A limited,apolitical, and open Paulo Freire

Paulo Freire’s work is often characterized and used in terms that seek to produce widespread political and economic changes across societies. Peter Roberts, however, in his book Paulo Freire in the twenty-first Century, offers readers a much different way of approaching Freire’s work. Throughout his book, Roberts presents Freire as recognizing the limitations of educational initiatives, as not seeking specific macro-political objectives, and as emphasizing openness to alternative discourses. These themes weave throughout each chapter of the book, in which Roberts examines a wide range of topics, from Freire and Dostoevsky to reason and emotion to political correctness to Freire and the Tao Te Ching. In this review essay, I engage a number of purposes. I elucidate and trace these three themes as they weave throughout and support the various topics that Roberts examines in his book. I illustrate how Roberts’s treatment of these themes challenges many of the interpretations of Freire’s work found within the critical literature, and, through this critique, it offers readers new ways of thinking about Freire’s thinking. Lastly, I discuss how Roberts’s thoughts suggest new ways that Freire’s work, and critical education in general, might begin to make more meaningful and practical inroads into public education and might develop new avenues of scholarship on Freire’s work.     

Secondary school learners’ contextualized knowledge about reflection and refraction: a case study from South Africa

Background: The development of context-based science curricula has been identified as one of the most effective curricular innovations to develop interest and better conceptual understanding of many areas in science. However, such a curriculum can be more fruitful if it starts with the assessment of learners’ contextualized knowledge about the science topic in hand.

Purpose: The focus of this paper is to investigate secondary school learners’ knowledge of the optical phenomena of reflection and refraction in relation to certain contexts.

Sample: The sample for the study consisted of two Grade-11 intact groups of 70 learners in total at a selected senior secondary school in the Mthatha District of the Eastern Cape Province in South Africa.

Design and methods: The study focused on exploring the learners’ conceptions about the optical phenomena of reflection and refraction. The data were collected from three two-tier questions, which exposed the learners to certain contexts which could be explained using optics principles. The first tier of each question was a context-based multiple-choice question and in the second tier, the participants were asked to justify their answers to the first tier.

Results: Majority of the participants failed to correctly interpret the given contexts using optics principles. Moreover, only a few learners could justify their scientifically acceptable answers with scientifically acceptable explanations.

Conclusions: The participants experienced serious conceptual difficulties when they were required to apply the optics concepts in the real-world contexts presented to them. Moreover, the participants’ conceptual difficulties about reflection and refraction were also found to be associated with their inability to understand correctly the optical processes involved in vision.     

South African teachers’ ability to argue: The emergence of inclusive argumentation

This paper explores the argumentation ability of ten science teachers in two South African schools on opposite ends of the resource spectrum. Toulmin's model is used to analyse individual contributions in six group discussions. The findings show that levels of argumentation improve with teachers’ involvement in the development of teaching resources and the closeness of the argumentation task. The nature of the arguments is permeated by inclusiveness, thus precluding the use of rebuttals, traditionally a requirement for high-quality arguments. Based on the ubuntu worldview, a model of inclusive argumentation is proposed with implication for teaching and a scheme of assessable levels of argumentation.     

Determining the academic and affective outcomes of dyad reading among third graders

Abstract

Dyad reading involves a lower level reader paired with a higher level reading partner who models proficient oral reading while providing access to challenging texts. Previous research has reported increased reading fluency and comprehension for participants of dyad reading; however, to date no research has investigated how dyad reading may influence student attitudes toward reading. Using mixed effects linear modeling, this quasi-experimental study of third graders investigated the academic and attitudinal outcomes for students who read in dyads for 15?minutes daily for 90 school days. Results indicated that dyad readers experienced mixed outcomes in improving reading proficiency and a pattern of decline in reading attitudes compared to students in the control group. While lower level dyad readers demonstrated significant gains on a measure of comprehension, there were no differences between groups on several other measures of reading. Recommendations target how to maximize the use of dyad reading to support students’ reading development without eroding their perceptions of themselves as readers.     

