Bolstering students’ written argumentation by refining an effective discourse intervention: negotiating the fine line between flexibility and fidelity

Instructional Science - Effective interventions are needed to bolster students’ argumentation capacities, an area in which they consistently struggle. Quality Talk (QT) is an approach to...     

Why the Constraints-Led Approach is not Teaching Games for Understanding: a clarification

Background: There is some apparent confusion regarding similarities and differences between two popular physical education (PE) pedagogical frameworks, that is, the Constraints-Led Approach (CLA) and Teaching Games for Understanding (TGfU).

Purpose: Our aim in this commentary is to detail important theoretical and pedagogical concepts that distinguish these approaches, as well as to recognise where commonalities exist.

Findings: In particular, we note that TGfU had its roots in the 1960s in the absence of a substantial theoretical framework, although several attempts to retrospectively scaffold theories around TGfU have subsequently emerged in the literature. TGfU is a learner-centred approach to PE in which teachers are encouraged to design modified games to develop the learner's understanding of tactical concepts. In contrast, the CLA has arisen more recently from the umbrella of Nonlinear Pedagogy (NLP), emerging from the empirically rich theoretical framework of ecological dynamics. The CLA adopts a ‘learner–environment’ scale of analysis in which practitioners are encouraged to identify and modify interacting constraints (of task, environment and learner) to facilitate the coupling of each learner's perceptual and action systems during learning. The CLA is a broader framework which has been adapted for the design of (re)learning environments in PE, sport and movement therapy. Other key distinctions between the approaches include: the overall goals; the way in which the learner and the learning process are modelled; the use of questioning as a pedagogical tool; the focus on individual differences vs. generic concepts; and how progressions and skill interjections are planned and implemented.

Conclusions: Despite such distinctions, the two approaches are somewhat harmonious and key similarities include: their holistic perspective of the learner; the proposed role of the teacher and the design characteristics of learning tasks in each. Both TGfU and the CLA have a powerful central focus on the nature of learning activities undertaken by each individual learner. This clarification of TGFU and the CLA is intended to act as a catalyst for more empirical work into the complementarity of these juxtaposed pedagogical approaches to learning design.     

Chilli anthracnose disease caused by Colletotrichum species

Anthracnose disease is one of the major economic constraints to chilli production worldwide, especially in tropical and subtropical regions. Accurate taxonomic information is necessary for effective disease control management. In the Colletotrichum patho-system, different Colletotrichum species can be associated with anthracnose of the same host. Little information is known concerning the interactions of the species associated with the chilli anthracnose although several Colletotrichum species have been reported as causal agents of chilli anthracnose disease worldwide. The ambiguous taxonomic status of Colletotrichum species has resulted in inaccurate identification which may cause practical problems in plant breeding and disease management. Although the management and control of anthracnose disease are still being extensively researched, commercial cultivars of Capsicum annuum that are resistant to the pathogens that cause chilli anthracnose have not yet been developed. This paper reviews the causal agents of chilli anthracnose, the disease cycle, conventional methods in identification of the pathogen and molecular approaches that have been used for the identification of Colletotrichum species. Pathogenetic variation and population structure of the causal agents of chilli anthracnose along with the current taxonomic status of Colletotrichum species are discussed. Future developments leading to the disease management strategies are suggested.      

Multisensory and unisensory approaches to communicating with deaf children

The history of and current controversy in education of the hearing impaired between advocates of unisensory (audition only) and multisensory (audition, vision and touch) approaches to communication for learning and socialisation for hearing-impaired children is described. Arguments from developmental and perceptual theory, information processing, early intervention pedagogy and an examination of the evidence claimed to support the superiority of unisensory approaches is presented from which the authors conclude that the superiority of multisensory approaches is well established and these should be the methods of choice in communicating with hearing-impaired children.     

