A child’s intelligence quotient, or IQ, usually reflects the educational attainment of his or her parents, especially for adolescents who are subject to psychological evaluation. A recent study published in Scientific Reports shows that a mother’s education level acts as a particularly strong predictor of her child’s cognitive test scores. Medical professionals often use these standardized indicators to construct a comprehensive picture of a young patient’s developmental trajectory. These findings suggest that public health efforts may need to target caregiver education to help families recognize early developmental challenges, even in countries with free health care systems.
People tend to think of intelligence as an immutable quality inherited directly from parents. Although genetic inheritance accounts for a significant portion of a person’s cognitive abilities, genes do not function in isolation. Researchers are investigating the correlation between genotype and environment. This correlation is a concept that explains how small biological advantages are amplified when individuals engage with an environment that supports their genetic predispositions. Parents’ own intelligence influences the home environment they create, which has a positive relationship with children’s cognitive and physical development over time.
Family routines and daily habits, driven in part by adults in the household, influence academic performance independently of children’s genetic cognitive abilities. In developmental psychology, researchers pay close attention to how caregivers’ backgrounds influence their navigation in the medical field. Parents serve as the child’s primary advocate and direct the family when and where to seek help. Their educational background shapes their understanding of typical child development and influences when behavioral problems require professional intervention.
Parents with higher education levels have higher health literacy and may be able to better understand medical information and access support systems without delay. To examine these dynamics directly, a team of researchers led by Urszula Sajewicz-Ratke of the Institute for Psychoeducational Testing in Gdańsk, Poland, investigated how parental education is related to the intelligence level of children seeking psychological support. The researchers wanted to establish whether the mother’s or father’s educational background served as a stronger predictor of children’s cognitive scores. They also aimed to test whether biological sex and youth’s age alter these established associations.
Poland provides a widely available mental health care system without paying any direct fees to its citizens. This structure provides a research environment in which absolute financial constraints do not primarily determine clinical referrals. Researchers conducted a large-scale study examining digital clinical records accumulated between 2018 and 2023. The final data set included 80,303 children aged 3 to 18 who were referred to the mental health system by their parents.
The team took a cross-sectional approach, so they looked at diagnostic data from a single point in time for each participant, rather than following the same individuals over several years. During the clinic visit, each child completed the Stanford-Binet Intelligence Test. This standardized assessment measures a wide range of cognitive abilities and produces an overall intelligence quotient along with specific scores for verbal and nonverbal skills. This test divides human intelligence into distinct categories such as fluid reasoning, basic knowledge, quantitative reasoning, visual-spatial processing, and working memory.
The researchers categorized children based on whether their parents completed primary, vocational, secondary, or tertiary education. Systematic analysis demonstrated a positive correlation between parental educational history and patient cognitive ability. In general, children from well-educated families achieved higher intelligence scores than children from less-schooled families. When parents were assessed separately, maternal education emerged as a stronger predictor of children’s intelligence.
Mother’s schooling accounted for 18% of the variance in children’s overall cognitive scores, and father’s schooling accounted for approximately 16%. The research team attributed this difference to current social structures and family relationships. They pointed out that despite the increased involvement of fathers in modern times, in most families mothers are still primarily in charge of daily childcare and early education routines. Beyond broad intelligence quotients, researchers isolated specific cognitive domains measured by clinic assessments.
They found that parental education was more strongly related to children’s verbal intelligence than to their nonverbal abilities. Influential theories in cognitive psychology suggest that language skills and continuous knowledge acquisition are highly dependent on environmental stimuli. Families that provide rich educational experiences and diverse vocabularies directly enhance children’s language skills. Conversely, mental traits such as working memory and fluid reasoning are highly dependent on the underlying neurobiology.
Data supported this well-established framework, showing that parental education strongly predicted children’s performance in general knowledge categories but had lower predictive power when it came to working memory. The researchers analyzed whether demographic characteristics altered these statistical associations to find additional patterns. Parameters regarding the child’s biological sex were not statistically significant. In other words, gender did not significantly alter the relationship between parental education and general intelligence. However, patient age played a unique role in the referral process.
Researchers matched age data with standard intelligence scores and found that people followed different trajectories based on family background. For parents with no primary or vocational education, the average intelligence scores of children brought to the clinic were lower in older age groups. In contrast, parents with college degrees were more likely to refer older children with higher average intelligence scores. The research team linked these age-related variations to structural milestones within local school systems.
In Poland, children undergo a compulsory school readiness assessment around the age of six, often prompting families to seek further testing. The researchers suggested that families with minimal formal education may wait until outside educational institutions identify severe cognitive impairment before seeking clinical help. For these families, medical referrals peak when academic delays become impossible to ignore. Families with extensive educational backgrounds may seek evaluation of older children, not for intellectual deficiencies, but to address other emotional, social, or psychological concerns that emerge during adolescence.
Although the sample size was broad, this study includes several design limitations that impact general application. The researchers did not know what psychiatric or behavioral diagnoses the participants were ultimately assigned because privacy laws limit sharing detailed medical histories. The scope of the investigation remained narrow, focusing solely on intelligence tests without detailing the specific symptoms or behavioral conflicts that brought the family to the clinic in the first place. Additionally, researchers had to exclude hundreds of thousands of customer files because they lacked complete demographic data on parents.
Reliance on such filtered datasets means that the results may not be fully representative of the entire population of families using the health care system. This result highlights that a universal healthcare framework does not automatically guarantee equitable access across different socio-demographics. Caregivers with minimal formal education appear to interact differently with the health care system, often waiting until their child shows significant cognitive delays. To address this social disparity, researchers suggest implementing community programs aimed at teaching parents about typical child development and early warning signs of psychological distress.
Focusing these educational efforts in communities with fewer educational resources may facilitate earlier medical intervention. Although establishing widespread community education requires financial investment, identifying developmental challenges early in life typically reduces long-term medical and societal costs associated with delayed treatment. Incorporating mental health screening into routine pediatric visits may also help bridge the gap between health care departments and families who may delay seeking help. Future research will need to investigate how parental education shapes the presentation of other psychological states beyond basic cognitive tests.
The study, “The association between parental education level and children’s intelligence with reference to the mental health system: a cross-sectional study in Poland”, was authored by Urszula Sajewicz Radtke, Ariadna Ouada Maszko, Michał Oleci, Paweł Jurek, Uča Bielenik and Bartosz M. Radtke.
