Identical Genes, Unique Environments: A Qualitative Exploration of Persistent Monozygotic-Twin Discordance in Literacy and Numeracy

This study aimed to explore unique environmental factors impacting differential academic trajectories among Australian school students. Monozygotic (MZ) twin pairs who were consistently discordant in results of nationwide standardized tests of reading, numeracy or writing between Grades 3 and 9 were identified. MZ twins control for genes, gender, age, and aspects of the home and school environment shared by twins. Thus, any difference between MZ twins in academic outcomes can be attributed to the unique environment experienced by each twin. From 551 MZ twin pairs with three or four sets of test results, we identified 55 pairs who were substantially and consistently discordant in reading, numeracy or writing between Grades 3 and 9. Parents were contacted for interview, resulting in 40 semi-structured interviews. Qualitative data analysis revealed three major themes, interpreted by parents as possible contributors to persistent academic discordance: biological mechanisms, school-based factors, and personal factors. We discuss implications for educational practice, policy, and research

Matthew Effects in Reading and Mathematics: Examining Developmental Patterns in Population Data

This study examined whether Matthew effects were evident in developmental patterns of reading and mathematics skills from middle childhood to adolescence. We obtained standardized reading and mathematics scores at Grades 3, 5, 7 and 9 for full cohorts of students in two Australian states, NSW (N = 88,958, 48% female) and Victoria (N = 65,984, 49% female). Latent growth curve models were used to identify the best-fitting longitudinal trajectories of reading and mathematics, and to examine whether cumulative (i.e. a Matthew effect), compensatory, or stable interindividual differences characterized development in each domain. For both reading and mathematics, and in both samples, growth decelerated as grade levels increased, with latent basis models fitting the data better than linear models. Negative intercept-slope covariances, and decreasing variances at increasing grades in both domains indicated compensatory growth patterns, rather than cumulative patterns or Matthew effects. These results indicate that students with below average achievement at Grade 3 make greater gains to Grade 9 than their initially higher-achieving peers. Modeling growth trajectories in two longitudinal population datasets allows strong tests of theorized growth patterns for both reading and mathematics, and presents insights about developmental change in academic skills from middle childhood to adolescence

Teaching the Teachers the Genetics of Learning: An Application of the Mixed Blessings Model

Decades of educational genetics research have highlighted that differences in academic achievement are partly explained by genetic variation between individuals. Consequently, there is ongoing discussion about whether genetic influences on educationally related traits should be more widely acknowledged in schools and communicated specifically to teachers. Nonetheless, there is little research on how teachers might interpret such information, and how it might alter their perceptions of the students they teach or their teaching practice. In this review, we draw on the mixed blessings model proposed by Haslam and Kvaale, Current Directions in Psychological Science, 2015, 24, 399-404, as a framework for defining both positive and negative repercussions of disseminating the findings of educational genetic research to teachers. We discuss research examining teacher perceptions of student ability and behavior and findings outlining perceptions of psychological disorders when genetic explanations are invoked. We conclude by proposing new directions for research designed to better understand interpretations of genetic information in school contexts

The codevelopment of reading and attention from middle childhood to early adolescence: A multivariate latent growth curve study

Attention skills are strong cross-sectional predictors of reading comprehension from childhood through to adolescence. However, less is known about the developmental relations between these two domains across this period. This study examined the codevelopment of reading and attention in a community sample of 614 Australian school students (50% female). Reading and attention were assessed at ages 8, 10, 12, and 14. Results of univariate latent growth models demonstrated, on average, curvilinear trajectories for reading in which rapid growth across younger age spans decelerates as children reach adolescence. By contrast, attention skills remained relatively stable on average. Significant negative correlations were observed between the intercept and slope factors in separate reading (r = -.62) and attention models (r = -.39) suggesting compensatory growth patterns in which poorer performing students in both domains at age 8 have steeper trajectories than their higher performing peers. A comparison of a multivariate latent growth model and an autoregressive latent trajectory model with structured residuals (ALT-SR) examined the interrelatedness of development in reading and attention. Both between-individual and within-individual cross-domain parameters showed reading and attention to be positively related at Grade 3, indicating an association between better attention and higher reading achievement at age 8. However, there was little evidence for interrelated growth across domains in this sample. The results contribute to theories which explain whether and how multiple cognitive domains codevelop over a substantial period of childhood and early adolescence

Trait Perspective Taking and Romantic Relationship Satisfaction: A Meta-Analysis

This meta-analysis evaluated the association between trait perspective taking and romantic relationship satisfaction. The study synthesized the association in 20 separate samples in a total of 18 published and unpublished studies, involving a total of 4,678 participants. The studies were completed by many different research teams, using different samples, different measures, and various correlational research designs. The results showed a significant association between trait perspective taking and romantic relationship satisfaction (r = .21, 95% confidence intervals [.17, .25]). The results did not vary significantly with whether the respondents were men or women, whether they rated their own perspective taking or that of their partner, or whether the perspective taking assessed was general or specific to the partner. The findings provide a basis for future intervention studies that test whether increasing perspective taking has a positive effect on relationship satisfaction

Test Anxiety and a High-Stakes Standardized Reading Comprehension Test: A Behavioral Genetics Perspective

Past research suggests that reading comprehension test performance does not rely solely on targeted cognitive processes such as word reading, but also on other nontarget aspects such as test anxiety. Using a genetically sensitive design, we sought to understand the genetic and environmental etiology of the association between test anxiety and reading comprehension as measured by a high-stakes test. Mirroring the behavioral literature of test anxiety, three different dimensions of test anxiety were examined in relation to reading comprehension—namely, intrusive thoughts, autonomic reactions, and off-task behaviors. Participants included 425 sets of twins from the Florida Twin Project on Reading. The results indicated test anxiety was negatively associated with reading comprehension test performance, specifically through common shared environmental influences. The significant contribution of test anxiety to reading comprehension on a high-stakes test supports the notion that nontargeted factors might interfere with accurately assessing students’ reading abilities

The public-private debate: school sector differences in academic achievement from Year 3 to Year 9?

A higher proportion of students are privately educated in Australia, compared with many other nations. In this paper, we tested the assumption that private schools offer better quality education than public schools. We examined differences in student achievement on the National Assessment Programme: Literacy and Numeracy (NAPLAN) between public, independent, and catholic schools. Cross-sectional regressions using large samples of students (n = 1583-1810) at Years 3, 5, 7 and 9 showed few sector differences in NAPLAN scores in any domain. No differences were evident after controlling for socioeconomic status and prior NAPLAN achievement. Using longitudinal modelling, we also found no sector differences in the rate of growth for reading and numeracy between Year 3 and Year 9. Results indicate that already higher achieving students are more likely to attend private schools, but private school attendance does not alter academic trajectories, thus undermining conceptions of private schools adding value to student outcomes