The effects of narrative context on French verbal inflections: A developmental perspective

This experiment examines how narrative context affects French subjects' selection of past imperfective (imparfait) vs. perfective inflections with different predicate types. Adults and 10-year-old children were asked to inflect verbs presented in their written infinitive form in two conditions: (a) in isolated sentences; (b) embedded in the beginning, middle, or end of narratives. Regardless of conditions, the adults rarely used theimparfait with punctual resultative predicates. In both conditions, the frequency ofimparfait was high with durative predicates, particularly with aresultative ones, but it varied with position in the narratives, being highest at the beginning and lowest at the end. Although the children also used the imparfait frequently with durative predicates, they overgeneralized it to punctual resultative ones, regardless of conditions and of positions. These results show that adult uses of the imperfective/perfective distinction are determined by both predicate properties and grounding in narrative context. The children are less sensitive to some predicate properties than the adults and they do not differentiate imperfective/perfective aspect consistently as a function of discourse context.     

Derrida and Education Today

Studies in Philosophy and Education -     

Gratitude and parents' rights over their children's religious upbringing

Although most parents claim their children owe them obligations of gratitude, there has been no attempt to analyze gratitude as a basis for parental rights over children's religious upbringing. Parents' provision of benefits to their children in an altruistic fashion requires that children ought normally to honor parental requests that they participate in religious rituals and attend sectarian education. However, the limits on parental altruism and the self‐defeating nature of extreme demands for requital of gratitude suggest that gratitude is not a sufficiently strong basis to justify the rights of parents to prevent their children's exposure to religious beliefs inconsistent with their own. The state acts consistently with children's obligation of gratitude when it offers an education providing children the right to exit their religious communities, but not when it seeks to promote radical religious autonomy.     

Synapse specificity of long-term potentiation breaks down with aging

Memory shows age-related decline. According to the current prevailing theoretical model, encoding of memories relies on modifications in the strength of the synapses connecting the different cells within a neuronal network. The selective increases in synaptic weight are thought to be biologically implemented by long-term potentiation (LTP). Here, we report that tetanic stimulation of afferent fibers in slices from 12-mo-old mice triggers an LTP not restricted to the activated synapses. This phenomenon, which can be anticipated to hinder memory encoding, is suppressed by blocking either L-type Ca(++) channels or Ca(++)-induced Ca(++) release, both well known to become disregulated with aging.     

Vibrotactual choice reaction time,tactile receptor systems and ideomotor compatibility

In most of the literature on human performance the results of an experiment by Leonard (1959) are quoted as the most outstanding example of perfect S-R-compatibility. In that experiment the fingertips were stimulated by a 50 Hz vibration; the vibrating armature had to be depressed and the reaction times of the right index finger were recorded. The reaction time was found not to increase with an increasing number of tactual choices. In experiment 1 of the present study, also applying 50 Hz vibrations, the reaction times of other fingers were also reported. In addition the response stimulus interval (RSI) was varied. Leonard's results were not replicated: reaction time increased with the number of tactual choices at all levels of RSI. In experiment 2 the frequency and amplitude of vibration were systematically varied and it turned out that these variables could account for the differences between the results found. An increase in reaction time with the number of tactual choices was found with weak vibrations, but not with strong vibrations. The differences in reaction time patterns appeared to be caused by differences in tactile receptor systems (i.e. the non-Pacini versus the Pacinian system). It was concluded that the concept of S-R-compatibility did not cover the pattern of results but that the concept of ideomotor compatibility did.     

De quelques regles d'interpretation des elements irrationnels de la psycho-sociologie des peuples par l'analyse psycho-linguistique des vocables et des reactions sociales qu'ils provoquent,notamment chez les Slaves

Sans résumé     

The characteristics of LTP induced in hippocampal slices are dependent on slice-recovery conditions

In area CA1 of hippocampal slices which are allowed to recover from slicing "in interface" and where recordings are carried out in interface, a single 1-sec train of 100-Hz stimulation triggers a short-lasting long-term potentiation (S-LTP), which lasts 1-2 h, whereas multiple 1-sec trains induce a long-lasting LTP (L-LTP), which lasts several hours. Moreover, the threshold and the features of these LTP depend on the history of the neurons, a phenomenon known as metaplasticity. Here, where all recordings were performed in interface, we found that allowing the slices to recover "in submersion" had dramatic metaplastic effects. In these conditions, a single 1-sec train at 100 Hz induced an L-LTP which lasted at least 4 h and was dependent on protein synthesis. Interestingly, this type of metaplasticity was observed when the concentration of Mg(++) used was 1.0 mM but not when it was 1.3 mM. The LTP induced by four 1-sec trains at 100 Hz was similar whatever the incubation method. However, the signaling cascades recruited to achieve that pattern were different. In the interface-interface paradigm (recovery and recording both in interface) the four-train induced LTP recruited the PKA signaling pathway but not that of the p42/44MAPK. On the contrary, in the submersion-interface paradigm the four-train induced LTP recruited the p42/44MAPK signaling pathway but not that of the PKA. To our knowledge this is the first example of metaplasticity involving the recruitment of signaling cascades in LTP.     

Metacognition,Metalanguage and Metapragmatics

In this article, the author briefly reports John Flavell's analysis of metacognition. By attempting to integrate metalinguistic activities into this analysis, the author brings to light several interesting characteristics of the field of metalinguistics and its current state of research. Firstly, it appears that, unlike other meta-abilities, the metalinguistic abilities are defined in terms of their objects. On this basis, metalinguistic activities are at least partially independent of other metacognitive activities. Secondly, it appears that the position of metapragmatics in relation to metalinguistics is in need of greater clarification. In particular, it seems necessary to draw a distinction between metapragmatic knowledge and metapragmatic experience. The fact that this distinction is not usually made contributes to the heterogeneity of this field of study and gives rise to fruitless controversy. Finally, the analysis reveals that the manipulation of writing mobilises aspects of metalinguistic knowledge which are not mobilised spontaneously through speech. The study of where this knowledge is positioned and of the cognitive burden its manipulation represents at various levels of reading and writing ability has yet to be developed.