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Published on: February 14, 2014
Motor development in infancy is related to cognitive function at 4 years of age
Kirsten R Heineman1,2, Pamela Schendelaar1, Edwin R Van den Heuvel3
1Division of Developmental Neurology, Department of Paediatrics, University Medical Center Groningen, Groningen, the Netherlands.
Insights
Infant motor development, particularly variation and performance, is linked to cognitive function at age four. Lower motor scores in infancy correlate with reduced IQ scores later in childhood.
Area of Science:
- Developmental Psychology
- Pediatric Neurology
- Child Development Studies
Background:
- Growing evidence suggests a strong interrelation between motor skills and cognitive development.
- Understanding these early developmental links is crucial for identifying potential developmental trajectories.
Purpose of the Study:
- To investigate the association between infant motor development and cognitive function at four years of age.
- To determine if specific aspects of early motor behavior predict later cognitive abilities.
Main Methods:
- Prospective cohort study of 223 children born after assisted reproductive techniques.
- Motor behavior assessed using the Infant Motor Profile (IMP) at 4, 10, and 18 months.
- Cognitive function evaluated at 4 years using the Kaufman Assessment Battery for Children (KABC-II).
- Latent class growth modeling employed to analyze relationships between motor and cognitive scores.
Main Results:
- Infants with lower overall IMP scores demonstrated an 8.9-point lower IQ at age four compared to peers with typical scores.
- Specifically, low scores in motor variation and performance were associated with significantly lower IQs (6.1 and 13.2 points, respectively).
Conclusions:
- Early motor development in infancy is directly associated with cognitive function at four years of age.
- The findings highlight motor variation and performance as key predictors of later cognitive abilities.
- The observed differences in IQ are considered clinically relevant, underscoring the importance of early motor assessment.
Aim:
Evidence is accumulating that motor and cognitive development are interrelated. This study investigates associations between motor development in infancy and cognitive function at 4 years of age.
Method:
This study is part of the Groningen prospective cohort study on the development of children born after assisted reproductive techniques such as in vitro fertilization. The study group consisted of 223 children (119 males, 104 females) born to subfertile couples (median gestational age 39.6wks, range 30-43wks). Motor behaviour was assessed with the Infant Motor Profile (IMP) at 4 months, 10 months, and 18 months. IQ was evaluated at 4 years with the Kaufman Assessment Battery for Children, Second Edition. Latent class growth modelling was used to analyse relations between IMP and IQ scores.
Results:
Infants with low total IMP scores had an IQ that was 8.9 points lower at 4 years than infants with typical IMP scores (95% confidence interval 3.6-14.1). Also, low scores in the domains of variation and performance were associated with a lower IQ at 4 years of age, by 6.1 points and 13.2 points respectively.
Interpretation:
Motor development in relatively low-risk infants is associated with cognition at 4 years of age. In particular, low motor variation and performance are associated with a lower IQ at 4 years of age.
What This Paper Adds:
Motor development in infancy is directly related to cognitive function at 4 years of age. This relationship is most pronounced for infant motor variation and performance. The size of the differences in IQ is clinically relevant.
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