Visual category-selectivity for faces, places and objects emerges along different developmental trajectories

The organization of category-selective regions in ventral visual cortex is well characterized in human adults. We investigated a crucial, previously unaddressed, question about how this organization emerges developmentally. We contrasted the developmental trajectories for face-, object-, and place-selective activation in the ventral visual cortex in children, adolescents, and adults. Although children demonstrated adult-like organization in object- and place-related cortex, as a group they failed to show consistent face-selective activation in classical face regions. The lack of a consistent neural signature for faces was attributable to (1) reduced face-selectivity and extent of activation within the regions that will become the FFA, OFA, and STS in adults, and (2) smaller volumes and considerable variability in the locus of face-selective activation in individual children. In contrast, adolescents showed an adult-like pattern of face-selective activation, although it was more right-lateralized. These findings reveal critical age-related differences in the emergence of category-specific functional organization in the visual cortex and support a model of brain development in which specialization emerges from interactions between experience-dependent learning and the maturing brain.     

Infant brain responses to felt and observed touch of hands and feet: an MEG study

There is growing interest concerning the ways in which the human body, both one's own and that of others, is represented in the developing human brain. In two experiments with 7‐month‐old infants, we employed advances in infant magnetoencephalography (MEG) brain imaging to address novel questions concerning body representations in early development. Experiment 1 evaluated the spatiotemporal organization of infants’ brain responses to being touched. A punctate touch to infants’ hands and feet produced significant activation in the hand and foot areas of contralateral primary somatosensory cortex as well as in other parietal and frontal areas. Experiment 2 explored infant brain responses to visually perceiving another person's hand or foot being touched. Results showed significant activation in early visual regions and also in regions thought to be involved in multisensory body and self–other processing. Furthermore, observed touch of the hand and foot activated the infant's own primary somatosensory cortex, although less consistently than felt touch. These findings shed light on aspects of early social cognition, including action imitation, which may build, at least in part, on infant neural representations that map equivalences between the bodies of self and other.     

自我同一性危机与道德选择多元化

自我是一个复杂的概念 ,自我同一性则是依赖于我们经历过的所有不同的自己的综合 ,是对自身发展的一种强烈的一致性和连续性的主观感觉。自我同一性危机是指自我处于自身的矛盾与冲突中 ,反映了自我在过去和现在、彼地和此地的不连续。在现代社会 ,随着个体道德选择的可能性与主动性的增强 ,自我的完善与否对道德选择相应产生了积极与消极的作用。     

Neural correlates of olfactory learning: Critical role of centrifugal neuromodulation

The mammalian olfactory system is well established for its remarkable capability of undergoing experience-dependent plasticity. Although this process involves changes at multiple stages throughout the central olfactory pathway, even the early stages of processing, such as the olfactory bulb and piriform cortex, can display a high degree of plasticity. As in other sensory systems, this plasticity can be controlled by centrifugal inputs from brain regions known to be involved in attention and learning processes. Specifically, both the bulb and cortex receive heavy inputs from cholinergic, noradrenergic, and serotonergic modulatory systems. These neuromodulators are shown to have profound effects on both odor processing and odor memory by acting on both inhibitory local interneurons and output neurons in both regions.     

Developmental depersonalization: the prefrontal cortex and self-functions in autism

The human self model suggests that the construct of self involves functions such as agency, body-centered spatial perspectivity, and long-term unity. Vogeley, Kurthen, Falkai, and Maieret (1999) suggest that agency is subserved by the prefrontal cortex and other association areas of the cortex, spatial perspectivity by the prefrontal cortex and the parietal lobes, and long-term unity by the prefrontal cortex and the temporal lobes and that all of these functions are impaired in schizophrenia. Exploring the connections between the prefrontal cortex and the construct of self, the present article extends the application of the self model to autism. It suggests that in contrast to schizophrenia, agency and spatial perspectivity are probably preserved in autism, but that, similarly to schizophrenia, long-term unity is probably impaired. This hypothesis is compatible with a model of neuropsychological dysfunction in autism in a neural network including parts of the prefrontal cortex, the temporal lobes, and the cerebellum.     

