Articles tagged with Intelligence Quotient
A systematic review and meta-analysis found an inverse association between fluoride exposure and children's IQ scores. The findings suggest a dose-response relationship between fluoride levels and IQ across multiple countries, highlighting the need for comprehensive public health risk-benefit assessments of fluoride exposures.
A genetic mutation that causes Huntington's disease may also enhance early brain development and play a role in promoting human intelligence. Children with the HD mutation have bigger brains and higher IQ than children without the mutation.
A new study published in Pediatrics suggests that pediatric concussions do not impact intelligence or IQ levels. The research, which combined data from two cohort studies in Canada and the US, found no significant difference in IQ scores between children with concussion and those with orthopedic injuries.
Researchers found that both higher cognitive abilities and exploratory behavior are linked to longer life expectancy in wild gray mouse lemurs. Animals with better cognitive performance and physical condition tended to have longer lifespans.
A new study found evidence of a reverse 'Flynn effect' in the US, with declines in verbal reasoning, matrix reasoning, and letter/number series scores, but an increase in 3D rotation scores. The study suggests that changing values and motivation may be contributing factors.
Researchers at Boston College found air-pollution-related disease, death and IQ loss occur in every city and town in Massachusetts. The study estimated a cumulative impact on childhood cognitive development of almost 2 million Performance IQ points lost.
A new study led by the University of Washington strengthens evidence that air pollution can harm childhood behavioral problems and IQ. Researchers found prenatal and postnatal exposure to nitrogen dioxide and small-particle air pollution were associated with poorer child behavioral functioning and cognitive performance.
A new study calculates that more than 170 million Americans lost an average of nearly three IQ points due to childhood lead exposure from car exhaust between the 1940s and 1996. This translates to a potential shift of millions from below-average cognitive ability to intellectual disability.
A new study found that children who drank well water with lead have a 21% higher risk of delinquency and 38% increased risk of serious complaints. Researchers analyzed a 20-year dataset linking blood lead measurements to reported juvenile delinquency records after age 14.
A study found that UK adults' accuracy in estimating national statistics is influenced by their intelligence, religiousness, and political beliefs. Respondents were most accurate when estimating characteristics like vegetarianism and car ownership, but least accurate for minority groups like homosexuals.
A recent study published in Environmental Health Perspectives found that exposure to low levels of organophosphate esters can harm brain development in children, affecting IQ, attention, and memory. The chemicals, used as flame retardants and plasticizers in electronics and baby products, have been widely misassumed to be safe.
MSU researchers have discovered how the skin's immune cells organize themselves in the epidermis to provide proper protection. The discovery sheds light on the skin's defense system, which was previously misunderstood and thought to be random in its distribution.
Researchers found that selective serotonin reuptake inhibitors can reduce deterioration of intellectual abilities in individuals with a microdeletion of chromosome 22. The study suggests a potential neuroprotective effect and opens up new research possibilities.
Research comparing adults born very preterm or very low birth weight to those born full term found a significant difference in average IQ scores, with VP/VLBW individuals scoring approximately 12 points less than term-born adults.
Research at Uppsala University discovered an epigenetic mechanism linking bisphenol F (BPF) exposure during fetal development to lower IQ levels in children. The study found that higher BPF levels were associated with increased DNA methylation in the GRIN2B gene, which plays a key role in neurological development.
A new cognitive construct called 'decision acuity' was identified as a stable factor underlying diverse decision-making abilities in adolescents and young adults. Decision acuity was linked to factors such as fast learning, reward sensitivity, and low propensity for retaliation, and predicted performance in decision-making tasks.
A new test, expressive language sampling (ELS), has been validated as a reliable tool to measure communication development in youth with Down syndrome. The study found that ELS measures were generally valid and reliable across ages and IQ levels, demonstrating strong validity for vocabulary, syntax, and speech intelligibility variables.
A new study published in Diabetes Care found that children with Type 1 Diabetes have lower brain volumes and IQ scores compared to non-diabetic children. The research suggests that hyperglycemia may adversely affect brain development, starting from childhood.
A study found that frequent cannabis use by young people is associated with a decline in Intelligence Quotient (IQ) points over time. The decline was primarily related to reduction in verbal IQ scores, potentially affecting performance in school and future employment prospects.
Researchers found that adolescents raised in nurturing environments had significantly higher IQ scores compared to those without such care. This was particularly true for children who experienced early adversities, such as poverty and pre-term birth.
