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161.
The representational capacity and inherent function of any neuron, neuronal population or cortical area in the brain is dynamic and context-sensitive. Functional integration, or interactions among brain systems, that employ driving (bottom up) and backward (top-down) connections, mediate this adaptive and contextual specialisation. A critical consequence is that neuronal responses, in any given cortical area, can represent different things at different times. This can have fundamental implications for the design of brain imaging experiments and the interpretation of their results. Our arguments are developed under generative models of brain function, where higher-level systems provide a prediction of the inputs to lower-level regions. Conflict between the two is resolved by changes in the higher-level representations, which are driven by the ensuing error in lower regions, until the mismatch is "cancelled". From this perspective the specialisation of any region is determined both by bottom-up driving inputs and by top-down predictions. Specialisation is therefore not an intrinsic property of any region but depends on both forward and backward connections with other areas. Because the latter have access to the context in which the inputs are generated they are in a position to modulate the selectivity or specialisation of lower areas. The implications for classical models (e.g., classical receptive fields in electrophysiology, classical specialisation in neuroimaging and connectionism in cognitive models) are severe and suggest these models may provide incomplete accounts of real brain architectures. Here we focus on the implications for cognitive neuroscience in the context of neuroimaging. 相似文献
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163.
Jakob Hohwy 《Synthese》2007,159(3):315-328
Different cognitive functions recruit a number of different, often overlapping, areas of the brain. Theories in cognitive
and computational neuroscience are beginning to take this kind of functional integration into account. The contributions to
this special issue consider what functional integration tells us about various aspects of the mind such as perception, language,
volition, agency, and reward. Here, I consider how and why functional integration may matter for the mind; I discuss a general
theoretical framework, based on generative models, that may unify many of the debates surrounding functional integration and
the mind; and I briefly introduce each of the contributions. 相似文献
164.
The ubiquitous left-hemisphere advantage in visual word processing can be accounted for in different ways. Competing theories have been tested recently using cAsE-aLtErNaTiNg words to investigate boundary conditions for the typical effect. We briefly summarize this research and examine the disagreements and commonalities across the theoretical perspectives. This work may provide a good example why a multi-level, multi-method, and multi-paradigm approach holds the greatest promise for rapid theoretical progress. 相似文献
165.
This teaching case illustrates the innovative application of an instructional technology modality, the WebQuest, in family
therapy training. It describes what a WebQuest involves, and how it can be used as a tool for developing critical thinking
and application of contemporary marriage and family therapy (MFT) theory to social and global issues. The authors discuss
the results of the survey and focus groups conducted to assess the value of this assignment from the students’ perspectives.
Results indicate that its application in a family therapy theories course fostered students’ awareness of global issues impacting
family life, integration of family therapy theories to serve children and families, creativity in developing their own intervention
models, and ability to discuss and integrate knowledge from different knowledge bases and perspectives. 相似文献
166.
Nathan Stemmer 《Journal for General Philosophy of Science》2007,38(2):315-327
Quine’s eliminativist theory has largely been ignored by the philosophical community. This is highly regrettable because Quine’s
theory is probably close to correct. Now, the probable correctness of Quine’s theory has an important consequence since, according
to the theory, there are no mental entities (events, states, phenomena, properties, etc.) nor do such entities play any role
in a scientific account of the relevant phenomena. But the hundreds or probably thousands of publications that deal with issues
such as mental causation, the nature of qualia, supervenience of the mental, or multiple realizability, presume the existence
of, or at least attribute a positive role to, mental entities. The probable correctness of Quine’s theory therefore suggests
that all these publications are worthless and reading them is a waste of time just as reading studies about how crystal spheres
can move planets is considered nowadays a waste of time.
相似文献
Nathan StemmerEmail: |
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168.
KAZUHISA TAKEMURA 《The Japanese psychological research》2007,49(2):148-156
Abstract: This paper proposed two types of fuzzy set models for ambiguous comparative judgments, which did not always hold transitivity and comparability properties. The first type of model was a fuzzy theoretical extension of the additive difference model for preference that was used to explain ambiguous preference strength. The second was a fuzzy logic model for explaining ambiguous preference in which preference strength was bounded, such as a probability measure. In both models, multi-attribute weighting parameters and all attribute values were assumed to be asymmetric fuzzy L-R numbers. For each model, a method of parameter estimation using fuzzy regression analysis was proposed. Numerical examples were also provided for comparison. Finally, the theoretical and practical implications of the proposed models were discussed. 相似文献
169.
A social dynamics perspective of aggression in school is presented. This framework focuses on the role of natural social processes in the establishment and maintenance of aggressive behavior in the school context. The five articles in this special issue are briefly reviewed and a synthesis of their contributions for understanding the social dynamics of aggression in school is underscored. Future research and intervention implications are also discussed. The need for examining the role of school social dynamics in conducting social skills interventions, functional behavioral assessments, and the development of positive behavioral support plans is emphasized. 相似文献
170.
Nick Haslam Brock Bastian Christopher Fox Jennifer Whelan 《Personality and individual differences》2007,42(8):1621-1631
Lay conceptions of personality change and continuity were examined in a sample of 112 undergraduates. Participants rated their personal change over 5 years (past or future), the change they perceived to be normative over 10-year age spans between 15 and 65, their beliefs about whether personality is fixed or malleable (“lay theories”) and their beliefs about the causes of personality change and continuity. Beliefs about normative personality change generally corresponded to research evidence on adult trajectories of the Big Five factors, with some age bias, whereas recalled and anticipated personal change tended to be more positive than these norms. Participants tended to endorse environmental causes more for personality change than for continuity. Lay theories were not consistently associated with these causal beliefs, or with beliefs about personal and normative change. 相似文献