Conceptualizing the role of early experience: Lessons from the Minnesota longitudinal study

We draw upon data from a prospective, longitudinal study to evaluate the role of typically occurring variations in early experience on development from birth to adulthood. Such an evaluation is complex for both methodological and conceptual reasons. Methodological issues include the need to control for both later experience and potentially confounding third variables, such as IQ or temperament. Conceptual complexity derives from the fact that the effects of early experience can be both direct and indirect, can interact with other factors, and because whether an effect is found depends on what early experience and what outcomes are assessed. Even direct effects are probabilistic and are more in evidence with cumulative than with single measures. Often early experience has its effect indirectly by initiating a chain of events, by altering the organism in some way, and/or by promoting the impact of later experience. We provide examples where early experience is moderated and mediated by other factors and where it shows latent effects following developmental change. We illustrate developmental processes through which early experience has its effect and conclude that despite the complexity of development variations in early experience retain a vital place in the study of development.     

Developing an understanding of the literature relating to the moral development of people with intellectual disabilities

Recent reviews of moral development theory (Gibbs, Basinger, Grime, & Snarey, 2007) demonstrate that revisionist theoretical perspectives have cross cultural validity, but moral development in relation to people with intellectual disabilities (IDs) has not been considered within this literature. A structured review of the published literature relating to children, adolescents and adults with IDs, and moral development was carried out. Twenty studies meeting the inclusion criteria were found. The review indicated that people with IDs may not progress through the developmental stages of moral reasoning as quickly as typically developing peers, or reach the more advanced stages. This difference from non-disabled peers tends to disappear if groups are matched on some measure of cognitive ability. However, the studies are fraught with methodological problems and there is a need for further research, given the theoretical developments within the area of moral development, including the evidence of a relationship between moral development and anti-social behaviour amongst typically developing children and adolescents.     

Neurocognitive correlates of white matter quality in adolescent substance users

Background

Progressive myelination during adolescence implicates an increased vulnerability to neurotoxic substances and enduring neurocognitive consequences. This study examined the cognitive manifestations of altered white matter microstructure in chronic marijuana and alcohol-using (MJ + ALC) adolescents.

Methods

Thirty-six MJ + ALC adolescents (ages 16–19) and 36 demographically similar controls were evaluated with diffusion tensor imaging (Bava et al., 2009) and neurocognitive tests. Regions of group difference in fractional anisotropy (FA) and mean diffusivity (MD) were analyzed in relation to cognitive performance.

Results

In users, lower FA in temporal areas related to poorer performance on attention, working memory, and speeded processing tasks. Among regions where users had higher FA than controls, occipital FA was positively associated with working memory and complex visuomotor sequencing, whereas FA in anterior regions was negatively associated with verbal memory performance.

Conclusions

Findings suggest differential influences of white matter development on cognition in MJ + ALC using adolescents than in non-using peers. Neuroadaptation may reflect additive and subtractive responses to substance use that are complicated by competing maturational processes.     

情绪的神经心理学理论概述

本文主要论述了情绪神经心理学的有关理论。过去,人们认为情绪和认知分别由皮层下和皮层结构所控制,认知系统控制着情绪系统。现在,人们认为认知和情绪两个机能系统是相互联系的。情绪系统能快速、自动地加工有限数量的信息,认知系统则能有意识和有控制地分析信息。情绪是一个非同质的、多成分的、有等级组织的适应系统。大脑左、右半球在情绪表征和控制中具有不对称性,右半球主要控制自动的、自发的情绪,而左半球在概念水平上调节控制情绪。     

Y-Balance Test Performance and Leg Muscle Activations of Children with Developmental Coordination Disorder

This study compared Lower Quarter Y-Balance Test (YBT-LQ) performance and leg muscle kinetics between children with and without developmental coordination disorder (DCD), and investigated the association between YBT-LQ performance and muscle kinetics in children with DCD. Forty-eight children with DCD and 51 children without DCD participated in the study. Leg muscle kinetics were measured using surface electromyography when performing YBT-LQ. Children with DCD exhibited an overall lower YBT-LQ scores than controls. They had a lower peak gastrocnemius medialis activation for YBT-LQ posteromedial direction and shorter duration for the muscle to reach peak torque for YBT-LQ anterior direction. No relationship was found between YBT-LQ performance and leg muscle activations in children with DCD. Children with DCD exhibited a less competent YBT-LQ performance with atypical neuromuscular control.     