A new longitudinal study found that individuals with autism spectrum disorder (ASD) experience significant cognitive gains between ages 12 and 23, with IQ increasing by an average of 7.48 points. Early language regression and greater communication problems at age 12 were associated with greater IQ increases.
A recent study published in The Journal of Nutrition found that mothers' vitamin D levels during pregnancy were associated with their children's IQ scores. The study also identified significantly lower levels of vitamin D among Black pregnant women, emphasizing the need for targeted nutritional interventions to address health disparities.
A study led by UC Davis Health researchers found that diabetic ketoacidosis is associated with cognitive problems in children, including lower long-term memory and IQ. The study also showed that repeated episodes of DKA can lead to worsening cognitive deficits over time.
Researchers found that individuals born small for gestational age have a lower IQ throughout development, but differences can narrow by adulthood. Additional factors like socioeconomic status and parent-infant relationship also influence cognitive performance.
A study by Duke University scientists found that native communities hundreds of kilometers away from gold mining in the Peruvian Amazon have high levels of mercury exposure, leading to intellectual deficits and IQ losses. Children with higher mercury levels in their hair showed cognitive effects, even at lower exposure levels.
Girls with autism experience greater reduction and less rise in symptom severity than boys, according to a UC Davis MIND Institute study. Children's symptoms can change with age, and some may even lose their diagnosis entirely.
Researchers developed five language outcome measures using expressive language sampling (ELS) to assess treatment efficacy in individuals with fragile X syndrome and intellectual disabilities. The study found that ELS yielded valid and reliable measures for most participants, but were more challenging for younger or less able individuals.
A new study by New York University researchers reveals that flame retardants and pesticides are now the leading causes of IQ loss in children, outweighing heavy metals. The study found that over 1 million children suffered from intellectual disability between 2001 and 2016 due to exposure to these toxic chemicals.
A study of 368 mothers and their children found that maternal obesity during pregnancy was strongly associated with lower motor skills in boys and scores 5 or more points lower on full-scale IQ tests at age 7. A nurturing home environment lessened these negative effects.
Research finds impaired motor skills in preschoolers and lower IQ in middle childhood for boys whose mothers were severely overweight during pregnancy. A nurturing home environment can lessen the negative effects of obesity on child development.
Research finds children of abusive mothers are almost 50% more likely to have a low IQ at age 8, with the risk rising to 34.6% if mothers were repeatedly exposed to domestic violence. The study used data from over 3,997 mother-child pairs and controlled for other risk factors.
A study found that selecting embryos based on traits like height or IQ using current knowledge of gene variants may not be effective in increasing the desired traits. The simulations used real-world data to confirm predictions about traits were not always accurate, and limitations such as variability and ethnicity make it challenging.
An observational study found a significant association between maternal urinary fluoride concentrations and lower IQ scores measured in children aged 3-4. Maternal exposure to 1-mg/L of fluoride was associated with a 4.5-point lower IQ score in boys, while a higher intake of fluoride was linked to a 3.7 point lower IQ score among both ...
A study found that individuals carrying the APOE4 allele, present in 15% of the population, showed lower IQ scores during childhood and adolescence. These findings suggest that the gene may impact cognitive health as early as age 6½ and become increasingly detrimental with aging.
A study found that certain genetic variants in children may make them more vulnerable to the toxic effects of prenatal methylmercury exposure. The research, led by the Barcelona Institute for Global Health, suggests around 30% of children carry a gene variant increasing their risk.
A study published in Journal of Neurotrauma found that younger age and higher intelligence are associated with greater cognitive recovery after TBI. Cognitive reserve also plays a significant role in the recovery process, suggesting that rehabilitation strategies should take these factors into account.
A new study published in PLOS ONE suggests that IQ is a better indicator of adult wealth than math skills for very preterm and very low-weight babies. The research followed over 400 children born in Bavaria, Germany, from birth to adulthood and found that IQ was a stronger predictor of life course economic success.
Researchers found that epigenetic changes in genes related to dopamine neurotransmission are associated with lower IQ test results. The study suggests environmentally-induced gene activity plays a significant role in intelligence.
Researchers at Osaka University demonstrate a link between IQ decline and work outcome in patients with schizophrenia. The study provides a method for estimating probabilities of work outcome, promoting reintegration into society and treatment motivation.
A meta-analysis of 42 studies found that an additional year of education correlates with an average increase of 3.394 IQ points, with effects lasting even into adulthood. The study's findings suggest that education has a long-lasting impact on intelligence, regardless of age.
