Phases of procedural learning and memory: characterisation with perceptual-motor sequence tasks

ABSTRACT

Procedural learning and memory has been conceptualised as consisting of cognitive and autonomous phases. Although the Serial Reaction Time Task (SRTT) is a popular task used to study procedural memory (PM), it has not been used to explore the different phases of PM. The present study employed a modified SRTT and investigated whether it can distinguish phases of PM. Our results revealed that performance at the beginning of typing a repeating sequence was marked by a steep learning curve, followed by gradual improvements and ending in high performance levels without further improvement. Steep performance increases characterise the effortful learning of the cognitive phase, gradual increases at higher performances characterise emerging automatisation of the associative phase, and sustained highest performance characterises autonomous procedures when PM has formed. Our study presents an easy-to-use measure, capable of distinguishing phases of PM, and which can be useful to assess PM during brain development.     

Die Rechtsansichten der Eurasier -- Rechtsordnung oder Wertordnung?

In their juridical doctrines, the members of the Evrazijstvo movement advocated the idea of a Russian special path criticizing at the same time the formalism and coldness of the western conception of law, based principally on Roman law. Their views are characterized by an evident priority accorded to justice over law, to the order of values over legal order.     

Prism adaptation in schizophrenia

The prism adaptation test examines procedural learning (PL) in which performance facilitation occurs with practice on tasks without the need for conscious awareness. Dynamic interactions between frontostriatal cortices, basal ganglia, and the cerebellum have been shown to play key roles in PL. Disruptions within these neural networks have also been implicated in schizophrenia, and such disruptions may manifest as impairment in prism adaptation test performance in schizophrenia patients. This study examined prism adaptation in a sample of patients diagnosed with schizophrenia (N=91) and healthy normal controls (N=58). Quantitative indices of performance during prism adaptation conditions with and without visual feedback were studied. Schizophrenia patients were significantly more impaired in adapting to prism distortion and demonstrated poorer quality of PL. Patients did not differ from healthy controls on aftereffects when the prisms were removed, but they had significantly greater difficulties in reorientation. Deficits in prism adaptation among schizophrenia patients may be due to abnormalities in motor programming arising from the disruptions within the neural networks that subserve PL.     

论罗尔斯的政治义务理论

政治义务是政治哲学的核心问题。哈特首先用“相互限制原则”来解释政治义务,这一原则为罗尔斯所继承并加以修正。鉴于该原则存在的诸多问题,罗尔斯在《正义论》中削减了它在政治义务的道德证明中的作用,而诉诸正义的自然责任原则。这个原则仍然受到来自多方面的批评,许多罗尔斯的追随者对这些批评作了回应。罗尔斯从公平游戏原则到自然责任原则的转变反映了他对契约论不同的态度。     

Shared Being,Old Promises,and the Just Necessity of Affirmative Action

Although the residues of official segregation are widespread, affirmative action continues to meet resistance in both official and everyday life, even in such recent Supreme Court decisions as Grutter v Bollinger (539 U.S. 306). This is due in part to a governing ontology that draws the line between individual and collective. But there are other possibilities for conceiving the social, and I offer one here in a theory of affirmative action that is developed through close examination of sharing and promising as elemental qualities of equitable communal life. The nature and value of these actions are demonstrated in narrative formulations of fairness as exemplified in triage and the situation at the end of slavery; of the difference between equality and equity and how justice depends on their conjunction; and finally of theorizing how these may come together in the permutable, opaque, yet resilient interdependence of person and community that represents most deeply the Greek idea of two in one, that is, of one two, not two ones. In these respects the paper is successful insofar as it discloses the kinds of reasoning that underlie both resistance and commitment to affirmative action.     

The Role of Self-Esteem and Social Influences in Aggressive Reactions to Interactional Injustice

Two experiments were conducted to examine the potential negative consequences an organization may face in response to perceptions of interactional injustice. Study 1 found that one potentially negative reaction to perceived injustice can be intended retaliation. In addition, study 1 found that individuals with high self-esteem are most likely to respond negatively to a perceived injustice by indicating that they plan to engage in a retaliatory response. Study 2 explored the effects of one’s situation on intended retaliation behavior. The results again indicate that perceptions of interactional injustice are strongly related to intended retaliation behavior. In addition, the study demonstrates that one’s group can have a significant influence on the perceptions of injustice and one’s subsequent reactions to these injustices.     

Global Economy,Justice and Sustainability

Although this paper attends to some extent to the question whether the global economy promotes or impedes either justice or sustainability, its main focus is on the relationship between justice and sustainability. Whilst sustainability itself as a normative goal is about sustaining inter alia justice, justice itself requires intergenerationally the sustaining of the conditions of a good life for all. At the heart of this is a conception of justice as realising the basic rights of all–in contrast to a more demanding distributive principle or a less demanding principle of not violating the liberty rights or other basic rights of others. Although Pogge’s analysis that the global economy causes harm by failing to realise basic rights is seen as a useful challenge to common libertarian assumptions, the acceptance of other positive correlative duties, following Shue, is advocated. Insofar as the global economy fails to realise basic justice, the question is ‘how far can it realistically be changed?’ and this is a function partly of the moral attitudes of individuals at large.     

On the possibility and desirability of constructing a neutral conception of disability

Disagreement about the properattitude toward disability proliferates. Yetlittle attention has been paid to an importantmeta-question, namely, whether ``disability' isan essentially contested concept. If so, recentdebates between bioethicists and the disabilitymovement leadership cannot be resolved. Inthis essay I identify some of the presumptionsthat make their encounters so contentious. Much more must happen, I argue, for anydiscussions about disability policy andpolitics to be productive. Progress depends onconstructing a neutral conception ofdisability, one that neither devaluesdisability nor implies that persons withdisabilities are inadequate. So, first, I clearaway the conceptual underbrush that makes usthink our idea of disability must bevalue-laden. Second, I sketch someconstituents of, and constraints upon, aneutral notion of disability. This revised version was published online in June 2006 with corrections to the Cover Date.     

Radical Intersubjectivity: Reflections on the “Different” Foundation of Education

This article addresses the question how educational theory can overcome the assumptions of the tradition of the philosophy of consciousness, a tradition which can be seen as the foundation of the modern project of education. While twentieth century philosophy has seen several attempts to make a shift from consciousness to intersubjectivity (Dewey, Wittgenstein, Habermas) it is argued that this shift still remains within the humanistic tradition of modern thought in that it still tries to define, still tries to develop a theory about the human subject. Foucault's thesis of the end of man is interpreted as an attempt to move beyond humanism, an attempt motivated by a sincere concern for the humanity of the subject. Starting from the question as to who comes after the subject, several answers to this question, which all share an interest in the question as to where the subject comes into presence, are discussed (referring to the writings of Tschumi, Arendt and Levinas). In the concluding section it is argued that one way to move beyond the humanistic tradition of modern thought is to conceive of the subject in terms of responsibility and ethics (Levinas) and to conceive of the very task of theory in terms of justice, and not in terms of truth. This, so it is argued, should be the final concern for educational theory and curriculum theory.