Del pensamiento formal a las concepciones espontáneas: ¿Qué cambia en la enseñanza de la ciencia?

Resumen

En los últimos años se han desarrollado dos concepciones distintas del alumno adolescente en relación con la enseñanza de la ciencia. Por un lado, se ha analizado a los alumnos en términos de su capacidad para el pensamiento formal y, por otro, se han descrito innumerables concepciones espontáneas desviadas que los alumnos adolescentes poseen con respecto a los fenómenos científicos. El presente artículo revisa y compara los fundamentos epistemológicos y psicológicos de ambos enfoques, además de revisar las implicaciones didácticas que se derivan de cada una de esas posiciones para la enseñanza de la ciencia.     

Contribution of historical Spanish inventions to the knowledge of olive oil industrial heritage

This article presents new research, which has the objective of quantifying the knowledge produced by historical technological innovations in the field of olive oil industrial heritage. It studies inventions related to the mechanical processes of the extraction of olive oil between 1826 and 1966, which are recorded in the Historical Archive of the Spanish Patent and Trademark Office. It uses a new adaptation of the methodology of knowledge management (KM) defined by Nonaka and Takeuchi. We have obtained the knowledge value of each innovation according to the level of technological knowledge registered at the time, while distinguishing between the historical evolution of inventions relating to milling and those relating to pressing. In the first analysis, the results show a recession in the quantitative level of knowledge in the olive oil sector with respect to the technological potential of the time. However, when contrasted with the events relating to industrial heritage at the time, it is possible to account for this technological evolution and prove the validity of the methodology used. The results show that general evolution of the knowledge generated has decreased, particularly in the pressing process, although this is not the case in the milling process.     

Didactic Problems in the Concept of Electric Potential Difference and an Analysis of its Philogenesis

This paper makes an analysis of the different didactic problems to come from the fact that electric charge is inseparable from the mass, the impossibility of its direct observation (only its effects) and the meaning associated with the basic concepts of electricity, like electric potential or electric potential difference.In order to know the origin of the different meaning found in textbooks of the concept of electric potential difference, we have made an analysis of the relevant historical milestones. In this review, it is seen that the content assigned to it is taken from the mathematical formalism of field theory, which causes problems in its structure and its logico-formal communication as well as teaching problems.     

The information practices and politics of migrant-aid work in the US-Mexico borderlands

Abstract

Numerous organizations work to provide humanitarian aid to undocumented migrants along the US-Mexico border—from running shelters in Mexico to placing water on migratory trails. Resistance to information-sharing between organizations (and to the public), especially through technologically mediated means, is common. However, some organizers and volunteers work across organizational boundaries and share information informally. Information secrecy is often justified by concerns that law enforcement authorities or anti-immigration activists might gain access to information, allowing them to harm, detain or remove migrants, or interfere with humanitarian work. The choices made about the collection and (non)disclosure of information are manifestations of what we call “liminal” information practices: such behaviors are unique to humanitarian volunteers working in the gray, ethical area between law enforcement and humanitarian values and action, and they are guided by the information politics at play within this context.     

Microaggressions in graduate students’ lives: How they are encountered and their consequences

This article explores the experiences of teaching assistants from nonmainstream backgrounds in a predominantly white institution (PWI) of U.S. education. We focus on how such teaching assistants experience and respond to “microaggressions” or subtle challenges to their teaching based on race and ethnicity. We also explore the consequences of microaggressions for teaching assistants’ future career plans. Analyses of life history interviews show how processes of microaggressions permeated teaching assistants’ relationships with white prospective and cooperating teachers. The authors suggest ways to interrupt these in teacher education programs.     

