Experimental micro-histories,private speech and a study of children’s learning and cognitive development / Microhistorias experimentales,habla privada y un estudio del aprendizaje y el desarrollo cognitivo en los niños

Abstract

In this paper, we present the recent development of a methodological approach originally devised by Perret-Clermont and Schubauer-Leoni called ‘experimental micro-histories’. This approach allows us to investigate processes of change that often seem to be underestimated in the typical experiments used in developmental psychology that focus on the average impact of certain factors. Two dyads were studied in-depth to understand how, for better or for worse, children use elements learned from previous conversations in their subsequent self-regulatory processes. Different trajectories of private-social speech were studied through different phases (child-adult scaffolding phase and a subsequent child-child interaction phase) and will be discussed in order to reconsider the necessity of adopting a micro-historical focus on developmental processes of change.     

Dialogical PISA: correct answers are all alike,every incorrect answer is incorrect in its own way

Why do students give incorrect answers in PISA? What are the reasons for giving incorrect answers? Do all incorrect answers reflect only the lack of competence or might even a competent child make a mistake? The aim of this article is to contribute to a better understanding of these issues. In the current investigation, we selected six students who responded incorrectly to one PISA question in mathematics or science when they solved it individually. Then, we analyzed their understanding of the PISA task and their reasoning about it through a dialogical problem solving in triads to identify why they made an incorrect answer. Moreover, we tried to determine how the shared peer interaction might change the understanding and reasoning of the child and enable her/him to solve the task. The results of this study illustrate the differences between incorrect answers reflecting lack of competence and those incorrect answers, which appear for some other reasons. Based on the dialogical problem solving approach, we analyzed these two types of incorrect answers and the reasoning trajectories behind them.     

A Conceptual View of Web-Based E-Learning Systems

Starting from a general framework for web-based e-learning systems that is based on an abstraction layer model, this paper presents a conceptual modelling approach, which captures the modelling of learners, the modelling of courses, the personalisation of courses, and the management of data in e-learning systems. Courses are modelled by outline graphs, which are further refined by some form of process algebra. The linguistic analysis of word fields referring to an application domain helps to set up these course outlines. Learners are modelled by classifying value combinations for their characteristic properties. Each learner type gives rise to intentions as well as rights and obligations in using a learning system. Intentions can be formalised as postconditions, while rights and obligations lead to deontic constraints. The intentions can be used for the personalisation of the learning system to a learner type. Finally, the management of data in an e-learning system is approached on two different levels dealing with the content of individual learning units and the integrated content of the whole system, respectively. This leads to supporting databases and views defined on them.     

Exploitation characteristics of the inspec data base in the SDI system at the Technical University of Wroc aw

The investigation results as well as the conclusions which can be drawn from them, on the subject of exploitation the INSPEC data base are presented in this paper. The investigations were concerned with the length of information queries and the number of answers as well as the relationship between them, depending on the character of the user. The results obtained suggest the possibility of lowering the costs of exploitation of the INSPEC data base in the SDI system.