Emotional influences on perception and working memory

Although there has been steady progress elucidating the influence of emotion on cognition, it remains unclear precisely when and why emotion impairs or facilitates cognition. The present study investigated the mechanisms involved in the influence of emotion on perception and working memory (WM), using modified 0-back and 2-back tasks, respectively. First, results showed that attentional focus modulated the impact of emotion on perception. Specifically, emotion facilitated perceptual task performance when it was relevant to the task, but it impaired performance when it was irrelevant to the task. The differential behavioural effect of emotion on perception as a function of attentional focus diminished under high WM load. Second, attentional focus did not directly modulate the impact of emotion on WM, but rather its influence depended on the dynamic relationship between internal representations. Specifically, WM performance was worse when the material already being held online and the new input were of matching emotions (e.g. both were negative), compared to when they were not. We propose that the competition between “bottom-up” and “top-down” processing for limited cognitive resources explains the nature of the influence of emotion on both perception and WM.     

Visual feature vs. conjunction searches as a robust manipulation of perceptual load

It has previously been suggested that Lavie’s Perceptual Load Theory can be assessed using feature vs. conjunction search tasks. In this study we manipulated load using a novel paradigm which retains the key features of both classic Load Theory and Feature Integration Theory paradigms. This new paradigm has the advantage of an inbuilt manipulation check which is necessary for future research to translate Load Theory to applied contexts. Across five experiments, we demonstrate the robust nature of this paradigm, which functions with extended display times, large, complex stimuli and when conditions are intermixed on a trial-by-trial basis. We also rule out dilution as a possible cause of these results. The results of all five experiments provide evidence that the feature vs. conjunction search dichotomy is an effective means of imposing low and high perceptual load while controlling for working memory load.     

Individual differences in proactive interference in verbal and visuospatial working memory

Proactive interference (PI) has been shown to affect working memory (WM) span as well as the predictive utility of WM span measures. However, most of the research on PI has been conducted using verbal memory items, and much less is known about the role of PI in the visuospatial domain. In order to further explore this issue, the present study used a within-subjects manipulation of PI that alternated clusters of trials with verbal and visuospatial to-be-remembered items. Although PI was shown to build and release across trials similarly in the two domains, important differences also were observed. The ability of verbal WM to predict performance on a measure of fluid intelligence was significantly affected by the amount of PI present, consistent with past research, but this proved not to be the case for visuospatial WM. Further, individuals’ susceptibility to PI in one domain was relatively independent of their susceptibility in the other domain, suggesting that, contrary to some theories of executive function, individual differences in PI susceptibility may not be domain-general.     

Building seven bridges with young asylum seekers living in exile in the UK (Part 1)

This first paper focuses on the key themes that emerge in work with young asylum seekers and refugees and on our assessment of the needs of individual young asylum seekers, alongside the ways in which we meet the needs of these young people given the holistic, integrated and developmental approach of the Baobab Centre. The fact that psychotherapeutic methods are useful in this context and the need to have flexible approach to psychotherapy in our context are two ideas explored here. This paper will explore how we can slowly build sturdy and protective connections during and after the developmental years following experiences of sequential violence. This means building bridges and links within the internal worlds of these young people between: (1) different aspects of themselves that emerge after violence and loss; (2) themselves and their peers; (3) listening adults; (4) various social influences; (5) cultural influences; (6) their past, present and future lives; (7) links with local, national and international communities all of which are addressed via a ‘Transitional Non-Residential Therapeutic Community’. A case example will illustrate how this work may take place.     

Identity Problems,Ego Strengths,Perceived Stress,and Adjustment During Contextual Changes at University

We present a 2-year time-lag study in which Canadian and Spanish students’ perceptions of stress, identity problems, and psychosocial maturity (ego strengths) were examined in relation to academic, social, and personal-emotional adjustment to university under different conditions of macro-environmental disruption (i.e., academic and economic) and no disruption (stability). In the academic disturbance context, students reported increased stress and the economic disruption situation was associated with greater identity problems. The expected relationships were found among the variables in the study. Students reported greater social maladjustment at university related to economic disruption in comparison with the academic and no disruption contexts. Ego strengths moderated the relationship between perceived stress with academic and social adjustment, respectively. In other words, delayed psychosocial development in conjunction with high perceived stress was associated with deficient academic and social functioning at university. The findings are considered in terms of psychosocial development and the role of proximal and distal perception of stressors in the functional well-being of university students.     

