From conceptual development to science education: a psychological point of view

A theoretical framework based on cognitive/developmental research is described. It is argued that science learning is a gradual process during which initial conceptual structures based on children's interpretations of everyday experience are continuously enriched and restructured. Conceptual change also involves increased metaconceptual awareness, cognitive flexibility, and theoretical coherence. Some of the implications of this research for the development of science curricula and for instruction are discussed. It is also argued that while cognitive/developmental research can provide us with important information about the process of learning science, it does not provide much information about the external, environmental variables that can facilitate cognitive performance and conceptual change. What is needed in the future is the development of a theory of learning that bridges science education and cognitive/developmental research. Such a theory should specify the mechanisms that can take an individual from one level of cognitive performance to the next and relate them to situational and cultural factors.     

IRT Approaches to Modeling Scores on Mixed-Format Tests

This article considers psychometric properties of composite raw scores and transformed scale scores on mixed-format tests that consist of a mixture of multiple-choice and free-response items. Test scores on several mixed-format tests are evaluated with respect to conditional and overall standard errors of measurement, score reliability, and classification consistency and accuracy under three item response theory (IRT) frameworks: unidimensional IRT (UIRT), simple structure multidimensional IRT (SS-MIRT), and bifactor multidimensional IRT (BF-MIRT) models. Illustrative examples are presented using data from three mixed-format exams with various levels of format effects. In general, the two MIRT models produced similar results, while the UIRT model resulted in consistently lower estimates of reliability and classification consistency/accuracy indices compared to the MIRT models.     

Improving pre-laboratory preparation of first year university chemistry students

This study uses an action research approach to investigate how different modes of pre-laboratory preparation contribute towards a fruitful laboratory experience for first year students on an access programme. We considered the experience to be fruitful if the students successfully acquired procedural understanding, communicative competence and were able to apply the conceptual understanding to make the purpose of the labs meaningful. A group of students was observed by participant observers during 1996. Data was gathered during laboratory sessions and from written pre-laboratory work. These data were analysed and changes were instituted in the running and conceptualization of the laboratory in the subsequent year. A group of students was again observed and data collected. Two important factors emerged from the analysis of the data. One finding was the importance of adequate student preparation for the laboratories, regardless of the mode of preparation employed. Another was that the ability to prepare depended on the conceptual and procedural understanding of the laboratory as a whole. Preparedness is also important if conceptual benefit is to be obtained from the practical experience.     

Relationship between accuracy and complexity when learning underarm precision throwing

Learning precision ball throwing was mostly studied to explore the early rapid improvement of accuracy, with poor attention on possible adaptive processes occurring later when the rate of improvement is reduced. Here, we tried to demonstrate that the strategy to select angle, speed and height at ball release can be managed during the learning periods following the performance stabilization. To this aim, we used a multivariate linear model with angle, speed and height as predictors of changes in accuracy. Participants performed underarm throws of a tennis ball to hit a target on the floor, 3.42 m away. Two training sessions (S1, S2) and one retention test were executed. Performance accuracy increased over the S1 and stabilized during the S2, with a rate of changes along the throwing axis slower than along the orthogonal axis. However, both the axes contributed to the performance changes over the learning and consolidation time. A stable relationship between the accuracy and the release parameters was observed only during S2, with a good fraction of the performance variance explained by the combination of speed and height. All the variations were maintained during the retention test. Overall, accuracy improvements and reduction in throwing complexity at the ball release followed separate timing over the course of learning and consolidation.     

The reality and potential of correcting pupils' work in mathematics

Resumé Par un survol des pratiques et des effets de la correction des devoirs, on voit que l'on peut en attendre, dans l'état actuel des choses, au mieux une relative neutralité, mais, d'une manière générale, des effets plutôt négatifs. Aucune des propositions sur lesquelles s'appuie implicitement et explicitement l'entreprise de correction n'est vraie. Mais les analyses faites, au lieu d'avoir pour corollaire la constation de la non prise en compte des élèves dans leur logique de réponses et de questions, pourraient constituer un enseignement pour les professeurs, et donc pour les élèves.

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The reality and potential of correcting pupils' work in mathematics

Reflecting on teachers' practice in correcting pupils' work in mathematics, we find that at present we can expect at best a limited neutrality, but in general a more negative stance. None of the principles, implicit or explicit, on which the process of correction is based, is valid. But rather than simply drawing from the analysis the conclusion that the logic of pupils' answers and questions is ignored, the evidence might be far more instructive for the teachers themselves, and ultimately for their pupils.

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J'ai analysé un nombre considérable d'erreurs avec leurs corrections dans le courant de trois ouvrages cités en bibliographie ci-dessous. Dans le ler, on se réfère ici plus particulièrement au chapitre 5. Le dernier ouvrage, comme son sous-titre l'indique (et à propos de la note, pages 224 à 253), a plus particulièrement comme sujet la significatíon des erreurs, et la nécessité qu'il y a à s'en servir dans l'enseignement si on le veut efficace.     

The widening participation agenda: the marginal place of care

This paper is based upon two empirical studies, which identify care‐giving responsibilities as a key mediator of mature students’ – a target group within the widening participation strategy – experiences of higher education. Employing a feminist lens on care, we identify a disjuncture between how students experience the challenges of negotiating care and study, and the narrow and economistic way care is addressed within higher education policy. We point to the broader recognition of care emerging within New Labour’s policies on the reconciliation of paid work and family life and argue that in the context of increasing expectations that learning is for life, care needs to be recognised in a broader form at the interface of both education and employment. Drawing on the notion of a ‘political ethics of care’, we conclude by identifying elements that should be included in a higher‐education ‘care culture’.     

Race/ethnicity and the start of child care: A multi-level analysis of factors influencing first child care experiences

Early childhood education and care experiences play an important role in children's development and school readiness with, in general, sustained exposure to high quality, center-based care leading to positive outcomes. Hispanic parents have been shown to be less likely than others to place their children in center-based care, particularly when children are very young—a pattern that contrasts African American parents’ tendency for earlier use of center-based care. This paper examines child care choice from a contextual perspective. Using a multi-level modeling approach, we consider ethnicity and race, at the individual and neighborhood levels, in relation to the age at which children first participate in non-parental care and the type of care they first experience. Using data from the ECLS-K, the 1990 Census and other contextual sources, we demonstrate that Hispanic parents’ later use of care is explainable by economic and work participation factors at the family level, while neighborhood proportion of Hispanic individuals is associated with delayed entry into child care. In contrast, the observed early use of care among African American families persists after accounting for economic and work factors, and appears independent of differences in neighborhood context. Limitations and implications for policy and practice are discussed.