Children’s Models about Colours in Nahuatl-Speaking Communities     

Leticia Gallegos-Cázares  Fernando Flores-Camacho  Elena Calderón-Canales  Elvia Perrusquía-Máximo  Beatriz García-Rivera 《Research in Science Education》2014,44(5):699-725

This paper presents the development and structure of indigenous children’s ideas about mixing colours as well as their ideas about each colour, derived from their traditions. The children were interviewed both at school and outside it, and an educational proposal was implemented. Ideas expressed in the school context were analysed using the partial possible model, which states that the inferences and explanations used to describe a subject consist of constricting ideas, rules of correspondence, and a set of phenomenological inferences about processes. After identifying these components in the children’s ideas, we developed models to describe their conceptions about mixing colours. We employed a different approach to analyse children’s ideas related to their cultural context. The results showed that children change from a conception that focuses on colours as entities that do not change and as properties of objects (model 1) to the idea that colour represents a quality of substances or objects that can be modified by mixing colours (model 2). Cultural context analysis showed that stories are independent from one another and that they are not connected to colour mixing processes, only to the actions of colour on people. We concluded that students generate independent constructions between school and cultural knowledge.  相似文献   

Elementary School Children’s Explanations of Day and Night     

Gallegos-Cázares  Leticia  Flores-Camacho  Fernando  Calderón-Canales  Elena 《Science & Education》2022,31(1):35-54

Science & Education - Most students have interacted with scientific representations that are used as teaching resources in schools. Often these external representations present challenges for...  相似文献   

Representations over the Earth’s shape and the process of day and night from Nahua indigenous schoolchildren / Representaciones sobre la forma de la Tierra y del proceso día y noche en niños de escuelas indígenas Nahuas     

Leticia Gallegos-Cázares  Fernando Flores-Camacho  Elena Calderón-Canales  José-Manuel Posada de la Concha 《Infancia y Aprendizaje》2017,40(2):343-380

This research presents the way in which children from a Nahua indigenous community build representations of the Earth’s shape, as well as the process that causes day and night. Concepts from school and local culture were studied. For the first case, a questionnaire was applied to 331 children, out of which 38 children were then interviewed on the topics from the questionnaire. For the cultural ideas, three teachers from the region and 30 children from the sample were interviewed. The results show that the representations depend on the form of questioning and the existence of three models: a flat structure with a celestial dome and mechanisms that hide or remove the Sun or the Moon in order to create day and night; a spherical structure with a surrounding sky, where the Sun and Moon rise and set; and a transitional model with a hollow sphere, flat surface and celestial dome. Cultural ideas do not appear to have any influence over these models, probably due to a loss of the community’s cosmogonic knowledge and the age of the children.  相似文献   

The co-existence of cultural and school science models in indigenous Mexican teachers: the mixing colors case     

Gallegos-Cázares  Leticia  Flores-Camacho  Fernando  Calderón-Canales  Elena 《Cultural Studies of Science Education》2020,15(1):211-239

Cultural Studies of Science Education - This paper presents the development and structure of indigenous Nahua teachers’ ideas about mixing colors, as well their ideas about colors derived...  相似文献   

Infrared Ellipsometry Analysis of Heritage Photographic Prints     

A. Nieto-Villena  J. R. Martínez  J. M. Flores-Camacho  A. Lastras-Martínez  J. A. de la Cruz-Mendoza  G. Ortega-Zarzosa 《文物保护研究》2018,63(8):466-476

Focusing on the photographic archive of Julian Carrillo (Mexico), we study and characterize the photographic processes of a set of 13 photographs dated between 1884 and 1925. By using infrared spectroscopic ellipsometry, we classified a selected set of photographs according to its kind of binder. Thus, we recognized for each photograph, the presence of proteins, and therefore, the particular photographic process. Furthermore, we have identified the presence of baryta layer, the use of plasticizer, and the eventual coating utilized to protect the photograph, whose composition was based in natural organic components, mainly shellac, beeswax, or camphor.  相似文献   

Sound representations in preschool students / Las representaciones del sonido en estudiantes de educación preescolar     

Elena Calderón-Canales  Leticia Gallegos-Cázares  Fernando Flores-Camacho 《Infancia y Aprendizaje》2013,36(4):952-999

Abstract

Studies of the representations that students construct, within the framework of embodied cognition, have shown that perception, action and cognition are linked and are the basis of these representations. From this framework of analysis, this study attempted to identified the representations of 23 preschool students (ages four and five) of sound production, perception and propagation. In-depth interviews were conducted using hypothetical situations and experimental tasks. Three representations were identified. The first one shows a conception of sound centred on objects. Representation 2 also focuses on objects and their relationship with the subject, but it begins to attribute characteristics to the sound itself, and in representation 3, sound has more intrinsic characteristics that expand its possibilities of interacting with the subject and other objects. We conclude that the construction of representations of sound starts from perceptual elements and is linked to actions, although its complexity also shows that they incorporate characteristics that go beyond this corporal correlate.  相似文献   

Incommensurability and Multiple Models: Representations of the Structure of Matter in Undergraduate Chemistry Students     

Fernando Flores-Camacho  Leticia Gallegos-Cázares  Andoni Garritz  Alejandra García-Franco 《Science & Education》2007,16(7-8):775-800

The notion of incommensurability has provided a rationality criterion for the development of scientific theories, as well as some insight into theories developed by students while learning science. However, the relationship between the multiple models held by students and incommensurability requires further discussion. We present the results of empirical work that investigated the multiple models of the structure of the matter held by university students and we analyze these results using the notion of incommensurability. We also point out implications in the construction of students’ scientific models as they move forward in their careers.  相似文献