海马结构、前额皮层或尾-壳核损毁对大鼠空间认知能力的影响

本研究的目的是探讨海马结构(HF)、前额皮层(PFC)和尾-壳核(CP)在大鼠空间认知加工中的作用。实验观察到HP或PFC损毁大鼠Morris迷宫学习或记忆作业成绩显著低于CP损毁组和控制组(CG);HF损毁大鼠主要采用与其它各组不同的“非图类”搜索策略。搜索策略的差异提示:HF和PFC在大鼠图认知加工系统中处于不同的功能层次,HF起相对重要的作用。CP几乎不影响大鼠空间认知能力,表现出哺乳类与鸟类同源结构的功能分化倾向。     

Relevant identity

We begin to fill a lacuna in the relevance logic enterprise by providing a foundational analysis of identity in relevance logic. We consider rival interpretations of identity in this context, settling on the relevant indiscernibility interpretation, an interpretation related to Dunn's relevant predication project. We propose a general test for the stability of an axiomatisation of identity, relative to this interpretation, and we put various axiomatisations to this test. We fill our discussion out with both formal and philosophical remarks on identity in relevance logic.     

Book Reviews

Books reviewed: Rose McDermott, Risk-Taking in International Politics Yaacov Y. I. Vertzberger, Risk Taking and Decisionmaking: Foreign Military Intervention Decisions Meredith W. Watts, Xenophobia in United Germany: Generations, Modernization, and Ideology Tom R. Tyler, Robert J. Boeckman, Heather J. Smith, and Yuen J. Huo, Social Justice in a Diverse Society Fritz Redlich, Hitler: Diagnosis of a Destructive Prophet Alexander L. George and Juliette L. George (eds.), Presidential Personality and Performance Norman N. Nie, Jane Junn, and Kenneth Stehlik-Barry, Education and Democratic Citizenship in America Arthur Lupia and Mathew D. McCubbins, The Democratic Dilemma: Can Citizens Learn What They Need to Know?     

Overshadowing the Reminiscence Bump: Memories of a Struggle for Independence

We describe a study in which young and older groups of Bangladeshi participants recalled and dated autobiographical memories from across the lifespan. Memories were subsequently plotted in terms of the age of participants at time of encoding. As expected the reminiscence bump, preferential recall of memories from the period of 10 to 30 years of age, was observed. This was very marked in the younger group and but less so in the older group who also showed a second bump in the period 35 to 55 years of age. This second bump corresponded to the period of national conflict between Pakistan and the Bengalee people that resulted in the formation of an independent Bangladesh. It is proposed that both the reminiscence bump and later periods of unexpected rises in recall can be accounted for by the raised accessibility of sets of memories and this in turn is a product of the privileged encoding of highly self-relevant experiences.     

Gerotranscendence and the Functions of Reminiscence

In the present investigation, different functions of reminiscence have been empirically studied in relation to the developmental changes described in the theory of gerotranscendence, a theory dealing with human development towards maturity and wisdom. The phenomenon of gerotranscendence and the functions of reminiscence are, according to our analyses, intertwined. Since gerotranscendence is largely about the change and reconstruction of identity and personal frames of reference, this also means that the common continuity-oriented theoretical perspective on reminiscence has to be questioned. Reminiscence can have functions other than that of stabilizing an already developed identity. It can just as well play an instrumental role in developmental change and reconstruction of the identity and in our perception of the world.     

Wave of Memory

This article explores theories of selfhood by juxtaposing them against an individual's lived experience. As Ronald Manheimer reflects upon his friendship with Hildegard, a student from one of the classes that he taught at a senior center in Olympia, Washington, he compares this experience with that described by various theories of selfhood. Building on the linguistic self, the narrative self, and the relational self, Manheimer posits a self that exists through time within a network of relationships, not a fixed determined self, but a dynamic self, subject to revision and reimagining.     

Conditions for Piagetian Stage IV search errors in a task using transparent occluders

In a Piagetian Stage IV search task in which the object was in plain view under transparent covers, Butterworth (1977) obtained errors from nearly half the infants but noted few errors when the object was uncovered. This study investigates the possibility that errors arise in the former case because novel transparent covers present a particular distraction. Butterworth's results with transparent covers were replicated under his conditions of administration, but virtually no errors were obtained when infants were familiarized with the covers prior to testing. From this and other results it is suggested that errors in search for a visible object only occur when the infant's attention is drawn by other features of the array.     

FANTASY WORLDS AND SELF-MAINTENANCE IN CONTEMPORARY AMERICAN LIFE

Abstract. Because actual social experience is often damaging to conceptions of self, individuals in all societies engage in identity work beyond ordinary social interaction. For people in religious groups, identity work may involve the subjective experience of interactions with spirit beings as in altered states of consciousness such as dreams, reverie, or trance. In memories, anticipations, and fantasies, secular Americans, too, may experience gratifying imaginary social interactions when they gain recognition and acclaim from imagined others. Unlike spirit relations these fantasies are not culturally defined as "real." However, like spirit relations, they may have very real effects on self-maintenance.     

The effects of feedback and consequences on transitional cursive letter formation

Twelve first-grade students were employed to analyze the effects of (1) Verbal and Visual Feedback, (2) Verbal and Visual Feedback plus immediate rewriting of trained letters with one or more incorrect letter strokes, and (3) Potential Reinforcement on cursive letter strokes. Students practised both a set of trained and a set of untrained letters during each session. Feedback and reinforcement was administered only for trained letter strokes. The percentage of correct trained letter strokes increased during all conditions. Performance on the untrained but practiced and trained letter strokes followed the same general trend in response pattern. No consistent pattern of generalization was demonstrated with untrained and unpracticed letter strokes.     

Infants' categorization of novel objects with more or less obvious features

In five experiments, 14- to 15-month-old infants' categorization of objects on the basis of more or less obvious features was investigated. Using an object examining paradigm, a total of 200 infants were familiarized with novel objects that shared either more obvious features (i.e., easily visible) or less obvious features (i.e., accessible by lifting a flap), followed by an in-category object and an out-of-category object. When only perceptual information was available, infants formed a category on the basis of the more obvious features but not on the basis of the less obvious features (Experiments 1 and 3). When infants were provided with animacy cues and/or object names, they formed categories on the basis of either more or less obvious features (Experiments 2, 4, and 5). The results of these studies delineate the role of animacy cues and object names in establishing categories on the basis of less obvious features.