Common aetiology for diverse language skills in 41/2-year-old twins

Multivariate genetic analysis was used to examine the genetic and environmental aetiology of the interrelationships of diverse linguistic skills. This study used data from a large sample of 4 1/2 year-old twins who were tested on measures assessing articulation, phonology, grammar, vocabulary, and verbal memory. Phenotypic analysis suggested two latent factors: articulation (2 measures) and general language (the remaining 7), and a genetic model incorporating these factors provided a good fit to the data. Almost all genetic and shared environmental influences on the 9 measures acted through the two latent factors. There was also substantial aetiological overlap between the two latent factors, with a genetic correlation of 0·64 and shared environment correlation of 1·00. We conclude that to a large extent, the same genetic and environmental factors underlie the development of individual differences in a wide range of linguistic skills

Early Predictors Of Creative Writing At Age 9

The present study investigated the extent to which creative expressiveness in writing at age 9 could be predicted by early human figure drawing ability and general cognitive ability, measured at age 4. Participants (N=277) were members of the Twins Early Development Study, for whom measures of human figure drawing and general cognitive ability were available at age 4 and a measure of creative writing was available at age 9. Creativity was measured with the Consensual Assessment Technique, which is a commonly used technique to estimate creativity of a product. Each story, based on three pictures shown to children, was coded on 10 dimensions by five independent judges. Creative Expressiveness score was created as a composite measure of dimensions that correlated highly with creativity dimension. Human figure drawing ability, measured by The Draw-A-Child test at 4, was found to be a weak but significant predictor of Creative Expressiveness at age 9 (r =.17). General cognitive ability at 4 did not predict Creative Expressiveness in writing at 9. It is concluded that examining individual differences in human figure drawing ability may provide a promising direction for exploring the early antecedents of creativity throughout childhood

Creative Storytelling In Childhood Is Related To Exam Performance At Age 16

Creativity is only partly recognised in education. A recent meta-analysis estimated a correlation of r = 0.22 between creativity and educational achievement across many international student samples of all educational levels. In the meta-analysis, creativity was measured with a variety of measures, including divergent thinking and remote association tasks. The differences in the measures influenced the strength of the relationship between creativity and educational achievement. More research is needed to establish reliable measures of creativity, especially in primary school children, whose creativity remains poorly evaluated. The present study measured creativity in written stories in children at age 9 using the Consensual Assessment Technique (CAT). The study employed a longitudinal design, using CAT creativity scores as a predictor of educational achievement at age 16. Each of the stories from 59 children were coded by 6 different judges for 10 dimensions, including creativity. The inter-rater reliabilities between the judges for the 10 dimensions were high (α = .76 - .95). Among the dimensions, a factor analysis revealed two factors: Creative Expressiveness and Logic. The Creative Expressiveness factor explained an additional 7 % of variance in English grades, but not in Maths, beyond intelligence, previous achievement and personality traits associated with creativity. Overall, the study showed that CAT is a robust and reliable measure to detect verbal creativity in childhood. The results also suggest that early creativity predicts later academic achievement, calling for more attention to early creativity assessment and development

Assessing Creative Expressiveness In Children's Written Stories Using The Consensual Assessment Technique

The study investigated methodological issues relating to the use of the Consensual Assessment Technique (CAT) for measuring creativity in children’s written stories. The CAT is a commonly used measure to estimate creativity of a product, based on social recognition of creativity by independent judges. Across domains, the CAT has shown high inter-rater reliability. The present study utilised the CAT to assess creativity in children’s written stories. The stories were also evaluated for: Imagination, Novelty, Liking (how much the judges liked the story), Detail, Emotion, Vocabulary, Straightforwardness, Logic and Grammar. The sample consisted of 277 nine-year-olds. The results showed that to reach sufficient inter-rater reliability, 5 coders were needed. The results gave evidence of a 2-factor structure among the 10 dimensions, indexing ‘Creative Expressiveness’ and ‘Logic’ constructs related to individual differences in writing. Girls outperformed boys on both constructs. The story length was positively correlated with the constructs, explaining 63% of the variance in Creative Expressiveness, and 42% in Logic. Creative Expressiveness was positively correlated with verbal ability (r = .20) and with teacher rating of writing (r = .28). Similarly, Logic was also correlated with verbal ability (r = .34) and teacher rating of writing (r = .44). The findings inform future research employing the CAT to measure creativity in children’s storytelling

Gene-Environment Interaction in the Etiology of Mathematical Ability Using SNP Sets

Mathematics ability and disability is as heritable as other cognitive abilities and disabilities, however its genetic etiology has received relatively little attention. In our recent genome-wide association study of mathematical ability in 10-year-old children, 10 SNP associations were nominated from scans of pooled DNA and validated in an individually genotyped sample. In this paper, we use a ‘SNP set’ composite of these 10 SNPs to investigate gene-environment (GE) interaction, examining whether the association between the 10-SNP set and mathematical ability differs as a function of ten environmental measures in the home and school in a sample of 1888 children with complete data. We found two significant GE interactions for environmental measures in the home and the school both in the direction of the diathesis-stress type of GE interaction: The 10-SNP set was more strongly associated with mathematical ability in chaotic homes and when parents are negative

