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Neurocognitive development of young children with sickle cell disease through three years of age
Robert J Thompson1, Kathryn E Gustafson, Melanie J Bonner
1Duke University Medical Center, USA. bobt@asdean.duke.edu
Insights
Children with sickle cell disease (SCD) show declining cognitive function by 24 months. Early interventions are crucial to support neurocognitive development in these young children.
Area of Science:
- Pediatric Neurology
- Developmental Psychology
- Hematology
Background:
- Sickle cell disease (SCD) affects neurocognitive development in young children.
- Understanding risk factors is crucial for early intervention.
Purpose of the Study:
- To assess neurocognitive development in children with SCD from 6 to 36 months.
- To examine contributions of biomedical and parenting risks to child functioning.
- To investigate factors influencing parent adjustment.
Main Methods:
- Longitudinal study of 89 African American children with SCD and their parents.
- Neurocognitive and psychomotor development assessed at 6, 12, 24, and 36 months.
- Parental cognitive processes, adjustment, and family functioning measured via self-report.
Main Results:
- Cognitive functioning (MDI) declined significantly between 12 and 24 months.
- Poorer cognitive function linked to learned-helplessness attributional style and HbSS phenotype.
- Parental adjustment issues associated with daily stress, lack of knowledge, low efficacy, and HbSC phenotype.
Conclusions:
- Young children with SCD are at risk for neurocognitive impairment.
- Findings support early intervention programs to enhance neurocognitive development.
Objective:
To determine (1) the neurocognitive development of children with sickle cell disease (SCD) from 6 months through 36 months of age, (2) the independent and combined contributions of biomedical risk and parenting risk to child neurocognitive functioning, and (3) the independent and combined contributions of biomedical risk, parent cognitive processes, and family functioning to parent adjustment.
Method:
The study sample included 89 African American children and their parents served through the Duke University-University of North Carolina Comprehensive Sickle Cell Center. Measures of cognitive and psychomotor development were obtained at 6, 12, 24, and 36 months of age, and parents completed self-report measures of the cognitive processes of daily stress and attributional style, psychological adjustment, and family functioning.
Results:
There was no significant decrease in psychomotor functioning (PDI) over time but cognitive functioning (MDI) declined, with a significant decrease occurring between the 12- and 24-month assessment points. At 24 months, poorer cognitive functioning was associated with parenting risk, in terms of a learned-helplessness attributional style, and biomedical risk, in terms of HbSS phenotype. Levels of psychological distress within the clinical range were reported by 24% of the parents, and poorer parent adjustment was associated with high levels of daily stress, less knowledge about child development, lower expectations of efficacy, and HbSC phenotype.
Conclusions:
The findings indicate that young children with SCD are at risk for neurocognitive impairment and provide support for the initiation of early intervention studies to promote neurocognitive development.
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