Contextualizing Socioeconomic Status Effects on Adolescent Brain Structure and Cognitive Skills: Evidence From the...

Area of Science:

• Neuroscience
• Developmental Psychology
• Human Behavior

Background:

• Youth socioeconomic status (SES) is linked to cognitive and neural development.
• Environmental factors beyond income and education influence these outcomes.
• The intraparietal sulcus (IPS) is crucial for numerical and general processing.

Purpose of the Study:

• To explore associations between SES indicators, home context qualities, neural structure, and cognitive skills in adolescents.
• To examine independent and interacting effects of SES and home environment on brain and cognition.
• To compare theory-driven and data-driven approaches for understanding developmental influences.

Main Methods:

• Utilized data from the Adolescent Brain Cognitive Development (ABCD) study (n=8,764).
• Employed theory-driven analyses focusing on the IPS and random forest regression (RFR) for brain-wide generalizability.
• Conducted data-driven analyses to assess the scope of neural associations.

Main Results:

• Caregiver attentiveness positively associated with cognitive skills; nightly sleep associated with IPS structure, controlling for SES.
• Home learning emphasis and organization moderated SES associations with IPS morphology and cognition.
• Data-driven analyses revealed broader associations with frontal and temporal cortical measures, not solely IPS.

Conclusions:

• Home context factors like attentiveness and sleep quality are vital for adolescent cognitive and neural development.
• Interventions should consider modifiable home environment factors to support youth development.
• Integrating theory-driven and data-driven methods provides a more comprehensive understanding of SES-cognition-brain relationships.