How a parent’s education level predicts cognitive scores in children receiving mental health support

A child’s intelligence quotient, or IQ, usually reflects the educational background of their parents, especially among youth referred for psychological evaluations. Recent research published in Scientific Reports indicates that a mother’s education level acts as a particularly strong predictor of a child’s cognitive test scores. Medical professionals often use these standardized metrics to build a comprehensive picture of a young patient’s developmental trajectory. These findings suggest that public health initiatives might need to target caregiver education to help families recognize early developmental challenges, even in countries with free healthcare.

People often think of intelligence as an unchangeable trait inherited directly from one’s parents. While genetic inheritance accounts for a substantial portion of a person’s cognitive ability, genes do not operate in a vacuum. Researchers examine the genotype-environment correlation, a concept describing how small biological advantages become amplified when individuals engage with environments that support their inherited predispositions. A parent’s own intelligence influences the home environment they create, which positively relates to a child’s cognitive and physical development over time.

Family routines and daily habits, driven in part by the adults in the home, play a role in academic achievement that operates independently of the child’s inherited cognitive capacity. In developmental psychology, researchers pay close attention to how a caregiver’s background affects their navigation of the medical sector. Parents serve as the primary advocates for their children, dictating when and where a family seeks help. Their educational background shapes their understanding of typical child development and influences when they decide a behavioral issue warrants professional intervention.

A well-educated parent might possess higher health literacy, allowing them to better understand medical information and access support systems without delay. To investigate these dynamics directly, a research team led by Urszula Sajewicz-Radtke from the Laboratory of Psychological and Educational Tests in Gdańsk, Poland, explored how parental schooling connects to the intelligence levels of children seeking psychological support. The researchers wanted to establish whether the educational attainment of the mother or the father served as a stronger predictor of a child’s cognitive scores. They also aimed to test whether the biological sex and the age of the youth altered these established associations.

Poland offers a widely accessible mental healthcare system without direct user fees for its citizens. This structure provides a research setting where absolute financial constraints do not primarily dictate clinical referrals. The researchers conducted a large study examining digital clinical records accumulated between 2018 and 2023. The final dataset included 80,303 children between the ages of three and eighteen who had been referred to the mental health system by their parents.

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Because the team took a cross-sectional approach, they looked at diagnostic data from a single point in time for each participant rather than tracking the same individuals over several years. During their clinic visits, each child completed the Stanford-Binet Intelligence Scales. This standardized assessment measures a broad spectrum of cognitive abilities, generating an overall intelligence quotient alongside specific scores for verbal and nonverbal skills. The test breaks down human intelligence into distinct categories, such as fluid reasoning, basic knowledge, quantitative reasoning, visual-spatial processing, and working memory.

The team categorized the parents based on whether they had completed primary, vocational, secondary, or higher education. The systematic analysis demonstrated a positive correlation between the educational history of the parents and the cognitive performance of the patients. Children from families with higher educational attainment generally achieved higher intelligence scores than peers from families with less schooling. When evaluating the parents separately, the mother’s educational background emerged as a more powerful predictor of the child’s intelligence.

A mother’s schooling accounted for eighteen percent of the variance in a child’s overall cognitive score, while a father’s schooling accounted for roughly sixteen percent. The research team attributed this difference to current social structures and family dynamics. They noted that despite a modern increase in paternal involvement, mothers still primarily manage daily childcare and early educational routines in most households. Beyond the broad intelligence quotient, the researchers isolated the specific cognitive domains measured by the clinic’s assessment.

They found that parental education related more strongly to a child’s verbal intelligence than to their nonverbal abilities. According to dominant theories in cognitive psychology, verbal skills and continuous knowledge acquisition rely heavily on environmental stimulation. A home that provides rich educational experiences and varied vocabulary directly enhances a child’s verbal capabilities. Conversely, mental traits like working memory and fluid reasoning heavily depend on underlying neurobiology.

The data supported this established framework, showing that parental education strongly predicted a child’s performance in the general knowledge category, but had less predictive power regarding working memory. The researchers analyzed whether demographic traits altered these statistical associations to find additional patterns. The parameters regarding the biological sex of the child were not statistically significant, meaning sex did not meaningfully change the relationship between parental education and general intelligence. However, the age of the patient played a distinctive role in the referral process.

The researchers mapped the age data against the standard intelligence scores, noticing different trajectories based on family background. For parents restricted to primary or vocational education, the average intelligence scores of the children they brought to the clinic were lower among older age groups. In contrast, parents holding university degrees tended to refer older children who possessed higher average intelligence scores. The research team connected these age-related fluctuations to structural milestones within the regional school system.

In Poland, children undergo a mandatory school readiness evaluation around age six, which often prompts families to seek further testing. The researchers proposed that families with minimal formal education might wait until external educational systems identify severe cognitive difficulties before seeking clinical help. For these families, medical referrals peak when academic delays become impossible to ignore. Families with extensive educational backgrounds might seek evaluations for their older children not because of intellectual deficits, but to address separate emotional, social, or psychological concerns that emerge during adolescence.

Although the sample size was extensive, the study contains several design limitations that influence its general application. Because privacy laws restrict the sharing of detailed medical histories, the researchers did not know what psychiatric or behavioral diagnoses were ultimately assigned to the participants. The investigative scope remained narrow, focusing exclusively on intelligence testing without detailing the specific symptoms or behavioral struggles that initially brought the families to the clinic. Additionally, the researchers had to exclude hundreds of thousands of client files because they lacked complete demographic data regarding the parents.

This reliance on a filtered dataset means the findings might not entirely represent the full population of families utilizing the medical system. The results emphasize that a universally accessible healthcare framework does not automatically guarantee equitable utilization across different social demographics. Caregivers with minimal formal education appear to interact with the medical system differently, often waiting until a child exhibits pronounced cognitive delays. To address this social disparity, the researchers suggest implementing community programs designed to teach parents about typical child development and the early warning signs of psychological distress.

Focusing these educational initiatives on communities with lower educational resources could facilitate much earlier medical interventions. While establishing widespread community education requires financial investment, identifying developmental challenges early in life typically reduces the long-term medical and social costs associated with delayed treatment. Integrating mental health screenings into routine pediatric visits might also bridge the gap between the healthcare sector and families who might otherwise delay seeking support. Future studies will need to explore how a parent’s education shapes the presentation of other psychological conditions beyond basic cognitive testing.

The study, “Association between parental education level and intelligence quotient of children referred to the mental healthcare system: a cross-sectional study in Poland,” was authored by Urszula Sajewicz-Radtke, Ariadna Łada-Maśko, Michał Olech, Paweł Jurek, Łucja Bieleninik, and Bartosz M. Radtke.