Early giftedness rarely lasts into adulthood, large developmental study finds

A groundbreaking study published in the journal Intelligence & Cognitive Abilities suggests that early signs of exceptional intelligence tend to fade as children transition into adulthood. Researchers from Spain's Universitat de Lleida, Universidad Complutense de Madrid, and Universidad Autónoma de Madrid collaborated on the investigation, analyzing data from thousands of participants in the Twins Early Development Study.

The study aimed to understand if the cognitive advantages observed in early childhood intelligence tests persist or if they diminish over time. Early childhood intelligence tests are commonly used to place children in specialized gifted programs, prompting the assumption that these young prodigies would maintain their intellectual edge throughout life.

However, the research revealed that this assumption is incorrect, with only a small fraction retaining their high cognitive scores into adulthood. In the study, participants were divided into two groups based on their cognitive scores at age seven. The high-ability group, representing 1,580 individuals who scored above 115 points, saw a significant drop in their cognitive abilities over the subsequent years, with only 16 percent maintaining their high scores by age sixteen.

In contrast, the normative group, comprising 3,958 participants scoring in the average range, showed a more modest decline, with only 8 percent of the initial group rising to the high-ability tier by age sixteen. The study also explored various factors that might predict these cognitive trajectories. Genetic factors, such as polygenic scores, which estimate an individual's genetic predisposition to intelligence based on their entire genome, emerged as the most significant predictors of stable cognitive performance.

Parental socioeconomic status also played a critical role, but its impact was less pronounced than genetic factors. Interestingly, environmental influences like home chaos, behavioral problems, and stressful life events had a negligible effect on the cognitive development of high-ability individuals. The researchers concluded that while early identification of giftedness through intelligence tests can be helpful, it may rely on unstable measures.

They emphasized the importance of focusing on the inherent genetic and personal traits rather than merely relying on early test scores to predict long-term intellectual growth.