Nostalgia counteracts self‐discontinuity and restores self‐continuity

Nostalgia is a resource that functions, in part, as a response to self‐discontinuity and a source of self‐continuity. We tested and supported this regulatory role of nostalgia in the tradition of establishing a causal chain. In Study 1, we examined the naturalistic association between events precipitating self‐discontinuity and nostalgia. Self‐discontinuity, especially when stemming from negative life events, was associated with higher proneness to nostalgia. In Study 2, we experimentally induced negative self‐discontinuity (i.e. relatively disruptive), positive self‐discontinuity (i.e. relatively non‐disruptive) or self‐continuity (i.e. neutral non‐disruptiveness) and subsequently assessed state levels of nostalgia. Only negative self‐discontinuity evoked heightened nostalgia. In Study 3, we experimentally induced nostalgia (versus ordinary autobiographical recollection) and assessed self‐continuity. Nostalgia augmented self‐continuity. In Study 4, we experimentally induced nostalgia (versus ordinary autobiographical recollection versus positive autobiographical recollection) and assessed self‐continuity. Again, nostalgia augmented self‐continuity and did so above and beyond positive affect. Here, we ruled out demand characteristics as a rival hypothesis. Taken together, the findings clarify the role of nostalgia in the dynamic between self‐discontinuity and self‐continuity and elucidate the restorative properties of nostalgia for the self‐system. Copyright © 2014 John Wiley & Sons, Ltd.     

Value Crisis: Affective Organization of Personal Meanings

The focus of this article is on the specific affective organization of the self in a value crisis. Whereas the self is conceptualized as an organized system of personal meanings, a value crisis is defined as a disorganization of this system. Personal meanings were investigated using a self-confrontation method that is sensitive to the affective properties of personal meanings and their organization into a composite whole. Three groups of students were compared, one high, one medium, and one low in value crisis. Results indicate that the high crisis group had a lower level of intensity of affect referring to self-enhancement, a lower intensity level of affect referring to contact and union with the other, and a lower level of positive affect in comparison with the other groups. In addition, negative meanings were more generalizing in the self of subjects in crisis, whereas positive meanings were more generalizing in the self system of those not in crisis. Moreover, people in crisis showed more discontinuity between their past and future than those not in crisis. Special emphasis was placed on the specific affective organization of subjects in crisis. Two idiographic case studies were presented to illustrate meaningful exceptions to the rule. It was concluded that value crisis is an “in-between state” involving the risk of disorganization of the self, but at the same time including opportunities for innovative self-development.     

Biological perspectives on the effects of early psychosocial experience

There is much current interest in how adverse experiences early in life might affect certain elements of physiological, behavioral, and psychological functioning across the lifespan. Recent conceptual frameworks for studying the effects of early experience have involved constructs such as experience-expectant, experience-dependent, and experience-adaptive plasticity. The latter construct is related to comparative models of developmental programming which posit the persistence of biological adjustments to the early caregiving environment. We briefly review such models and their translational implications. We then turn to human development and focus on the effects of large changes in children’s life courses as tests of hypotheses related to early experience effects. In particular, the effect of early institutionalization on children’s brain and behavioral development after changes to adoptive families or foster care is used as an example of a research area in which programming hypotheses have been proposed.     

A neuroconstructivist model of past tense development and processing

We present a neural network model of learning and processing the English past tense that is based on the notion that experience-dependent cortical development is a core aspect of cognitive development. During learning the model adds and removes units and connections to develop a task-specific final architecture. The model provides an integrated account of characteristic errors during learning the past tense, adult generalization to pseudoverbs, and dissociations between verbs observed after brain damage in aphasic patients. We put forward a theory of verb inflection in which a functional processing architecture develops through interactions between experience-dependent brain development and the structure of the environment, in this case, the statistical properties of verbs in the language. The outcome of this process is a structured processing system giving rise to graded dissociations between verbs that are easy and verbs that are hard to learn and process. In contrast to dual-mechanism accounts of inflection, we argue that describing dissociations as a dichotomy between regular and irregular verbs is a post hoc abstraction and is not linked to underlying processing mechanisms. We extend current single-mechanism accounts of inflection by highlighting the role of structural adaptation in development and in the formation of the adult processing system. In contrast to some single-mechanism accounts, we argue that the link between irregular inflection and verb semantics is not causal and that existing data can be explained on the basis of phonological representations alone. This work highlights the benefit of taking brain development seriously in theories of cognitive development.     

Surface discontinuity is critical in a moving observer's perception of objects' depth order and relative motion from retinal image motion.

The visual system perceptually decomposes retinal image motion into three basic components that are ecologically significant for the human observer: object depth, object motion, and self motion. Using this conceptual framework, we explored the relationship between them by examining perception of objects' depth order and relative motion during self motion. We found that the visual system obeyed what we call the parallax-sign constraint, but in different ways depending on whether the retinal image motion contained velocity discontinuity or not. When velocity discontinuity existed (e.g. in dynamic occlusion, transparent motion), the subject perceptually interpreted image motion as relative motion between surfaces with stable depth order. When velocity discontinuity did not exist, he/she perceived depth-order reversal but no relative motion. The results suggest that the existence of surface discontinuity or of multiple surfaces indexed by velocity discontinuity inhibits the reversal of global depth order.     