Preschool Verbal and Nonverbal Ability Mediate the Association Between Socioeconomic Status and School Performance

We compared the extent to which the long-term influence of family socioeconomic status (SES) on children's school performance from age 7 through 16 years was mediated by their preschool verbal and nonverbal ability. In 661 British children, who completed 17 researcher-administered ability tests at age 4.5 years, SES correlated more strongly with verbal than nonverbal ability (.39 vs.26). Verbal ability mediated about half of the association between SES and school performance at age 7, while nonverbal ability accounted for a third of the link. Only SES, but not verbal or nonverbal ability, was associated with changes in school performance from age 7 to 16. We found that SES-related differences in school performance are only partly transmitted through children's preschool verbal abilities

Genome-wide association study of receptive language ability of 12 year olds

Purpose: We have previously shown that individual differences in measures of receptive language ability at age 12 are highly heritable. The current study attempted to identify some of the genes responsible for the heritability of receptive language ability using a genome-wide association (GWA) approach. Method: We administered four internet-based measures of receptive language (vocabulary, semantics, syntax, and pragmatics) to a sample of 2329 12-year-olds for whom DNA and genome-wide genotyping were available. Nearly 700,000 single-nucleotide polymorphisms (SNPs) and one million imputed SNPs were included in a GWA analysis of receptive language composite scores. Results: No SNP associations met the demanding criterion of genome-wide significance that corrects for multiple testing across the genome (p < 5 ×10-8). The strongest SNP association did not replicate in an additional sample of 2639 12-year-olds. Conclusion: These results indicate that individual differences in receptive language ability in the general population do not reflect common genetic variants that account for >3% of the phenotypic variance. The search for genetic variants associated with language skill will require larger samples and additional methods to identify and functionally characterize the full spectrum of risk variants

Brain correlates of non-symbolic numerosity estimation in low and high mathematical ability children

Previous studies have implicated several brain areas as subserving numerical approximation. Most studies have examined brain correlates of adult numerical approximation and have not considered individual differences in mathematical ability. The present study examined non-symbolic numerical approximation in two groups of 10-year-olds: Children with low and high mathematical ability. The aims of this study were to investigate the brain mechanisms associated with approximate numerosity in children and to assess whether individual differences in mathematical ability are associated with differential brain correlates during the approximation task. The results suggest that, similarly to adults, multiple and distributed brain areas are involved in approximation in children. Despite equal behavioral performance, there were differences in the brain activation patterns between low and high mathematical ability groups during the approximation task. This suggests that individual differences in mathematical ability are reflected in differential brain response during approximation

Maths Anxiety Does Not Moderate the Link Between Spatial and Maths Ability

Spatial ability (SA) is known to be closely related to mathematical ability (Tosto et al., 2014). Maths anxiety (MA) has been shown to affect both mathematical and spatial ability (Maloney, 2011). The present study investigated the relationship between maths performance and spatial ability, as well as the effects of MA and gender on the association between them. General cognitive ability and trait anxiety were added as control variables. Data were collected from 146 twins (32% males) aged 17-33. Maths performance was measured with Problem Verification Task (PVT). SA was measured with Mental rotation task. MA was measured with sMARS questionnaire. General cognitive ability was measured with Raven’s matrices. Trait anxiety was measured with Spielberger anxiety rating scale. There were no correlations between SA and maths performance, except a negative correlation between SA and PVT reaction time variance. MA did not moderate the association between SA and maths performance. Interestingly, the interaction term between trait anxiety and SA was significant as a predictor for PVT reaction time. Posthoc analysis showed that higher spatial ability was associated with lower reaction time in PVT for high trait anxiety individuals only. Neither main effects of gender and maths anxiety, nor the interaction term between them were significant while predicting spatial ability. Altogether, our results indicate that the interplay between anxiety and mathematical cognition is complex and requires further research

Pleiotropy across academic subjects at the end of compulsory education.

Research has shown that genes play an important role in educational achievement. A key question is the extent to which the same genes affect different academic subjects before and after controlling for general intelligence. The present study investigated genetic and environmental influences on, and links between, the various subjects of the age-16 UK-wide standardized GCSE (General Certificate of Secondary Education) examination results for 12,632 twins. Using the twin method that compares identical and non-identical twins, we found that all GCSE subjects were substantially heritable, and that various academic subjects correlated substantially both phenotypically and genetically, even after controlling for intelligence. Further evidence for pleiotropy in academic achievement was found using a method based directly on DNA from unrelated individuals. We conclude that performance differences for all subjects are highly heritable at the end of compulsory education and that many of the same genes affect different subjects independent of intelligence