Hybrid Deterministic Views About Genes in Biology Textbooks: A Key Problem in Genetics Teaching

A major source of difficulties in promoting students’ understanding of genetics lies in the presentation of gene concepts and models in an inconsistent and largely ahistorical manner, merely amalgamated in hybrid views, as if they constituted linear developments, instead of being built for different purposes and employed in specific contexts. In this paper, we report the results of a study about how textbooks can provide the grounds for the students’ construction of such hybrid views about genes. These views are a key problem in genetics teaching, because they make it more difficult that students properly understand this central biological concept and strengthen genetic deterministic ideas, which characterize a widespread discourse about genes in the public opinion. We analyzed 18 textbooks using categorical content analysis, employing categories derived from the literature addressing the historical development of gene models and concepts. Our findings indicate that the analyzed textbooks do convey hybrid views about genes, with no correspondence to scientific models related to this biological concept. These views reinforce genetic deterministic discourses and may lead students to serious misunderstandings about the nature of genes and their role in living systems, with consequences to future learning about genetics.     

Conceptual Variation or Incoherence? Textbook Discourse on Genes in Six Countries

The aim of this paper is to investigate in a systematic and comparative way previous results of independent studies on the treatment of genes and gene function in high school textbooks from six different countries. We analyze how the conceptual variation within the scientific domain of Genetics regarding gene function models and gene concepts is transformed via the didactic transposition into school science textbooks. The results indicate that a common textbook discourse on genes and their function exist in textbooks from the different countries. The structure of science as represented by conceptual variation and the use of multiple models was present in all the textbooks. However, the existence of conceptual variation and multiple models is implicit in these textbooks, i.e., the phenomenon of conceptual variation and multiple models are not addressed explicitly, nor its consequences and, thus, it ends up introducing conceptual incoherence about the gene concept and its function within the textbooks. We conclude that within the found textbook-discourse ontological aspects of the academic disciplines of genetics and molecular biology were retained, but without their epistemological underpinnings; these are lost in the didactic transposition. These results are of interest since students might have problems reconstructing the correct scientific understanding from the transformed school science knowledge as depicted within the high school textbooks. Implications for textbook writing as well as teaching are discussed in the paper.     

Inferencias causales y clasificación: su relación en niños de 4–7 años

Resumen

La presente investigación analiza la relación entre la adquisición de la clasificación y la ca- pacidad para realizar inferencias causales. Además, se pretende comprobar en qué medida los contenidos de las historias causales (en términos de animado/inanimado, de los antecedentes y los consecuentes) provocan diferencias en la ejecución. Participaron 70 niños de 8 centros públicos de EGB de Murcia, el rango de edad oscilaba entre 4;0 y 7;10. Los resultados indican cómo a medida que los sujetos dominan la clasificación muestran una mayor capacidad para realizar inferencias causales. No aparecen diferencias en la ejecución debida a los contenidos de las historias. Finalmente, se propone un modelo causal, a partir del modelo de equilibrio de la teoría de Piaget, sobre el desarrollo de las inferencias causales.     

Love Foolosophy: Pedagogy,parable, perversion

Abstract

Popular filmic and literary stereotypes of teachers from Brodie and Chips to Keating and Schneebly have not only reflected a public desire for radically innovative and perverse teaching practices, but also created those paradigms in ways that are not always readily identifiable or traceable. This article seeks to analyse tensions between traditional institutional protocols and contemporary populist opinion on the role of the effective teacher. In doing so, the article takes Peter Weir’s Dead Poets Society (1989) as a primary example of those tensions and argues for a perverse ‘foolosophical’ view of pedagogical performance and a new appreciation for the necessity of ignorance in the classroom. Since ignorance and understanding are not taken as unambiguous antonyms, the article proposes that effective teaching and learning occur most effectively in the interstices between humility and hospitality.     

Integrated assessment on mathematics 12–16

In this paper we give an account of an integrated package of assessment, describing its conceptual posing as well as its formats, functions, use and effects. The package introduces a diversity of materials searching for connecting and integrating different contributions in a multidimensional scheme.     

Knee joint position sense of roller hockey players: a comparative study

This study aimed to compare knee joint position sense of roller hockey players with an age-matched group of non-athletes. Forty-three male participants voluntarily participated in this cross-sectional study: 21 roller hockey players (mean age: 23.2 ± 4.2 years old, mean weight: 81.8 ± 9.8 kg, mean height: 180.5 ± 4.1 cm) and 22 age-matched non-athletes (mean age: 23.7 ± 3.9 years old, mean weight: 85.0 ± 6.2 kg, mean height: 181.5 ± 5.0 cm). Knee joint position sense of the dominant limb was evaluated using a technique of open-kinetic chain and active knee positioning. Joint position sense was reported using absolute, relative and variable angular errors. The main results indicated that the group of roller hockey players showed significantly lower absolute (2.4 ± 1.2º vs. 6.5 ± 3.2º, p ≤ 0.001) and relative (1.7 ± 2.1º vs. 5.8 ± 4.4º, p ≤ 0.001) angular errors in comparison with the non-athletes group. In conclusion, the results from this present study suggest that proprioceptive acuity, assessed by measuring joint position sense, is increased in roller hockey players. The enhanced proprioception of the roller hockey players could contribute to injury prevention and improved performance during sporting activities.     