The dynamics of elite paddling on a kayak simulator

During kayak paddling, athletes attempt to maximize kayak velocity with the generation of optimal paddle forces. The aim of the current study was to examine ten elite kayakers and identify a number of key biomechanical performance variables during maximal paddling on a custom kayak simulator. These included analysing the effect of side (left and right) and period (beginning, middle, and end of the kayak simulation) on paddle force, paddle angle, mechanical efficiency, and stroke timing data. Paddle kinetics and kinematics were measured with strain gauge force transducers attached to either end of the ergometer paddle and using a 3D motion analysis system respectively. Results indicated a significantly greater mechanical efficiency during the right paddle stroke compared with the left (P < 0.025). In addition, analysing the effect of period, peak paddle force demonstrated a significant reduction when comparing the beginning to the middle and end of the simulated race respectively (P < 0.025). Examination of individual force profiles revealed considerable individuality, with significant variation in the time course of force application. Analysis of the profiles presented may provide meaningful feedback for kayakers and their coaches.     

Fallstudie: Parallele Realisierung geophysikalischer Basisalgorithmen in Java

Zusammenfassung.   Der Programmiersprache Java wird oft nachgesagt, da? sie zu langsam für ernsthafte Softwareentwicklung sei, besonders im Bereich des wissenschaftlichen Rechnens. Das Ergebnis dieser Fallstudie zeigt jedoch, da? bei parallelen geophysikalischen Anwendungen eine Verlangsamung von weniger als Faktor 4 im Vergleich zu einer ?quivalenten Realisierung in Fortran90 bzw. High Performance Fortran (HPF) erreicht werden kann. Dieses Resultat wurde sowohl auf einer parallelen Maschine mit gemeinsamem Speicher (SGI Origin2000) als auch auf einer Maschine mit verteiltem Speicher (IBM SP/2) erreicht. Der Geschwindigkeitseinbu?e stehen sprachspezifische Vorteile von Java gegenüber Fortran90/HPF gegenüber: Objekt-orientierter Java-Code ist leichter zu warten und wiederzuverwenden als Fortran-Code und darüberhinaus vollst?ndig portabel, sogar zwischen Parallelrechnern mit unterschiedlichen Speicherkonzepten. Ferner ist zu erwarten, da? bessere übersetzertechnologien den Leistungsunterschied zwischen Java und Fortran weiter verkleinern werden. Eingegangen am 24. Dezember 1997 / Angenommen am 2. April 1998     

Quantitative evaluation of persuasive appeals using comparative meta-analysis

Message appeals are a key component of communication campaigns and an important source of campaign influence. However, research on them is heavily fragmented and it is difficult to generalize findings from the many diverse field studies. Based on a large and unique data set using quantitative and qualitative meta-analyses, this research provides measures of the relative impact of each type of appeal, as well as the major differences among them, and identifies the moderating variables that lead to a better understanding of each. This investigation is based on persuasion research, which provides a framework for understanding the unique characteristics of these advertising appeals. It highlights empirical gaps in the academic literature and acts as a conceptual guide for our research hypotheses. Results reveal weaker effect sizes than those previously reported in the literature and show important differences among appeals that lead to a “hierarchy of appeals.” Specifically, emotional appeals, led by sex and humor, appear to be more effective than fear and rational appeals. The study finds new theoretical and empirical generalizations; some results are counterintuitive and differ from findings generated from single appeal studies. Findings are of theoretical and practical importance.     

The 2002 revision of the American Psychological Association's ethics code: Implications for school psychologists

The Ethical Principles for Psychologists and Code of Conduct has been recently revised. The organization of the code changed, and the language was made more specific. A number of points relevant to school psychology are explicitly stated in the code. A clear advantage of including these items in the code is the assistance to school psychologists negotiating ethical dilemmas in their work setting. This article provides an overview of the revisions in the code most applicable to school psychologists and a detailed analysis of three areas of the code: psychological assessment, the implications and application of the modifiers in the code that guide ethical decision making and correct conduct, and diversity issues. © 2005 Wiley Periodicals, Inc. Psychol Schs 42: 433–445, 2005.     

睡美人

很久很久以前，住着一位国王和一位王后，他们很想有个孩子，却一直未能如愿。有一天．在王后沐浴的时候，一只青蛙从水中跳了出来，它告诉王后：“一年之后，你会有一个女儿。”