Why specific developmental disorders are not specific: On-line and developmental effects in autism and dyslexia

In this paper we will suggest that impairments in domain-specific functions may have wide-ranging developmental effects which mimic domain-general impairments. This may explain why ‘pure’ cases of developmental disorders are rare. The understanding of autism and dyslexia has been advanced by theories postulating failure of a specific mechanism against a background of unimpaired general processing. Impairment in the mechanisms underlying ‘theory of mind’ in autism, and ‘phonology’ in dyslexia, predict and explain the pattern of poor and good performance on a range of experimental and real-life tasks. However, existing accounts deal largely with the on-line effects of modular deficits, and can be criticised as not truly developmental. Here we attempt to trace developmental or down-stream effects of specific impairments in mentalising and phonological processing. We argue that these modules act as vital gatekeepers in development. Important in this process is the interaction of cognition with socio-cultural environment, an effect well-illustrated by cross-language differences in dyslexia. We claim that consideration of these developmental effects makes clear why postulating specific impairments may be sufficient for explaining more general deficits.     

Neurocognitive elements of antisocial behavior: Relevance of an orbitofrontal cortex account

This paper reviews the role of orbitofrontal cortex (OFC) lesions in antisocial behaviors and the adequacy of a strict OFC account of antisocial disorders where there is no evidence of lesion. Neurocognitive accounts of antisocial behaviors are extended beyond the OFC. Several methodological shortcomings specific to this neuroscience approach to antisocial behavior are identified. A developmental approach is advocated to chart the developmental sequences of impaired brain development and of the various comorbid states typically seen in antisocial disorders.     

Are developmental disorders like cases of adult brain damage? Implications from connectionist modelling

It is often assumed that similar domain-specific behavioural impairments found in cases of adult brain damage and developmental disorders correspond to similar underlying causes, and can serve as convergent evidence for the modular structure of the normal adult cognitive system. We argue that this correspondence is contingent on an unsupported assumption that atypical development can produce selective deficits while the rest of the system develops normally (Residual Normality), and that this assumption tends to bias data collection in the field. Based on a review of connectionist models of acquired and developmental disorders in the domains of reading and past tense, as well as on new simulations, we explore the computational viability of Residual Normality and the potential role of development in producing behavioural deficits. Simulations demonstrate that damage to a developmental model can produce very different effects depending on whether it occurs prior to or following the training process. Because developmental disorders typically involve damage prior to learning, we conclude that the developmental process is a key component of the explanation of endstate impairments in such disorders. Further simulations demonstrate that in simple connectionist learning systems, the assumption of Residual Normality is undermined by processes of compensation or alteration elsewhere in the system. We outline the precise computational conditions required for Residual Normality to hold in development, and suggest that in many cases it is an unlikely hypothesis. We conclude that in developmental disorders, inferences from behavioural deficits to underlying structure crucially depend on developmental conditions, and that the process of ontogenetic development cannot be ignored in constructing models of developmental disorders.     

认知神经心理学简介

认知神经心理学是认知心理学的一个分支。它的目的是探讨当人们执行认知活动的时候,心理信息加工过程是怎样的,所采用的手段是研究这些认知功能受损的病人。它与认知神经科学的不同在于：认知神经心理学关注的是心理（mind）,而认知神经科学关注的是大脑（特别是关注与认知有关的大脑机制）。研究认知神经心理学的方法也可以用于研究发展性认知障碍,如阅读障碍,或者特殊的语言损伤,这就是发展性认知神经心理学。这些方法还可以用于高级认知发面的研究,如信念形成和心理理论。这些高级认知方面的障碍是精神病学的范畴,因此这类研究错觉、幻想或虚构等的认知神经心理学叫做认知神经精神病学。认知神经心理学的典型特征有：1）研究症状,而不是并发症;2）采用个案研究,而不是群体研究;3）主要数据来源是症状间的双分离;4）致力于模块化认知模型的建立。     

Deviations in the emergence of representations: a neuroconstructivist framework for analysing developmental disorders

A common way of studying developmental disorders is to adopt a static neuropsychological deficit approach, in which the brain is characterized in terms of a normal brain with some parts or ‘modules’ impaired. In this paper we outline a neuroconstructivist approach in which developmental disorders are viewed as alternative developmental trajectories in the emergence of representations within neural networks. As a concrete instantiation of the assumptions underlying this general approach, we present a number of simulations in an artificial neural network model. The representations that emerge under different architectural, input and developmental timing conditions are then analysed within a multi‐dimensional state space. We explore alternative developmental trajectories in these simulations, demonstrating how initial differences in the same parameter can lead to very different outcomes, and conversely how different starting states can sometimes result in similar end states (phenotypes). We conclude that the assumptions of the neuroconstructivist approach are likely to be more appropriate for analysing developmental deviations in complex dynamic neural networks, such as the human brain.     