The symbiotic roles of action research,lesson study and learning study seen in a social–emotional intervention for males with behavioural needs

ABSTRACT

To help a group of nine adolescent boys with behavioural needs improve their social-emotional skills, the researcher designed and conducted a longitudinal intervention at a public secondary school in British Columbia. In order to complete this task, the researcher drew on the various strengths of action research, lesson study and learning study. Together their distinct attributes acted as an organizational framework and were seen to provide an effective and robust approach to school-based research. The action research component of the study ensured that the intervention had a deep understanding of the problems facing male students with behavioural needs, that stakeholders’ voices were considered in the research and that the personal role of the researcher was acknowledged. Learning study established positive masculinity as the intervention’s primary object of learning; and it helped influence the content and approach of individual sessions. Finally, lesson study’s fluid and collaborative approach to assessment allowed for ongoing guidance and a more comprehensive and nuanced understanding of the study’s results. Although there are similarities between action research, learning and lesson studies, the research discussed in this article demonstrates the efficacy and benefit in allowing their distinctive strengths to be used in conjunction for a longitudinal intervention.     

Index for Volume 54 (1983)

Abstract

The purpose of this study was to develop a regression equation to predict maximal oxygen uptake (VO₂max) based on nonexercise (N-EX) data. All participants (N= 100), ages 18–65 years, successfully completed a maximal graded exercise test (GXT) to assess VO₂max (M= 39.96 mL·kg ^-1· min ^-1 , SD = 9.54). The N-EX data collected just before the maximal GXT included the participant's age; gender; body mass index (BMI); perceived functional ability (PFA) to walk, jog, or run given distances; and current physical activity (PA-R) level. Multiple linear regression generated the following N-EX prediction equation (R = .93, SEE = 3.45 mL·kg ^-1· min ^-1 , %SEE= 8.62): VO₂max (mL·kg ^-1· min ^-1 ) = 48.0730 + (6.1779 x gender; women = 0, men = 1) – (0.2463 x age) – (0.6186 x BMI) + (0.7115 x PFA) + (0.6709 x PA-R). Cross validation using PRESS (predicted residual sum of squares) statistics revealed minimal shrinkage (R _p = .91 and SEE _p = 3.63 mL·kg ^-1· min ^-1 ); thus, this model should yield acceptable accuracy when applied to an independent sample of adults (ages 18–-65 years) with a similar cardiorespiratory fitness level. Based on standardized β-weights, the PFA variable (0.41) was the most effective at predicting VO₂max followed by age (-0.34), gender (0.33), BMI (-0.27), and PA-R (0.16). This study provides a N-EX regression model that yields relatively accurate results and is a convenient way to predict VO₂max in adult men and women.     

Careers in dairy: adolescents perceptions and attitudes

ABSTRACT

Purpose: This paper examines the attitudes and perceptions of Irish adolescents towards potential careers in dairy farming within the context of generational renewal for a dynamic agri-food sector.

Design/methodology/approach: The lens of occupational choice theory was used to present a framework within which potential careers are considered. A questionnaire-survey was undertaken with 490 Irish adolescents (15–18 yrs).

Findings: While parents have the greatest influence on the career choices of adolescents, there was a positive correlation between studying agricultural science in school and considering an agricultural related career. Adolescent's attitudes towards careers in dairy farming were subject to perceptions about gender, farm ownership, potential income and work-life balance. There was a high degree of openness to gaining work experience on dairy farms.

Practical implications: With an increased interest in agricultural science in second level schools in Ireland, the findings point to opportunities to influence awareness and attitudes of adolescents and their parents about career possibilities in dairy farming and to encourage both familial and non-familiar generational renewal.

Theoretical implications: The paper contributes an understanding of career choices and aspirations in adolescence to add to the growing body of literature on generational renewal in farming.

Originality/value: This paper focuses specifically on dairy farming, providing more detailed information about adolescents’ perceptions of dairy farming careers. The study highlights the positive relationship between studying agricultural science in school and subsequent interest in agricultural related careers. The results indicate that generation renewal in agriculture can be enhanced by giving increased attention to agriculture in school curricula.