Cognitive developmental biology: history, process and fortune's wheel

Biological contributions to cognitive development continue to be conceived predominantly along deterministic lines, with proponents of different positions arguing about the preponderance of gene-based versus experience-based influences that organize brain circuits irreversibly during prenatal or early postnatal life, and evolutionary influences acting through selection on small numbers of genes. This article discusses evolutionary, mechanistic and probabilistic aspects of developmental processes that cognitive scientists need to better integrate. Developmental processes inseparably fuse experience-dependent and experience-independent components, have important stochastic contributions, and exhibit a greater degree of mechanistic continuity between developing and adult nervous systems than previously thought. Their balanced integration leads to new models for "critical or sensitive" period phenomena and behavioral biases. A general understanding of behavioral development - cognitive developmental biology--will require better coordination between comparative animal and human developmental research programs.     

Relations between dynamics of parent-infant interactions and baseline EEG functional connectivity

Parent-infant interactions are one of the most critical and enduring aspects of infants’ experience. Qualities of parent-infant interactions are related to social-emotional and cognitive developmental outcomes, yet how parent-infant interactions shape the functional organization of the brain is only beginning to be understood. Functional connectivity provides information about how brain regions communicate. Patterns of functional connectivity, thus far understudied in infants, have emerged as markers of abnormalities in the organization of the brain in at-risk infants as well as individuals with neurodevelopmetnal and neurodegenerative disorders. The current study sought to inform our understanding of relations between qualities of parent-infant interactions and functional connectivity. We report relations between responsiveness, reciprocity, and emotional tone and functional connectivity in theta, alpha, beta, and gamma in infants ranging from 6 to 11 month of age (N = 51). Results showed frontal-posterior connectivity in theta was inversely related to all three dimensions of parent-infant interactions. Gamma and alpha connectivity were positively associated with responsiveness and emotional tone, respectively. Results are discussed in the context of the experience-dependent nature of brain development, emphasizing how parent-infant interactions might be leveraged to structure early organization of the brain to foster healthy social-emotional and cognitive developmental outcomes.     

Perceptual organization of two-dimensional patterns

The perceptual organization of image patterns is considered from 2 standpoints. First, a theoretical framework is presented from which computational models of perceptual organization can be constructed and tested. Second, a specific computational model for perceptual organization of line images is described. In this model, input images are first processed by a dense array of neurons that have properties consistent with recent analyses of single-neuron responses in primary visual cortex. Then, complex image structure is discovered by interleaved pattern-matching and grouping processes constrained by a generalized uniqueness principle. A series of 3-pattern grouping experiments was performed to test a restricted version of the model and to estimate critical parameters. Using the estimated parameters, an extended version of the model was tested by generating predictions for a series of "textbook" perceptual organization demonstrations.     

The cortex in multidimensional space: where do cortical areas come from?

The concept of a cortical ‘area’ as a discrete phylogenetic, developmental and computational unit is evaluated. Evidence including the comparative organization of the forebrain in vertebrates, the organization of cortex in different mammals, the scaling of the areas of the isocortex in mammals, and the early molecular differentiation of the cortex all suggest a special status for the primary sensory cortical areas, particularly the visual cortex. Furthermore, the overlapping gradients of early molecular expression and the patterning of cortical structure and connectivity by thalamic input suggest a new view of cortical organization that is different from the traditional view of a developmentally mosaic cortex; this view proposes that distinct cortical areas arise combinatorily from the multiple overlapping processes imposed upon the developing cortex.     

Self-Standards and Self-Discrepancies. A Structural Model of Self-Knowledge

A model of self-knowledge is proposed which summarizes and integrates a few distinctions concerning self-standards and related self-discrepancies. Four types of self-standards are distinguished (i.e. ideal, ought, undesired and forbidden selves) and a hierarchical organization of these standards is postulated. There is a basic contrast between positive and negative standards at the higher level of the hierarchy, whereas Higgins’ distinction between ideals and oughts is found at the lower level. Every self-standard is analyzed in terms of two types of self-discrepancies. Many previous studies explored discrepancies between self-standards and the actual self, i.e. the perceived actualization of standards. The present study proposed that discrepancies between self-standards and the can self are a second type of discrepancy that should be included in structural models of self-knowledge. The can self consists of self-beliefs referring to capabilities and potentials; thus, this additional type of discrepancy reflects the perceived attainability of standards. Consequently, the present study explored a set of eight self-discrepancies, i.e. both the perceived actualization and the attainability of four self-standards. In order to assess the intercorrelations among these eight self-discrepancies, participants (N?=?404) completed a newly developed online measure. CFA modeling confirmed the postulated two-level hierarchy of self-standards. The reasonability of including discrepancies between self-standards and the can self in the structural model of self-knowledge was also confirmed.     

