Finding and using patterns in linear generalising problems

Linear generalising problems are questions which require students to observe and use a linear pattern of the formf(n)=an+b withb0. This study reports responses of students aged between 9 and 13 to these questions, documenting the mathematical models that they select, the strategies used in implementing them and the explanations they give. Substantial inconsistency of choice of model is observed; students who began a question correctly frequently adopted a simpler but incorrect model for more difficult parts of the question. Students who had undertaken a course in problem solving implicitly used a linear model more frequently and consistently and their explanations more often related the spatial patterns and the number patterns. They seemed to understand the relationship between the data and the generalising rule more completely.     

Explicating the relationally attentive approach to conducting engaged communication scholarship

As interest in engaged communication scholarship grows, so does the need for concrete examples of how such research is done. In this essay, we articulate an example of the how by presenting the work of the Purdue Peace Project, a locally led peacebuilding initiative based at Purdue University. We do so by (a) explicating the communicative choices in our approach to engaged scholarship and (b) relating these choices to the impacts that our approach has had on preventing political violence related to a chieftaincy dispute in Keperman (pseudonym), Ghana. Based on qualitative data from multiple time points, we unpack our communicative choices, relate these choices to the realization of engagement goals and setbacks, and reveal multi-level, interdependent, and communicative indicators of impacts. We present what we term the relationally attentive approach to engaged communication scholarship and discuss implications and recommendations for those doing engaged scholarship.     

Middle-class parents’ educational work in an academically selective public high school

This article reports the findings of a study on the nature of parent–school engagement at an academically selective public high school in New South Wales, Australia. Such research is pertinent given recent policies of ‘choice’ and decentralization, making a study of local stakeholders timely. The research comprised a set of interviews with parents and teachers (n = 15), through which parents – all members of the school’s Parents’ and Citizens’ group – theorized and explained their involvement with the school, and teachers spoke about their views on this involvement. Results are organized around three themes: ‘how parents worked to nurture their children’s schooling’, ‘reasons behind parents’ involvement with the school’, and ‘communication and use of parental resources by the school’. Overall it was found that while parents were making significant efforts to involve themselves in the education of their children and with the school more broadly, the reasons for their involvement were not always consistent, but instead revealed a range of motivations for and conceptions of parents’ roles within schools, which at times were at odds with the teachers’. Through this, the study contributes to our understanding of middle-class parent engagement at an unusual and particular type of school.     

Adult learners in the workplace: online learning and communities of practice

Seven in‐employment postgraduate Master's level students in an e‐learning unit participated in this research, designed to identify tensions between participation in a community of learning that was part of their studies, and participation in the communities of practice that they were engaged in at their workplaces. It was hypothesised that participation in both these forms of community in their different contexts may enhance each other, or could potentially have a disrupting effect on each. The research employed an interviewing technique. The students' perceptions of the impact of participation in the one form of community on their participation in the other was mixed, with some suggesting that it was enhancing, and others suggesting the contrary, or that there was no impact. The findings indicate that the enhancing effect of participation in communities of learning relevant to a learner's workplace community of practice occur when the learning tasks are designed to enable negotiation of tasks and collaboration with learners who have similar workplace issues.     

Mothers' time with infant and time in employment as predictors of mother-child relationships and children's early development

This study tested predictions from economic and developmental theories that maternal time with an infant is important for mother-child relationships and children's development, using time-use diaries for mothers of 7- to 8-month-old infants from the National Institute of Child Health and Human Development Study of Early Child Care (N = 1,053). Employment reduced time with infants, but mothers compensated for some work time by decreasing time in other activities. With family and maternal characteristics controlled, time with infants predicted high Home Observation for Measurement of the Environment (HOME) scores and maternal sensitivity, but bore little relation to children's engagement with mothers, secure attachment, social behavior, or cognitive performance from 15 to 36 months. Mothers who spent more time at work had higher HOME scores. Maternal time with infants may reflect maternal characteristics that affect both time allocation and maternal behavior.     

Environmental health and toxicology resources of the United States National Library of Medicine

For over 40 years, the National Library of Medicine's (NLM) Toxicology and Environmental Health Information Program (TEHIP) has worked to organize and to provide access to an extensive array of environmental health and toxicology resources. During these years, the TEHIP program has evolved from a handful of databases developed primarily for researchers to a broad range of products and services that also serve industry, students, and the general public. TEHIP's resources include TOXNET , a collection of databases, including online handbooks, bibliographic references, information on the release of chemicals in the environment, and a chemical dictionary. TEHIP also produces several resources aimed towards the general public, such as the Household Products Database , which helps users explore chemicals often found in common household products, and Tox Town , an interactive guide to commonly encountered toxic substances, health, and the environment. This paper introduces some of NLM's environmental health and toxicology resources.     

Refining the Measure and Dimensions of Social Values of Older People (SVOP)

The research reported in this study concerns older adults from Australia who voluntarily chose to learn the craft of woodturning. The paper examines the literature of adult learning under the themes of presage factors, the learning environment, instructional methods, and techniques for facilitators. The paper then reports on the analysis of two sections of a questionnaire completed by 123 respondents: the first on motivation to learn and the second on learning strategies. The older learners reported using both intrinsic and extrinsic motivation, with intrinsic motivation constructed of both general and specific elements. There were four main learning strategies used: actively seeking knowledge, independent learning, dependent learning, and passively seeking knowledge.     

Step width alters iliotibial band strain during running

This study assessed the effect of step width during running on factors related to iliotibial band (ITB) syndrome. Three-dimensional (3D) kinematics and kinetics were recorded from 15 healthy recreational runners during overground running under various step width conditions (preferred and at least ± 5% of their leg length). Strain and strain rate were estimated from a musculoskeletal model of the lower extremity. Greater ITB strain and strain rate were found in the narrower step width condition (p < 0.001, p = 0.040). ITB strain was significantly (p < 0.001) greater in the narrow condition than the preferred and wide conditions and it was greater in the preferred condition than the wide condition. ITB strain rate was significantly greater in the narrow condition than the wide condition (p = 0.020). Polynomial contrasts revealed a linear increase in both ITB strain and strain rate with decreasing step width. We conclude that relatively small decreases in step width can substantially increase ITB strain as well as strain rates. Increasing step width during running, especially in persons whose running style is characterized by a narrow step width, may be beneficial in the treatment and prevention of running-related ITB syndrome.