The extent to which parenting influences young children’s cognitive development and language skills depends surprisingly strongly on the extent of social deprivation before birth. Recent American research by Leverett et al, which looked at families with different levels of social deprivation, such as poverty and limited access to healthy food and education, reveals this. Note that the research design only allows for statements about correlations.
Researchers followed pregnant women in St. Louis and later looked at how their children performed on cognitive and language tests when they were two years old. They found that supportive parenting, with lots of positive attention and sensitivity, was especially helpful for families with less severe disabilities. In these families, children had significantly better cognitive skills and language development when parents were attentive and supportive.
Things are different in families struggling with serious disadvantages. There, the same supportive upbringing appears to have less effect. In other words, if the social disadvantage is too great, the positive impact of good parenting seems to be less effective. This does not mean that good parenting is not important, but that parenting alone may not compensate for serious disadvantages.
Researchers also looked at brain scans of the babies shortly after birth. Although babies from disadvantaged families had smaller brain volumes, this did not appear to be why they performed less well on cognitive tests later on. The role of parenting seemed to be more important.
What does this mean in concrete terms? The research shows that tackling disadvantage is crucial if we really want to help young children move forward. Good support for parents can mean a lot, but it is most effective when basic conditions such as sufficient income, nutrition, and access to education are already in place. Simply put, investing in families from the very beginning remains essential to prevent disadvantages from continuing for generations.
Abstract of the study :
Objective
To investigate whether parenting or neonatal brain volumes mediate associations between prenatal social disadvantage (PSD) and cognitive/language abilities and whether these mechanisms vary by level of disadvantage.
Study design
Pregnant women were recruited prospectively from obstetric clinics in St Louis, Missouri. PSD encompasses access to social (eg, education) and material (eg, income to needs, health insurance, area deprivation, and nutrition) resources during pregnancy. Neonates underwent brain magnetic resonance imaging. Mother-child dyads (n = 202) returned at age 1 year for parenting observations and at age 2 years for cognition/language assessments (Bayley Scales of Infant and Toddler Development, Third Edition). Generalized additive and mediation models tested hypotheses.
Results
Greater PSD associated nonlinearly with poorer cognitive/language scores. Associations between parenting and cognition/language were moderated by disadvantage, such that supportive and nonsupportive parenting behaviors related only to cognition/language in children with lesser PSD. Parenting mediation effects differed by level of disadvantage: both supportive and nonsupportive parenting mediated PSD-cognition/language associations in children with lesser disadvantage, but not in children with greater disadvantage. PSD-associated reductions in neonatal subcortical gray matter (β = 0.19; q = 0.03), white matter (β = 0.23; q = 0.02), and total brain volume (β = 0.18; q = 0.03) were associated with lower cognition, but did not mediate the associations between PSD and cognition.
Conclusions
Parenting moderates and mediates associations between PSD and early cognition and language, but only in families with less social disadvantage. These findings, although correlational, suggest that there may be a critical threshold of disadvantage, below which mediating or moderating factors become less effective, highlighting the importance of reducing disadvantage as primary prevention.