社会认知职业理论:研究进展及应用

社会认知职业理论将心理、社会、经济等影响因素整合起来,动态地揭示人们如何形成职业兴趣,做出职业选择并取得不同的绩效。基于该理论,针对不同的人群已有大量的研究。在此基础上,该理论还对职业咨询提供了多种发展性、干预性的及补救性的策略。     

DIAGNOSTIC PSYCHOLOGICAL TESTING FOR READING/LEARNING DISORDERS IN PRESCHOOL CHILDREN

ABSTRACT

The assessment of preschool children who are at risk for having specific language/learning disorders when they enter school is a complex undertaking which must involve examining a wide variety of developmental processes. In addition to a thorough medical, developmental and academic history, the clinician should obtain data regarding perceptual‐motor functioning, language and cognitive development, nominal recall, cerebral dominance and directionality, sequential memory, and the integrity of basic sensory modalities. Although the diagnosis of potential learning disorders in preschool children 1s difficult because of the variability in developmental rate of young children, a systematic evaluation of the developmental functions which are classically associated with learning disabilities allows the psychologist to make a responsible and generally accurate statement of the child's current functioning and future potential     

A Blueprint for Social Cognitive Development

ABSTRACT— The field of social cognitive development (SCD) has historically failed to emerge as a dominant approach in developmental psychology. We take this opportunity to articulate the assumptions, goals, and contributions of SCD with the aim of invigorating research from this perspective. We begin by describing the current landscape of social and cognitive development, suggesting what they have and have not given us. We then outline major goals of the social cognitive developmental approach and walk through examples of successful SCD research. Finally, we examine the unique potential of the social cognitive approach to cross-fertilize social and cognitive development (as well as related fields such as social psychology and neuroscience) and to answer new questions about development.     

Developmental cognitive neuroscience: progress and potential

Developmental cognitive neuroscience is an evolving field that investigates the relations between neural and cognitive development. Lying at the intersection of diverse disciplines, work in this area promises to shed light on classic developmental questions, mechanisms subserving developmental change, diagnosis and treatment of developmental disorders, and cognitive and neuroscientific topics traditionally considered outside the domain of development. Fundamental questions include: What are the interrelations between developmental changes in the brain (e.g. in connectivity, chemistry, morphology) and developmental changes in children's behavior and cognitive abilities (e.g. representational complexity, ability to sustain selective attention, speed of processing)? Why, and how, is learning enhanced during certain periods in development? How is our knowledge organized, and how does this change with development? We discuss preliminary investigations of such questions and directions for future work.     

Modeling developmental cognitive neuroscience

In the past few years connectionist models have greatly contributed to formulating theories of cognitive development. Some of these models follow the approach of developmental cognitive neuroscience in exploring interactions between brain development and cognitive development by integrating structural change into learning. We describe two classes of these models. The first focuses on experience-dependent structural elaboration within a brain region by adding or deleting units and connections during learning. The second models the gradual integration of different brain areas based on combinations of experience-dependent and maturational factors. These models provide new theories of the mechanisms of cognitive change in various domains and they offer an integrated framework to study normal and abnormal development, and normal and impaired adult processing.     

The development of calendrical skills

Calendrical calculation is the unusual ability to name days of the week for dates in the past and sometimes the future. Previous investigations of this skill have concerned savants, people with pervasive developmental disorders or general intellectual impairment. This research has yielded a hypothesis about how calendrical skills develop but no direct evidence. This study attempts to learn about the development of savant skills by investigating the development of calendrical skills in two boys (aged 5 and 6 years) along with more general cognitive and social assessments. Consistent with the hypothesis, they initially demonstrated knowledge of regularities but limited range and accuracy in answering date questions and they were slower than many adult savants. At follow up, neither had improved their calendrical skills and they were less willing to answer date questions. Possibly this is because, unlike savants, they had developed interests more commonly shared by their peers and they now received praise for more conventional achievements.     

Prejudice,categorization and particularization: From a perceptual to a rhetorical approach

This paper seeks to offer an alternative approach to the study of prejudice than that based upon the notion of categorization which is currently influential in cognitive social psychology. It is argued that the categorization approach assumes the inevitability of prejudice and ignores the issue of tolerance. The assumptions of the categorization approach are criticized, and it is suggested that, by focusing on categorization as a cognitive process, it has overlooked an opposing process—that of particularization. The result has been a rather mechanical and bureaucratic model of cognition. A less mechanical view is possible if the relations between the two processes of categorization and particularization are considered from a rhetorical perspective, which examines the argumentative nature of thought. For theoretical and empirical reasons, this perspective does not equate prejudiced thinking with rigid categorization; instead a rhetorical approach permits a distinction between prejudice and tolerance on the basis of content, rather than form, and thereby avoids assuming the inevitability of prejudice.     

Cognitive architecture and descent with modification

Against a background of recent progress in developmental neuroscience, some of which has been taken as challenging to the modularity hypothesis of , this article contrasts two competing conceptions of modularity: sui generis modularity, according to which modules are treated as independent neurocognitive entities that owe nothing to one another, and descent-with-modification modularity, according to which current cognitive modules are understood to be shaped by evolutionary changes from ancestral cognitive modules. I argue that sui generis modularity is incompatible with a range of data, from the co-occurrence of deficits to the patterns of activation in neuroimaging studies, but that same range of data is compatible with descent-with-modification modularity. Furthermore, I argue that the latter conception of modularity may have important implications for the practice and conception of fields such as developmental disorders and linguistics.     