Unveiling the Colours of Cellulose Nitrate Black and White Film-based Negatives in Colonial Photography

ABSTRACT

Aiming at contributing to the preservation of black and white (B&W) film-based negatives held by Portuguese archives, four photographic collections from the first half of the twentieth century were selected for study. During the macro assessment of the collections the preservation condition and hues found in photographic negatives from the Elmano Cunha e Costa (ECC) were noticed, distinguishing this collection from the remaining ones. Additional attention was given considering that the ECC collection was formed in a colonial context in the 1930s, while the others were formed on the Portugal mainland. The ECC collection results from an ethnographic survey of Angolan tribes recorded with B&W film-based negatives. In this collection, sets of negatives with pink, lemon yellow, greenish, orange brownish, and red brownish hues were found. To identify the origin of such hues, the image layer was analysed by microscale energy-dispersive X-ray fluorescence (μ EDXRF) and scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDX). Additionally, to assess the base decay and its effect on the formation of hues, the plastic supports were characterized by Fourier transform infrared microscopy (μ FTIR). To complement the assessment of the film-base decay, pH was measured by using combined microelectrodes. The identification of mercury, iodine, chromium, and iron by μ EDXRF allowed correlation of the hues found in the negatives with chemical corrective treatments performed to improve the image quality. SEM-EDX confirmed those results and proved that the elements found were in the photographic emulsion layer. The results obtained are relevant since the hues identified may now be used as markers to indicate the technical work performed on colonial photography. Additionally, the visual and molecular assessment of the negatives’ supports (good to fair condition) allow proposing that the original storage conditions may have had a beneficial contribution to their present condition.     

Assessing quality characteristics of center-based early childhood environments in Germany and Portugal: A cross-national study

Based on the knowledge that direct assessment of the quality of early childhood educational environments is becoming more and more important, this article deals with a coordinated adaptation of the Early Childhood Environment Rating Scale (ECERS) in Germany and Portugal. The ECERS, developed by Harms and Clifford (1980), is a complex rating scale, comprising 37 items, which is implemented to assess major quality characteristics of early childhood classrooms and has been used quite extensively in the US as well as in other countries. In this article we describe how the scale was adapted and we report selected results of a jointly coordinated comparative study on a sample of 103 early childhood classrooms in Germany and 88 in Portugal. The classrooms were classified according to three different types in each country. In particular, we report the item characteristics of the adapted versions, reliabilities and intercorrelations of the total scale and the apriori-subscales, and results of factor analyses. A one-way ANOVA indicates group differences between the six types of classrooms which can be meaningfully interpreted.     

Françoise Dolto (1908–88)

Conclusion Her brief experience of paediatrics and her subsequent discovery of psychoanalysis gave Fran?oise Dolto access to a therapeutic practice enabling her to apply ethical principles that were in conformity with her view of the human person. This path led her to develop a prophylaxis, put to the test in various institutional projects, with a ‘socializing’ or ‘educational’ value. Psychoanalysis thus not only enabled her to bring the light of ethics stemming from it to bear on the therapeutic process, but also stimulated her in her educational and spiritual activity. It was, no doubt, that feature of her thinking that prompted Dolto, in her relations with others, always to use speech for the benefit of the person by calling or recalling each person to his or her archaic desire. This is perhaps the origin of what prompted in her readers and listeners that jubilant enthusiasm so decried thereafter. There is a paradox here between the rejection of any claim to set standards and any imitation, and the power to attract an extensive readership or audience that ‘imitated’ and ‘set standards’, and, above all, was not steeped in the ethical convictions that she alone knew to be essential to any application of her ‘advice’. The very inner distinctiveness of her therapeutic, educational and spiritual action no doubt explains the absence, as Dolto saw it, of pupils to whom she might have taught the essence of her practice, since her subjectivity—the sense of her genius, her faith—is not something that can be taught. Original language: French éric Binet (France) Clinical psychologist in the public child welfare department of the département of Hauts-de-Seine, Paris, and mother and child welfare service for the City of Paris. He is also an instructor at the National Childhood and Family Institute, Centre d'Innovation et de Recherche dans le Champ Social, Paris. He is at present working for a doctorate in the educational sciences at the Université Lyon II, under Professor Guy Avanzini, and completing a thesis on the educational thinking of Fran?oise Dolto. I wish to thank Colette Parcheminier, who is in charge of the association ‘Archives et documentation Fran?oise Dolto’ [Fran?oise Dolto: records and documents], for her invaluable assistance in this work.     

Distributed Teaching Presence and Participants' Activity Profiles: a theoretical approach to the structural analysis of Asynchronous Learning Networks1

The rapid spread of learning networks based on asynchronous written communication — Asynchronous Learning Networks (ALNs) — makes it crucial to assess the possibilities offered by these new environments to facilitate and promote learning processes and learning outcomes. Our interest in this area is specifically directed towards the study of distributed teaching presence understood as the exercise of educational influence, i.e. as the help provided to each other participant in an ALN to promote individual and collective learning. We adopt a multi-method approach that integrates the structural analysis of presence (access and participation) and connectivity (reciprocity and responsiveness) with the content analysis of the participants’ contributions. This article focuses on structural analysis as a relevant and powerful tool for the study of collaborative learning in networking and asynchronous contexts. Its main objective is to show how a relevant and useful system of indicators and profiles, which identify and examine the distribution of educational influence in ALNs, can be constructed. We present the theoretical assumptions surrounding the concept of distributed teaching presence and illustrate the analysis with data from two didactic sequences in higher education. The results show that the structural analysis, when theoretically grounded and oriented, is a powerful tool for identifying different activity profiles related to different levels and modalities of the exercise of educational influence and for assessing the distributed teaching presence in learning networks. Finally, we discuss the benefits and constraints of this kind of analysis.