提取引起的遗忘的认知机制

提取引起的遗忘(RIF)指提取某个信息导致对其它相关信息的遗忘,揭示其内在机制是记忆和遗忘领域的一个重要的研究课题。近20年来,各路研究者分别从干扰理论、抑制理论或情境依赖说出发,试图找到引发RIF的唯一的认知机制。基于对有关RIF的认知机制的实证研究的系统分析,可以发现三个理论均有一定的支持证据,因此导致RIF的原因可能包括抑制、干扰和情境的改变等三个方面。今后该领域可结合多种技术手段对这一多元论观点进行直接的检验。     

选择性注意机制在情景线索效应中的作用

情景线索效应是指个体在视觉搜索过程中通过学习重复不变的情景信息提高搜索效率的现象。本文从情景线索效应相关行为特征、眼动特征及大脑神经活动等三个方面探讨了情景线索效应与选择性注意机制的交互作用,发现现有研究中存在着许多互相冲突的现象,增加了理解注意机制的难度。未来研究应结合认知神经科学技术寻找更多的实证数据,探索注意机制对情景线索效应的影响,以进一步完善情景线索效应中的注意机制理论。     

Is Neighborhood Context Differently Related to Externalizing Problems and Delinquency for Girls Compared with Boys?

Although a number of reviews of gender differences in conduct problems and delinquency exist, this paper fills a gap in reviewing neighborhood influences on gender differences in conduct problems and delinquency. These influences are known to be important for boys in childhood and adolescence, but cannot be assumed to be influential in the same manner for girls. The paper starts with several conceptualizations of the association between gender, neighborhoods and juvenile delinquency. It then addresses 4 key questions. Is residing in a disadvantaged neighborhood associated with problem behavior in girls? Are neighborhood effects independent of girls' age? Are girls in disadvantaged neighborhoods exposed to more risk factors than girls in advantaged neighborhoods? Can mediating risk factors explain gender differences in neighborhood effects on children's and adolescents' conduct problems and delinquent behavior? Answers to these questions are important to steer research and elucidate aspects of interventions that can be optimized for girls.     

After-School Youth Development Programs: A Developmental-Ecological Model of Current Research

Although there has been a rapid increase in funding and attention to after-school programs, there is little understanding of how after-school programs impact children's developmental trajectories. The heterogeneity of American children makes it very unlikely that all children need after-school programming or that there is but one brand of after-school programming suitable for all youth. We discuss the numerous developmental and contextual factors that may influence which children benefit most from after-school programs as well as the nature of the after-school programs most beneficial to children's needs. The value of utilizing an ecological and developmental perspective to after-school program evaluation are presented, including the need for improved research designs and more detailed analyses of program type and services as well as a more complete determination of which children benefit the most from after-school participation.     

Transfer of specific contextual functions to novel conditional discriminations

Three adolescents and 4 children participated in studies designed to examine contextually controlled conditional discrimination performance. In Study 1, participants selected Comparison B1 in the presence one stimulus (A1) and Comparison B2 in the presence of another stimulus (A2) using a matching-to-sample procedure. Next, contextual stimuli X1 or X2 were presented, such that in the presence of X1, selection of B1 given A1 and selection of B2 given A2 were reinforced; and in the presence of X2, selection of B2 given A1 and selection of B1 given A2 were reinforced. Then, new conditional discriminations were taught with Stimuli E and F. When the contextual Stimuli X1 and X2 were presented, participants selected the same comparisons as previously established in the EF relations in the presence of X1, but the opposite comparison as in the EF relations in the presence of X2. The results then were replicated with new Stimuli G and H. In Study 2, a new conditional discrimination, CD, was taught. Then, four combinations of two-element samples--C1 and D1, C2 and D2, C1 and D2, or C2 and D1--were presented with X1 and X2 as comparisons. Five of 6 participants selected X1 in the presence of C1 and D1 or C2 and D2, and selected X2 in the presence of C1 and D2 or C2 and D1. Finally, in Study 3, two new discriminations IJ and JK were taught. Then, the transitive IK relations were tested with X1 and X2 as contextual stimuli. The 4 participants selected K1 in the presence of I1 and K2 in the presence of I2 when the contextual stimulus was X1--demonstrating class formation--and selected the other comparisons when the contextual stimulus was X2. These results suggest that the contextual control functions of X1 and X2 transferred even to relations that had not been directly taught. These results extend those demonstrating generalized contextual control by showing transfer of functions of the contextual stimuli in transitivity tests and when the former contextual stimuli were presented as comparisons.