A recent study developed a model to predict the effect of genetic variants on cognitive traits, opening the way for better interpretation of genetic analyzes and early care for children at risk. The discovery paves the way for clinicians to estimate cognitive impact of rare genetic variants.
The partnership combines two leading institutes dedicated to theoretical physics, aiming to tackle the hardest questions in physics. Researchers will work together to explore quantum phenomena, reconcile Einstein's theory of gravity with quantum theory, and develop practical technologies.
A new study by University of Illinois researchers found that students who behaved responsibly in high school, showed interest, and had good writing skills tend to earn higher incomes and have higher occupational prestige 50 years later. Education was the factor mediating this relationship.
Children with chronic kidney disease (CKD) experience deficits in academic skills, visual and verbal memory, and executive function, according to a new study. The analysis of 34 studies found that CKD patients have an average IQ 10 points lower than healthy children, with those on dialysis showing an even greater decline.
Researchers used functional MRI scans to measure brain entropy in 892 participants and found a strong link between higher entropy and intelligence, as measured by standard IQ tests. This suggests that brain imaging could one day help assess problems in brain function for conditions like depression and autism.
Research found adults with psychotic disorders experience cognitive decline in early childhood and adolescence, suggesting potential for early intervention to prevent illness onset. The study tracked IQ scores and cognitive abilities throughout the first two decades of life among individuals who developed psychotic disorders in adulthood.
Researchers at the University of Cambridge have developed a new brain mapping technique that highlights the relationship between brain connectivity and IQ. The study found a significant link between the density of connections in higher-order brain regions and individual intelligence.
Young people's ability to perform well at two popular video games is linked to high levels of intelligence, according to researchers at the University of York. The study found a correlation between skill at certain online games of strategy and intelligence, similar to traditional strategy games like chess.
A new study reveals that visual intelligence is a separate entity from general intelligence (IQ), with considerable individual differences among people. Researchers developed a novel test to measure visual object recognition and found that performance on this task was not predictive of IQ.
Researchers found a stable general factor of risk preference that affects decisions across different areas of life. This trait shares the psychometric structure of major psychological characteristics and can be measured using self-reports and frequency measures of actual risky activities.
Researchers found OCD is associated with normative IQ that is slightly lower than control samples, suggesting slowness rather than intellectual ability. The myth may decrease motivation for seeking help, as TV programs like Monk perpetuate the misconception of OCD being linked to superior intelligence.
A large study found that higher childhood intelligence is associated with a lower lifetime risk of death from various causes, including respiratory disease, coronary heart disease, and stroke. The study of over 65,000 individuals suggests that lifestyle factors like tobacco smoking play a significant role in this relationship.
A study published in the European Journal of Personality found that individuals with higher intelligence, maturity, extraversion, and interests in arts and sciences are less likely to lose their jobs to robots. The research suggests traditional education may not be enough to prepare people for future job changes.
A long-term study of over 500 children found that higher blood lead levels in childhood were associated with lower IQ points and lower adult occupational standing. The effects are slight but significant, suggesting that even small amounts of lead exposure can have lasting impacts on cognitive abilities.
A study found that New Zealand children exposed to high levels of lead in the 1970s and 1980s had lower IQs and social standing by age 38, with effects persisting for decades. The research suggests a significant impact of environmental pollutants on cognitive outcomes.
A randomized trial found that prenatal DHA supplementation had no effect on cognitive, language, and motor development in children at 7 years of age. The study also revealed a possible negative impact on parent-rated behavior and executive functioning.
A nationwide study of Swedish children reveals a small association between exposure to surgery anesthesia before age 4 and slightly lower school grades at 16. Children with multiple surgeries had lower IQ scores, but the effects were small.
A recent study published in the Journal of Alzheimer's Disease found that DHA supplementation improved Full-Scale Intelligence Quotient (IQ) by 10% and increased scores on Information and Digit Span sub-tests, indicating significant improvements in long-term and short-term memory.
Researchers found that levetiracetam and topiramate do not reduce IQs or thinking skills in children, unlike valproate which had lower IQ scores, averaging 11 points lower. The study suggests these newer medications are safer alternatives for pregnant women with epilepsy.
Research by UCSB psychologist John Protzko found that environmental interventions can temporarily boost general intelligence in low-birth-weight children. The effects, however, diminish over time, a phenomenon known as the 'fadeout effect'. This suggests that underlying cognitive abilities may not be the primary drivers of intelligence.