Fitting an ex-Gaussian function to examine costs in event-based prospective memory: Evidence for a continuous monitoring profile

Event-based prospective memory (PM) tasks require individuals to remember to perform a deferred action when a target event occurs. PM task requirements can slow ongoing task responses on non-target trials (‘costs’) under conditions where the defining features of targets are non-focal to the ongoing task, which is indicative that individuals have allocated some form of cognitive control process to the PM task. Recent fits of the ex-Gaussian mathematical function to non-target trial response distributions by prior studies have indicated that these control processes are transiently allocated. In the current paper, fits of the ex-Gaussian function to data reported by Loft and Humphreys (2012) demonstrate a shift in the entire response time distribution (μ) and an increase in skew (τ) for a non-focal PM condition required to remember to make a PM response if presented with category exemplars, compared to a control condition. This change in μ is indicative of a more continuous PM monitoring profile than that reported by prior studies. In addition, within–subject variability in μ was reliably correlated with PM accuracy, suggesting that these control processes allocated on a regular basis were functional to PM accuracy. In contrast, when the ongoing task directed attention to the defining features of targets (focal PM) there was a trend level increase in μ, but the within–subject variability in μ was not correlated with PM accuracy, consistent with the theoretical premise that focal PM tasks are not as dependent on cognitive control as non-focal PM tasks.     

Siblings' Direct and Indirect Contributions to Child Development

Abstract— Since the early 1980s, a growing body of research has described the contributions of sibling relationships to child and adolescent development. Interactions with older siblings promote young children's language and cognitive development, their understanding of other people's emotions and perspectives, and, conversely, their development of antisocial behavior. Studies address the ways in which parents' experiences with older children contribute to their rearing of younger children, which in turn contributes to the younger children's development. Finally, by virtue of having a sibling, children may receive differential treatment from their parents. Under some conditions, differential treatment is associated with emotional and behavioral problems in children.     

Orthographic learning in learning to spell: The roles of semantics and type of practice

This study investigated the relevance of type of practice and presence of semantic representation for orthographic learning in learning to spell. A total of 36 students in Grade 2 (mean age = 7 years 10 months) were exposed to 10 novel nonwords, 5 of which were paired with semantic information. Half of the participants practiced reading these new items, whereas the others spelled them. The students were then tested 1 and 7 days later on a dictation task. Results revealed a significant main effect of practice type favoring spelling practice and a main effect of the teaching condition, where taught items paired with semantic information were spelled correctly more often than words presented without semantic support. There was no effect of testing time, with learned words being retained well over the 1-week delay, nor were there any significant interactions. The findings support the contention that spelling offers an excellent milieu for orthographic learning to occur. Furthermore, semantics are proposed as a relevant factor in learning to spell, supporting the view that orthographic learning involves the integration of phonological, orthographic, and semantic representations.     

Contributions of parents and peers to children's moral socialization

This article is concerned with the process of moral development, or specifically, how children acquire a sense of right and wrong from their interactions with two major agents of socialization—parents and peers. The first section of the paper critically examines the literature on parental influences and draws several conclusions about the ways in which parents affect children's moral character. The focus then shifts to a review of the literature on peer group contributions to moral socialization. The paper concludes by examining the literature on cross-pressures, and offering a perspective on the ways in which parental and peer group influences combine to affect children's moral development.     

A Longitudinal Study of Racial Discrimination and Risk for Death Ideation in African American Youth

Although multiple studies have found that African Americans commonly experience racial discrimination, available studies have yet to examine how perceived racism might be related to suicide vulnerability in African American youth. The purpose of this study was to examine a framework for how perceived racial discrimination contributes to symptoms of depression and anxiety as well as subsequent suicide ideation and morbid ideation. Data were obtained from 722 African American youth at mean age 10.56 years (SD = 0.64); a second wave of data was obtained 2 years later. Results revealed both a direct effect and mediated effects of perceived racism on later suicide and morbid ideation. For boys and girls, the effect of perceived racism was mediated by symptoms of depression. However, the association was mediated by anxiety for girls, but not for boys in the current sample. Implications for future research and interventions are discussed.