Hope for Children Trapped in Failing Schools: The Promise of Crawford v. Davy

On October 4, 2007, a trial level court in New Jersey dismissed Crawford v. Davy, a class action lawsuit filed on behalf of 60,000 schoolchildren throughout the state seeking the court's authority to leave schools that fail to educate their students. By filing suit, plaintiff schoolchildren had hoped to be transferred to an alternative successful public or private school utilizing their pro rata share of state and local school funds to subsidize the transfer. Now, the dismissal of Crawford consigns these children to poor inadequate neighborhood schools indefinitely. If the dismissal of Crawford v. Davy is not reversed on appeal, it will not only extinguish the hope of plaintiff schoolchildren to receive an equal and adequate educational opportunity, but could threaten the right of a thorough and efficient education guaranteed by the State Constitution and reverse gains achieved over the past 40 years in New Jersey's education jurisprudence. This article places Crawford in the context of the state's enduring legal struggle to equalize educational opportunities and discusses its claims and purposes in relation to that history. The article then addresses the significance of the Crawford dismissal on the state's legal precedents, especially rulings in the on-going Abbott v. Burke equity funding litigation. Finally, the article concludes with a prediction of the impact that Crawford's dismissal may pose for the larger equity/adequacy litigation movement playing out across the country. For the moment, the hope of 60,000 plaintiff schoolchildren is diminished. Only time and New Jersey's appellate courts will dictate whether their hope for an equal and adequate education shall survive.     

Students’ Understanding of the Special Theory of Relativity and Design for a Guided Visit to a Science Museum

The present paper describes the design of teaching materials that are used as learning tools in school visits to a science museum. An exhibition on ‘A century of the Special Theory of Relativity’, in the Kutxaespacio Science Museum, in San Sebastian, Spain, was used to design a visit for first‐year engineering students at the university and assess the learning that was achieved. The first part of the paper presents the teaching sequence that was designed to build a bridge between formal teaching and the exhibition visit. The second part analyses the potential of the exhibition and the aforementioned teaching sequence to influence the students’ knowledge of three aspects of the Special Theory of Relativity. The results obtained show that the design of the visit, with both pre‐visit and follow‐up activities, was effective as a means of increasing students’ understanding and stimulating their ability to argue scientifically.     

Prediction of Post-High School Destination Choice from Curriculum,Financial Need,and Students’ Rating of Parents’ Wishes for Post-High School Occupation

Data from a survey of 2,431 students attending high schools in Hawaii indicated that students agreed with their parents’ wishes for post-high school occupation. Females tended to choose more academic post-high school destinations than males. An inverse relationship between academic high school curricula and post-high school academic goals was found, probably due to the fact that females were academically upwardly mobile. The need for financial assistance tended to decrease academic aspirations. It was concluded that knowledge of parental values, differences in academic aspirations between males and females, financial need, and a student’s high school curriculum would be valuable in helping students select post-high school destinations.     

Utilizing Conjoint Analysis to Explicate Nurse–Patient Interaction Among Geriatric Incarcerated Individuals

There has been no attempt to explicate elderly patients’ preferences during nurse-patient interaction in the context of a prison setting. A purposive sample of 347 was chosen from a national Philippine prison based on the following inclusion criteria: (a) 55 years old and above, (b) incarcerated, (c) no psychological impairment, and (d) can amply read and write. Via conjoint analysis (CA), 36 from 81 nurse–patient interaction cards were produced according to orthogonal plans, as specified by SPSS. The conjoint analysis model proved to be fit: Pearson R = .993, (p < .05) Kendall's tau = .944 (p < .05), Kendall's tau for holdouts = .799 (p < .05). The use of CA showed the top 3 attributes: language (21.26%), smile (18.49%), and eye contact (14.19%). Overall, the following levels are highly preferred by respondents: “vernacular” language (utility = 1.377, SE = .21.26), “with” smile (utility = 1.198, SE = .082), and “constant” eye-contact/gaze (utility = .919, SE = .082). Significant differences in nurse–patient interaction were noted in age brackets, current health condition, and years of incarceration, except in educational attainment. Overall, geriatric incarcerated individuals preferred nurses who verbally utilize close-ended, nonfrequent, and without follow-up questions, speak vernacular in a low and constant intonation, give encouragement, and praise. When touch is needed, the respondents preferred same gender nurses. Respondents find it more comfortable when nurses utilize ‘friendly’ space during the interaction, smile, and maintain constant eye contact. To achieve more consistent care, nursing actions must be in accordance with these preferences.