Is atypical development necessarily a window on the normal mind/brain?: The case of Williams syndrome

In this paper I challenge the accepted view that atypical development necessarily serves as a window on the normal mind/brain. Such a stance ignores the dynamics of development. Rather I submit that the development of many atypical groups cannot be thought of in terms of a normal brain with whole cortical circuits intact or impaired, as in the adult neuropsychological model, because the brains of genetically impaired children develop differently at multiple levels – brain anatomy, brain chemistry, temporal patterns of brain activity – throughout embryogenesis and postnatal development. This is briefly illustrated with reference to studies of Williams syndrome. It is argued that very subtle differences in developmental timing, neuronal density, neuronal efficiency, firing thresholds, transmitter types, synaptogenesis and pruning, may have crucial but very indirect effects on the resulting phenotypes, affecting certain systems more than others. Subtle differences at a much lower level than cognitive modules are likely to explain the range of phenotypical outcomes that humans can display.     

Attention trajectories, mechanisms and outcomes: at the interface between developing cognition and environment

Attentional processes play a crucial role in prioritizing information for further processing and they therefore sit at the interface between internal goals and the challenges presented by the environment. How does attentional control interact with the changing constraints imposed by the developing cognitive system? Emerging work in this area has employed a range of complementary techniques, from increasingly refined neurocognitive measures in typically developing individuals, to the investigation of risk or protective factors influencing attention trajectories in developmental disorders. A growing corpus of data suggests that, while attentional biases for specific input characteristics (e.g. suddenly appearing stimuli, emotional expressions) are in place from infancy, it is the interplay between these predispositions, genetic and environmental factors that drives attention development over time. With the advent of multidisciplinary approaches to the developmental cognitive neuroscience of attention, unravelling these complex dynamics from infancy and their outcome on learning is increasingly within reach.     

Diversity and unity of modularity

Since the publication of Fodor's (1983) The Modularity of Mind, there have been quite a few discussions of cognitive modularity among cognitive scientists. Generally, in those discussions, modularity means a property of specialized cognitive processes or a domain-specific body of information. In actuality, scholars understand modularity in many different ways. Different characterizations of modularity and modules were proposed and discussed, but they created misunderstanding and confusion. In this article, I classified and analyzed different approaches to modularity and argued for the unity of modularity. Modularity is a multidimensional property consisting of features from several dimensions specifying different aspects of cognition. Among those, there are core features of modularity, and these core features form a cross-dimensional unity. Despite the diverse and liberal characterizations, modularity contributes to cognitive science because of the unity of the core features.     

A developmental psychopathology model of overgeneral autobiographical memory

Overgeneral memory (OGM) is a phenomenon that refers to difficulty retrieving specific autobiographical memories. The tendency to be overgeneral in autobiographical memory recall has been commonly observed among individuals with emotional disorders compared to those without emotional disorders. Despite significant advances in identifying mechanisms that underlie OGM, etiological models are not particularly developmental in nature and, instead, are focused on identifying isolated cognitive presentations of individuals with high OGM. The aim of the current paper is to utilize a developmental psychopathology framework, which emphasizes the interface between typical and atypical development, and risk and protective factors at multiple ecological levels, to propose a comprehensive model of OGM development. Specifically, (1) the progression of current etiological models of OGM is reviewed; (2) developmental theory and research on autobiographical memory that have relevance for OGM are discussed; and (3) an integrative model of OGM that includes processes at psychological, biological, social, and cultural levels is proposed. Directions for future research are formulated and treatment implications derived from this perspective are addressed.     

The development of general competence and domain-specific competencies

The development of competence was studied in a longitudinal sample of 98 children, with measurement points when the children were 7, 10, and 12 years old. Competence was defined in terms of adequate adaptation to developmental tasks, both on a general and on a domain-specijic level. The general form of competence was measured by ego-resiliency, reflecting fexibility and ability to solve developmental problems Domain-specific competencies were measured by school achievement and social preference. The results showed that ego-resiliency was related to the two domain-specific competencies, although the hypothesized causal direction from general competence to specific competencies was not supported. Both domain-specific competencies were found to have a feedback effect on ego-resiliency. This feedback effect was stronger for social preference. These results suggest a transactional relationship between general and domain-specific competencies, and point to the importance of domain-specific competencies (especially social preference by the peer group) in the development of general competence in the child.     

How to Identify a Domain-General Learning Mechanism When You See One

A longstanding and fundamental debate in developmental science is whether knowledge is acquired through domain-specific or domain-general mechanisms. To date, there exists no tool to determine whether experimental data support one theoretical approach or the other. In this article, we argue that the U- and N-shaped curves found in a number of studies across a range of developmental areas are a product of domain-general learning. This pattern arises through a combination of improving cognitive capacities, which allow for different levels of processing, and emergent constraints on learning. We propose that developmental scientists' knowledge of the meaning of this pattern can aid the theoretical interpretation of data as well as experimental design to incorporate a sufficiently inclusive range of ages.