Language and motor plasticity in toddlerhood and early preschool as predictors of intelligence in late preschool.

Researchers studied 423 children to see how language and movement skills in early years affected thinking abilities later on. Children who improved their understanding of language, speaking, and movement skills had better thinking test scores. This was true even for children with autism or ADHD. The study shows that helping children develop these skills early can lead to better outcomes later.

This retrospective study examined 423 children aged 2-5 years who received early intervention in Taiwan, investigating how language and motor development changes predicted later intelligence. The study found that receptive language development showed the strongest association with intelligence outcomes, followed by gross motor, expressive language, and fine motor development. Children who demonstrated catch-up development in any of these areas achieved better IQ scores than those with persistent delays. Notably, the presence of ASD or ADHD diagnoses did not modify these relationships.

The findings emphasize the importance of plasticity in early development and support the value of early intervention targeting language and motor skills during toddlerhood and preschool years.

Early intervention targeting language and motor development may improve cognitive outcomes. Receptive language should be prioritized in intervention planning. Children showing developmental plasticity have better prognosis regardless of ASD/ADHD status, supporting comprehensive early intervention approaches.

Retrospective design limits causal inference. The study was conducted at a single medical center in Taiwan, potentially limiting generalizability. The abstract does not specify intelligence assessment methods or detail intervention types received.

Early language and motor development may influence cognitive function in a cascading manner later in life. This study aimed to explore the impact of language and motor plasticity during toddlerhood and early preschool years on intelligence in late preschool, with an additional consideration of the influence of ASD and ADHD diagnoses. We retrospectively collected medical chart from 423 children aged 2-5 years (316 boys and 107 girls; mean age at Time 1: 3.49 ± 0.98 years), who participated in an early intervention program at a medical center in Northern Taiwan. Language and motor development along with demographic information were assessed during the initial evaluation (Time 1).

These assessments were repeated, and intelligence was measured at the follow-up (Time 2). A generalized linear model was used for the data analysis. Receptive language developmental change was the strongest predictor of lower intelligence quotient (IQ) scores, followed by gross, expressive language, and fine motor developmental changes (all p < 0.01). Children with catch-up receptive or expressive language or gross or fine motor development had better IQ outcomes than those with persistent delay (all p < 0.001).

There were no ASD-by-developmental type or ADHD-by-developmental type interactions predicting IQ. Better plasticity in language and motor abilities during toddlerhood and early pre-school years was associated with better intelligence in the late pre-school years. The importance of early and effective interventions for language and motor development has been highlighted.