Reading and Generalist Genes

ABSTRACT— Twin-study research suggests that many (but not all) of the same genes contribute to genetic influence on diverse learning abilities and disabilities, a hypothesis called generalist genes . This generalist genes hypothesis was tested using a set of 10 DNA markers (single nucleotide polymorphisms [SNPs]) found to be associated with early reading ability in a study of 4,258 7-year-old children that screened 100,000 SNPs. Using the same sample, we show that this early reading SNP set also correlates with other aspects of literacy, components of mathematics, and more general cognitive abilities. These results provide support for the generalist genes hypothesis. Although the effect size of the current SNP set is small, such SNP sets could eventually be used to predict genetic risk for learning disabilities as well as to prescribe genetically tailored intervention and prevention programs.     

A Twin Study of Attachment in Preschool Children

The degree to which individual differences in child-parent attachment were mediated by genetic, shared environmental, and nonshared environmental influences was investigated. One hundred and ten preschool-aged twin pairs (N = 220) were assessed in the Strange Situation and coded using conventional four-way classifications and a continuous measure of attachment security. The degree of sibling similarity in attachment was substantial, with an overall concordance rate of 67% at the secure/insecure level. The degree of concordance was equally high in monozygotic and dizygotic twin pairs, 70% and 64%, respectively, suggesting little genetic influence but a moderate degree of discordance. Twin similarity on the continuous measure of attachment security was r(57) = .48 and r(53) = .38 for monozygotic and dizygotic twin pairs, respectively, also consistent with a modest role for genetic influence but a significant effect for shared and nonshared environment. The implications for genetic influences on the environment and for understanding nonshared and shared environmental influences are discussed.     

The ontogeny of the feature-positive effect in young chicks

The wide generality of the feature-positive effect (FPE) has caused speculation that the FPE may represent innate biases in the stimulus control of discriminative responding. There is little experimental evidence to date ragarding this possibility. In the present study, 1- or 4-day-old chicks were trained on a feature-positive (FP) or feature-negative (FN) discrimination with heat reinforcement. After the acquisition phase, these subjects received extinction training followed by a reacquisition phase. The FP performance was superior to the FN performance in both age groups. Extinction resulted in improved discrimination performance in both the FP and FN conditions. Unmasking of FN learning by the extinction treatment suggests that the FPE represents a deficit in performance, rather than an inability to learn the FN task. These data demonstrate that adult-like performance on feature discriminations is evident as early as the first day post-hatch.     

A Critique of the Existing Research into Small Primary Schools

Major studies carried out in the United Kingdom on small primary schools are drawn upon and evaluated. It is argued that research in this area is flawed for the following reasons: there is no agreed definition of a 'small primary school'; investigations have been biased in their favour as a result of problems in research design and the ways in which data have been analysed; and, finally, there has been a neglect of certain key issues, notably those affecting pupil grouping.     

‘That extra sparkle’: students’ experiences of volunteering and the impact on satisfaction and employability in higher education

Research suggests that students entering Higher Education are doing so with greater expectations around their graduate employability. Students’ volunteering activities have been of interest to academics, but the impact of these activities on learning, employability and student satisfaction has been neglected. The current study investigated whether students who volunteered felt it benefited them, whether they felt they were more employable and whether they perceived their course as satisfying in combination with their volunteering. This small-scale qualitative study used a sample of psychology undergraduate students in focus groups (n = 11), and also a number of psychology graduate interviews (n = 6) from one UK university. Thematic analysis produced several key themes including students’ motivations to begin volunteering, which were mainly career-oriented; their motivations to continue, which included rewarding feelings and personal development; the impact of volunteering on their psychology degree, which included situated learning; and their perceptions of their volunteering and its impact on their employability. The findings indicated many reasons for both starting and continuing with volunteering activities with a clear narrative among this sample that volunteering enhanced their employment and postgraduate prospects. Findings are discussed in line with the current context of Higher Education and the implications for both students and Higher Education Institutions.     

Social issues

Rachel Theilheimer teaches early childhood education at Borough of Manhattan Community College in New York City. Emma C. Winger has just completed fifth grade at P.S. 84 in Manhattan.     

Internalizing symptoms and affect of children with emotional and behavioral disorders: A comparative study with an urban African American sample

Self‐reported internalizing symptoms of seriously emotionally disturbed (SED) and regular education students in grades 4–6 were compared using the Internalizing Symptoms Scale for Children. All participants were African American and from an urban public school district in the Southeastern United States. Each of the two study groups consisted of 50 participants (35 boys, 15 girls) who were matched by gender and socioeconomic status. The SED group reported significantly higher levels of internalizing distress than the regular education group. In contrast to previous findings, there was no significant gender difference in self‐reported internalizing symptomatology in the present study. A discriminant function analysis found that the ISSC scores were able to correctly classify 91% of the participants into their respective educational group. Results of this study provide additional evidence of the construct validity of the ISSC, a recently developed and unique self‐report measure. Results are discussed in terms of future research needs and educational/clinical practice with students who have emotional and behavioral disorders. © 1999 John Wiley & Sons, Inc.