A systematic assessment of socioeconomic status and executive functioning in early childhood

Area of Science:

• Developmental Psychology
• Cognitive Neuroscience
• Socioeconomic Factors

Background:

• Lower socioeconomic status (SES) is consistently linked to diminished executive function (EF) in children.
• Understanding the specific processes through which SES impacts EF is crucial for targeted interventions.
• Early childhood (4.5-5.5 years) is a critical period for EF development, with components becoming distinct.

Purpose of the Study:

• To systematically investigate the relationship between SES and specific components of executive function in young children.
• To examine how SES affects working memory, inhibitory control, and vigilance at a process level.
• To identify whether emerging EF skills are differentially impacted by SES.

Main Methods:

• Assessed 4.5-5.5-year-old children using working memory and go/no-go tasks.
• Measured accuracy and reaction time across four blocks to assess performance over time.
• Included a cognitive load component in the working memory task.

Main Results:

• Lower SES was associated with lower accuracy in working memory, inhibitory control, and vigilance.
• Slower reaction times were observed for working memory in lower SES children, but not for the go/no-go task.
• No SES differences were found for higher cognitive load working memory trials or for performance maintenance over time.

Conclusions:

• While lower SES impacts several EF components in early childhood, emerging skills like performance maintenance and remembering two items may be less affected.
• Findings underscore the multidimensional nature of EF and suggest that interventions should consider developmental trajectories.
• Further research can refine targets for interventions aimed at mitigating SES-related disparities in EF.