitive and psychological problems that greatly impair their reintegration into society, return to work and being able to take on previous roles in life,» says senior study author Dale Needham, M.D., professor of medicine at the Johns Hopkins University School of Medicine.

But while his previous study showed what kinds of problems materialism causes, this new study shows why they occur.

The results add to previous studies showing a high prevalence of PTSD and other mental health problems after this unique disaster.

Steven Grant, a researcher at the National Institute on Drug Abuse, says that the new findings will help untangle a «chicken and egg problem» with human addiction studies: Previous research found a correlation between the D2 - family receptors and drug abuse, but it was unclear whether fewer receptors contributed to addiction or if chronic drug use led to a drop in the number of receptors.

Previous studies have shown poor cardiovascular health can increase the risk of cognitive impairment such as problems in memory and learning.

Update: Six French scientific academies issued a statement on 19 October, saying the Séralini study could not reverse previous conclusions that this and other GM crops are safe, because of problems with the experimental design, statistical analysis and animals used, and inadequate data.

Scientists are planning an attempt to extract DNA from the «hobbit» Homo floresiensis, the 1 - meter - tall extinct distant relative of modern humans that was unearthed in Indonesia, following a study that suggests problems in standard sampling methods in ancient - DNA research could have thwarted previous efforts.

It supports previous studies that have shown increased levels of behavioral problems and / or disruptive disorders among young people with gender variance.

Psychologists also tackled problems of publication bias head - on, he said, referring to a tendency for studies that are new and flashy to get more space in the journals than replications of previous work; that's the case even though replications are what show that science is strong.

The association of maternal obesity during gestation and chronic conditions in children is beginning to be explored, 37,38 and previous studies alluded to an increased rate of health problems generally in caregivers of children with disabilities.39, 40 Associations between male sex and poverty and behavior / learning problems are congruent with other studies.41 - 43 The association of minority race / ethnicity with asthma and obesity and the inverse relationship of minority race / ethnicity with other physical conditions and behavior / learning problems are consistent with previous studies.12,43 - 45

The study tested a lower dose of the oral multi-targeted tyrosine kinase inhibitor sunitinib than in previous trials, where toxicity proved too much of a problem.

While previous research has focused on biomechanical differences as the main source of these problems, a new study suggests another distinction that could play a role: changes across the menstrual cycle in nerves that control muscle activity.

Previous studies have found a link between bullying and a higher risk of mental health problems during childhood, such as low self - esteem, poor school performance, depression and an increased risk for suicide.

Previous studies have examined the effect of TV or video games on attention problems, but not both.

Previous studies have found unusually high rates of mental - function problems in former NFL players (especially those with a history of concussions), while a large body of research has linked being overweight or obese to a higher risk of dementia later in life.

Compared to their peers of normal weight, the obese workers in the study were 66 % more likely to have missed between 10 and 24 days of work due to illness or other health problems in the previous year, and they were 55 % more likely to have missed 25 or more days.

Exposure to the pesticides, known as organophosphates, has been linked to behavioral and cognitive problems in children in the past, but previous studies have focused on communities of farm workers and other high - risk populations.

A problem with previous work in this area is the difficulty designing a double - blind study of dehydration (1).

A previous NIEHS study showed that newborn mice given genistein grew up to experience irregular menstrual cycles, erratic ovulation and other problems indicative of infertility.

The section on Alzheimer's is particularly compelling, and it points out the pitfalls in relying on previous studies done by the statin industry, where often those who have memory problems as side - effects of the statin drugs are excluded from the study, so that the results end up inappropriately biased in favor of statins.

«All of the problems with previous studies come from a very modest dose of vitamin D,» says Heaney, who wrote an editorial that accompanies the study.

In what's described as the broadest look at childhood obesity to date, a study shows that 40 percent of Arkansas students are overweight, suggesting that the problem may be worse nationally than previous estimates indicated.

Previous studies of virtual math teams have focused on the coconstruction of a joint problem space and the ways collaborative meaning making can be accomplished in the online environment.

In this study, we built on previous neuroimaging studies of mathematical cognition and examined whether the same cognitive processes are engaged by two strategies used in algebraic problem solving.

The 27th annual study asked some 33,560 owners of model year 2013 vehicles about problems they'd encountered in the previous 12 months.

The problem Stefan explains with the spuriously - normalized year - round urban heat island adjustment in the previous study is a crisp, iconic example of how statistical techniques can go astray if you lose track of the meanings behind the numbers.

Here's the problem with the Bayesian approach as we see it being used here: prior information is being used to incorporate results from previous studies for the purpose of demonstrating that later data — despite being a reduced sample size — effectively predicts global warming.

The present study extends previous findings, with incorporation of a randomized controlled study design and use of documented records of behavior rather than typical self - report data which are open to the problem of social desirability.

Student's life satisfaction is lack of empirical research, so we can only get a few theoretical data from previous studies and a lot of problems to be further empirical research.

These results are consistent with previous studies of children with cancer (Varni et al., 1994), JRA (Varni et al., 1988), limb deficiencies (Varni et al., 1989), and a mixed sample of children with chronic health problems (Wallander & Varni, 1989).

Previous research from the former waves of the Bergen Child Study (a longitudinal study nested within youth@hordaland) has also identified psychological problems as a predictor for non - participation.70 As the current sample may be skewed towards better socioeconomic status and psychological health, the results may be a conservative estimate of the number of adolescents growing up in poor families and their associated mental health probStudy (a longitudinal study nested within youth@hordaland) has also identified psychological problems as a predictor for non - participation.70 As the current sample may be skewed towards better socioeconomic status and psychological health, the results may be a conservative estimate of the number of adolescents growing up in poor families and their associated mental health probstudy nested within youth@hordaland) has also identified psychological problems as a predictor for non - participation.70 As the current sample may be skewed towards better socioeconomic status and psychological health, the results may be a conservative estimate of the number of adolescents growing up in poor families and their associated mental health problems.

When encountering problems, students from one - child family tend to use such a mature coping style, however they also more likely to use the retreat style which is less immature coping styles, which is not the same with the results of previous studies (Li & Xi, 2006).

Previous longitudinal studies of children with attention - deficit / hyperactivity disorder demonstrated a higher degree of persistence than what we found among children with behavior / learning problems.