The p factor in children: Relationships with executive functions and effortful control

Lower levels of self-regulation have been implicated in multiple psychological disorders. Despite conceptual overlap (broadly reflecting self-regulatory functions), executive functions (EF) and effortful control (EC) are rarely jointly studied in relation to broadband psychopathology. The present study investigated associations of correlated factors (internalizing-externalizing) and bifactor psychopathology models with EF and EC in a large (N = 895) childhood community sample (M_age = 11.54, SD_age = 2.25). Associations between both self-regulation constructs (EF and EC) with psychopathology were largely accounted for via a general psychopathology factor. However, EC evidenced stronger associations, questioning the utility of task-based EF measures to inform self-regulatory psychopathology.     

空格减少汉语发展性阅读障碍儿童的视觉拥挤效应：来自眼动的证据

使用眼动仪记录汉语发展性阅读障碍儿童、正常年龄匹配和能力匹配儿童阅读插入空格文本时的眼动,考察在字、词以及非词间插入空格呈现文本对汉语发展性阅读障碍儿童阅读加工过程的影响。结果发现,阅读障碍儿童在字间空格条件下平均注视时间减少的程度大于正常儿童,注视次数在字间和词间空格条件下未见显著增加,能力匹配儿童的注视次数在这两种空格条件下却显著增加。结果说明,在字间和词间插入空格能够减少儿童的平均阅读时间,且字间空格文本呈现显著地提高了其阅读效率,说明空格对汉语阅读障碍儿童具有促进作用,这种促进主要是由于空格减少了其视觉拥挤效应所致。     

What does rapid automatized naming measure? A new RAN task compared to naming and lexical decision

The present research investigated the relationship between Rapid Automatized Naming (RAN) performance, letter-string reading measures of sight vocabulary (SV) and phonetic decoding (PD), and lexical decision. Criterion-based naming rates were obtained from three types of RAN tasks: digits, letters, and letter sounds. Latency measures were obtained from the naming of regular words, exception words, nonwords and pseudohomophones; as well as button press and verbal lexical decision tasks. Regression analyses supported the hypotheses that RAN-Letters latency reflects SV processing in that its variance is uniquely accounted for by exception word naming latency and button press lexical decision latency, and that RAN-Letter Sounds latency best reflects PD processing in that its variance is uniquely accounted for by pseudohomophone and nonword naming latency. Findings are discussed in light of what the RAN tasks are measuring, implications involving visual word recognition models of reading, and the utility of the new RAN-Letter Sounds task with respect to diagnostic and remediation applications.     

A critical review of the “enculturation hypothesis”: the effects of human rearing on great ape social cognition

Numerous investigators have argued that early ontogenetic immersion in sociocultural environments facilitates cognitive developmental change in human-reared great apes more characteristic of Homo sapiens than of their own species. Such revamping of core, species-typical psychological systems might be manifest, according to this argument, in the emergence of mental representational competencies, a set of social cognitive skills theoretically consigned to humans alone. Human-reared great apes capacity to engage in true imitation, in which both the means and ends of demonstrated actions are reproduced with fairly high rates of fidelity, and laboratory great apes failure to do so, has frequently been interpreted as reflecting an emergent understanding of intentionality in the former. Although this epigenetic model of the effects of enculturation on social cognitive systems may be well-founded and theoretically justified in the biological literature, alternative models stressing behavioral as opposed to representational change have been largely overlooked. Here I review some of the controversy surrounding enculturation in great apes, and present an alternative nonmentalistic version of the enculturation hypothesis that can also account for enhanced imitative performance on object-oriented problem-solving tasks in human-reared animals.