Using Predictability for Lexical Segmentation

This study investigates a strategy based on predictability of consecutive sub‐lexical units in learning to segment a continuous speech stream into lexical units using computational modeling and simulations. Lexical segmentation is one of the early challenges during language acquisition, and it has been studied extensively through psycholinguistic experiments as well as computational methods. However, despite strong empirical evidence, the explicit use of predictability of basic sub‐lexical units in models of segmentation is underexplored. This paper presents an incremental computational model of lexical segmentation for exploring the usefulness of predictability for lexical segmentation. We show that the predictability cue is a strong cue for segmentation. Contrary to earlier reports in the literature, the strategy yields state‐of‐the‐art segmentation performance with an incremental computational model that uses only this particular cue in a cognitively plausible setting. The paper also reports an in‐depth analysis of the model, investigating the conditions affecting the usefulness of the strategy.     

工作记忆训练:一个很有价值的研究方向

采用不同的训练方法对不同人群的工作记忆进行训练的研究发现,工作记忆能力可以通过训练提高。通过工作记忆训练,个体的阅读能力、智力水平等得到提升。工作记忆的训练还可以改变人类大脑的活动,而且对于特殊儿童临床症状的缓解有一定的作用。工作记忆训练的研究对原有的认知理论以及相关理论模型提出了挑战,为工作记忆训练运用于教育、临床治疗等领域提供了实证支持,也为理解工作记忆开辟了新的方向。未来的研究应致力于改进训练内容、完善训练形式与指标、探索一套与工作记忆缺陷个体临床治疗相结合的工作记忆训练系统。     

Ethics and Intuitions

For millennia, philosophers have speculated about the origins of ethics. Recent research in evolutionary psychology and the neurosciences has shed light on that question. But this research also has normative significance. A standard way of arguing against a normative ethical theory is to show that in some circumstances the theory leads to judgments that are contrary to our common moral intuitions. If, however, these moral intuitions are the biological residue of our evolutionary history, it is not clear why we should regard them as having any normative force. Research in the neurosciences should therefore lead us to reconsider the role of intuitions in normative ethics.     

EXAMINING THE STRUCTURE AND ROLE OF EMOTION: CONTRIBUTIONS OF NEUROBIOLOGY TO THE STUDY OF EMBODIED RELIGIOUS EXPERIENCE

Abstract. Certain properties of the body and emotions facilitate the transmission of religious knowledge and the development of religious states through particular qualities of perception and memory. The body, which is the ground of religious experience, can be understood as transformative: the characteristic that recalled emotion is “refelt” in the present enables emotion to be cultivated or developed. Emotions and the stimuli that evoke them are necessarily culturally specific, but the automatic nature of this process is universal. Religious traditions have made use of these processes to educate the feeling toward certain qualities and to develop religious experience, through the use of sacred images, ritual posture and gesture, and repetition of ritual acts. Neuroscience contributes to our understanding of the emotional processes that take place when emotions are evoked, refelt, and developed; the neurobiological processing of emotion parallels experience. Keeping experience central makes it possible to bring religion and neuroscience together in a nonreductive examination of spiritual experience.     

Developing a model of the treatment for eating disorder: Using neuroscience research to examine the how rather than the what of change

Treatments for eating disorders, in particular for people with anorexia nervosa, have often been adaptations of therapies designed for other conditions. Indeed, there is a move advocating the use of a transdiagnostic treatment approach in which general module based treatments are mixed together as needed rather than using a specific anorexia nervosa targeted strategy. The outcome of treatment is relatively poor, especially for those who for some reason do not have the benefit of an expert form of early intervention for anorexia nervosa. Technological advances in the neurosciences and genetics have radically altered how eating disorders and in particular anorexia nervosa have been conceptualised. In this paper we describe evidence that suggests that key aspects of the social information processing network both the cognitive and affective elements may be anomalous in people with anorexia nervosa. This has implications for models of treatment which can be tailored more directly to these causal and or maintaining factors. We describe the Maudsley method of working with adults with anorexia nervosa which has integrated these elements. This treatment approach includes working with the individual to develop a more flexible and holistic cognitive style with greater emotional intelligence. This is supplemented with work with the families to interrupt interactions that either accommodate to or aggravate the symptoms. Thus we are now in the position to understand and work to change how people with anorexia nervosa think and behave rather than focusing on what people think and say they do. Our prediction is that treatments that focus more directly on aetiology such as the intrapersonal and interpersonal maintaining factors will improve outcome.     

Doing cognitive neuroscience: a third way

The “top-down” and “bottom-up” approaches have been thought to exhaust the possibilities for doing cognitive neuroscience. We argue that neither approach is likely to succeed in providing a theory that enables us to understand how cognition is achieved in biological creatures like ourselves. We consider a promising third way of doing cognitive neuroscience, what might be called the “neural dynamic systems” approach, that construes cognitive neuroscience as an autonomous explanatory endeavor, aiming to characterize in its own terms the states and processes responsible for brain-based cognition. We sketch the basic motivation for the approach, describe a particular version of the approach, so-called ‘Dynamic Causal Modeling’ (DCM), and consider a concrete example of DCM. This third way, we argue, has the potential to avoid the problems that afflict the other two approaches.     

The Cognitive Neuroscience of Aging and Culture

ABSTRACT— Research into the cognitive neuroscience of aging has revealed exciting and unexpected changes to the brain over the lifespan. However, studies have mostly been conducted on Western populations, raising doubts about the universality of age-related changes. Cross-cultural investigation of aging provides a window into the stability of changes with age due to neurobiology, as well as into the flexibility of aging due to life experiences that impact cognition. Behavioral findings suggest that different cultures process distinct aspects of information and employ diverse information-processing strategies. The study of aging allows us to identify those age-related neural changes that persist across cultures as well as the changes that are driven by culture-specific life experiences.     

The Social Nature of Perception and Action

ABSTRACT— Humans engage in a wide range of social activities. Previous research has focused on the role of higher cognitive functions, such as mentalizing (the ability to infer others' mental states) and language processing, in social exchange. This article reviews recent studies on action perception and joint action suggesting that basic perception–action links are crucial for many social interactions. Mapping perceived actions to one's own action repertoire enables direct understanding of others' actions and supports action identification. Joint action relies on shared action representations and involves modeling of others' performance in relation to one's own. Taking the social nature of perception and action seriously not only contributes to the understanding of dedicated social processes but has the potential to create a new perspective on the individual mind and brain.