On Intelligence IV: Toward a restoration of general intelligence

The present paper points to the limitations of a focusing on narrow primary factors of intelligence and argues for broad-factor structuring of ability data. Recent studies of such broad attributes would suggest a "rapprochement" between Spearman's general intelligence model and Cattell's theory of Fluid and Crystallized Intelligence. Discussing the neo-Spearman organization of abilities thus proposed, the paper argues, however, that the conceptualization of intelligence suggested by this structural model is more akin to Thomson's "sampling" model than to the "power" model of both Spearman and Cattell. The possible role of these interpretations of ability data in future research on intelligent behavior is discussed.     

Mother—infant interaction structures and presymbolic self‐ and object representations

Using research on the purely social face‐to‐face exchange, we examine patterns of mother—infant interaction and their relevance for the presymbolic origins of self and object representations, focusing on the representation of inter‐relatedness between self and object. Based on a dyadic systems view in which the system is defined by both self‐ and interactive‐regulation processes, we argue that characteristic patterns of self and interactive regulation form early interaction structures, which provide an important basis for emerging self and object representations. What will be represented, presymbolically, is the dynamic interactive process itself, the interplay, as each partner influences the other from moment to moment. This is a dynamic, process view of “interactive”; or “dyadic”; representations. The argument that early interaction structures organize experience is based on a transformational model in which there are continuous transformations and restructurings, where development is in a constant state of active reorganization. To define the capacities on which a presymbolic representational capacity is based, we review the last decade's research on infant perception and memory, which has radically changed our concepts of representation. The interaction structures we describe illustrate the salience of arousal, affect, space, and time in the early organization of experience: (1) state transforming, the expectation that an arousal state can be transformed through the contribution of the partner; (2) facial mirroring, the expectation of matching and being matched in the direction of affective change; (3) disruption and repair, the expectation of degree of ease and rapidity of interactive repair following facial‐visual mismatches; (4) “chase and dodge,”; the expectation of the misregulation and derailment of spatial‐orientation patterns, without repair; and (5) interpersonal timing, the expectation of degree of vocal rhythm matching.     

Fields of Tension in a Boundary-Crossing World: Towards a Democratic Organization of the Self

In their study of the relationship between self and society, scientists have proposed taking society as a metaphor for understanding the dynamics of the self, such as the analogy between the self and the functioning of a totalitarian state or the analogy between the self and the functioning of a bureaucratic organization. In addition to these models, the present article proposes a democratic society as a metaphor for understanding the workings of a dialogical self in a globalizing, boundary-crossing world. The article follows four steps. In the first step the self is depicted as extended to the social and societal environment and made up of fields of tension in which a multiplicity of self-positions are involved in processes of positioning and counter-positioning and in relationships of social power. In the second step, the fertility of the democratic metaphor is demonstrated by referring to theory and research from three identity perspectives: multicultural, multiracial, and transgender. In the fields of tension emerging between the multiplicity of self-positions, new, hybrid, and mixed identities have a chance to emerge as adaptive responses to the limitations of existing societal structures. In the third step, we place the democratic self in a broader societal context by linking three levels of inclusiveness, proposed by Self-Categorization Theory (personal, social, and human) to recent conceptions of a cosmopolitan democracy. In the fourth and final step, a model is presented which allows the formulation of a series of specific research questions for future studies of a democratically organized self.     

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.     

Compartmentalization: A Window on the Defensive Self

Most people hold both positive and negative beliefs about themselves. The way individuals organize, or structure, these beliefs in their self‐concepts can facilitate realistic acceptance and confrontation of negative self‐beliefs (integration), or defensive avoidance and denial of negative self‐beliefs (compartmentalization). This article focuses on the distinction between individuals with a realistic, secure self and a defensive, fragile self. We present evidence that compartmentalization is associated with several indicators of a defensive, fragile self, such as contingent self‐esteem and unstable self‐evaluations. In addition, individuals with this structure are likely to engage in defensive processes that enhance or protect the self. This model of self‐organization can provide a window on the defensive self, allowing researchers to observe the process by which individuals think about and defensively avoid negative self‐beliefs.