Multitasking during Web search sessions

A user’s single session with a Web search engine or information retrieval (IR) system may consist of seeking information on single or multiple topics, and switch between tasks or multitasking information behavior. Most Web search sessions consist of two queries of approximately two words. However, some Web search sessions consist of three or more queries. We present findings from two studies. First, a study of two-query search sessions on the AltaVista Web search engine, and second, a study of three or more query search sessions on the AltaVista Web search engine. We examine the degree of multitasking search and information task switching during these two sets of AltaVista Web search sessions. A sample of two-query and three or more query sessions were filtered from AltaVista transaction logs from 2002 and qualitatively analyzed. Sessions ranged in duration from less than a minute to a few hours. Findings include: (1) 81% of two-query sessions included multiple topics, (2) 91.3% of three or more query sessions included multiple topics, (3) there are a broad variety of topics in multitasking search sessions, and (4) three or more query sessions sometimes contained frequent topic changes. Multitasking is found to be a growing element in Web searching. This paper proposes an approach to interactive information retrieval (IR) contextually within a multitasking framework. The implications of our findings for Web design and further research are discussed.     

Should we welcome robot teachers?

Current uses of robots in classrooms are reviewed and used to characterise four scenarios: (s1) Robot as Classroom Teacher; (s2) Robot as Companion and Peer; (s3) Robot as Care-eliciting Companion; and (s4) Telepresence Robot Teacher. The main ethical concerns associated with robot teachers are identified as: privacy; attachment, deception, and loss of human contact; and control and accountability. These are discussed in terms of the four identified scenarios. It is argued that classroom robots are likely to impact children’s’ privacy, especially when they masquerade as their friends and companions, when sensors are used to measure children’s responses, and when records are kept. Social robots designed to appear as if they understand and care for humans necessarily involve some deception (itself a complex notion), and could increase the risk of reduced human contact. Children could form attachments to robot companions (s2 and s3), or robot teachers (s1) and this could have a deleterious effect on their social development. There are also concerns about the ability, and use of robots to control or make decisions about children’s behaviour in the classroom. It is concluded that there are good reasons not to welcome fully fledged robot teachers (s1), and that robot companions (s2 and 3) should be given a cautious welcome at best. The limited circumstances in which robots could be used in the classroom to improve the human condition by offering otherwise unavailable educational experiences are discussed.     

Median measure: an approach to IR systems evaluation

In this paper results from three studies examining 1295 relevance judgments by 36 information retrieval (IR) system end-users is reported. Both the region of the relevance judgments, from non-relevant to highly relevant, and the motivations or levels for the relevance judgments are examined. Three major findings are studied. First, the frequency distributions of relevance judgments by IR system end-users tend to take on a bi-modal shape with peaks at the extremes (non-relevant/relevant) with a flatter middle range. Second, the different type of scale (interval or ordinal) used in each study did not alter the shape of the relevance frequency distributions. And third, on an interval scale, the median point of relevance judgment distributions correlates with the point where relevant and partially relevant items begin to be retrieved. The median point of a distribution of relevance judgments may provide a measure of user/IR system interaction to supplement precision/recall measures. The implications of investigation for relevance theory and IR systems evaluation are discussed.     

A quantitative investigation of prospective teachers’ hopes and their motivational forces

The present study aimed to investigate the diverse aspects of prospective teachers’ dispositional hopes, teaching-specific hopes, and their sources, as well as to explore whether these would significantly predict their preparation for the teaching profession. A total of 851 prospective teachers voluntarily participated in the study. A series of confirmatory factor analyses, multiple regression analyses, and structural equation modeling analyses were conducted to answer the research questions appropriately. The results showed that prospective teachers’ dispositional hopes can be examined based on four factors (i.e. active hope, passive hope, internal sources, and external sources), whereas their teaching-specific hopes can be examined based on seven factors (i.e. student motivation, student development, student achievement, teaching, relationships with students, internal sources, and external sources). The results also demonstrated that the teaching-specific hopes in relation to student development, relationships with students, teaching, and their external sources significantly motivated prospective teachers to be involved in a number of activities related to teaching during teacher education.     

Enrolment,content and assessment: a review of examinable senior secondary (16–19 year olds) physical education courses: an international perspective

Senior secondary physical education courses for certification continue to attract increasing student enrolments amidst international concerns for the state and status of physical education in schools. Curricula analysis of senior secondary physical education has typically focussed on courses in local contexts. This review aims to contribute to the current discussion around physical education curricula through a document analysis of 15 senior secondary physical education courses for certification. Results from the analysis of curricula documents reveal similarities in subject aims, objectives and rationales, subject specific content and assessment. Senior secondary physical education is firmly based in both the biophysical and sociocultural fields of study and draws on a broad range of disciplines from which to study human movement. The stated rationales of the courses reviewed suggested that an understanding of the complex interrelationships between content areas underpins senior secondary physical education; however content was mostly prescribed in stand-alone units. This review identified more similarities than differences in content and assessment practices in senior secondary physical education, a point of distinction between the courses reviewed was those that assess physical performance and those that do not. Internal assessment provided for a variety of tasks to determine student learning, however, external assessment was dominated by a written examination.     

Correction to: Externalizing Behavior Problems and Low Academic Achievement: Does a Causal Relation Exist?

Educational Psychology Review -     

Teachers and ICT: current use and future needs

In Scotland, ICT is clearly integral to the existing curriculum in primary and secondary education, see, for example, the 5–14 Development Programme or Higher Still in which information technology is identified as one of the core skills areas (HSDU, 1998). In light of current UK-wide developments such as the National Grid for Learning (NGfL) and the New Opportunities Fund (NOF) funded training in ICT for teachers and librarians, it is all the more important to understand teachers' ICT skills and knowledge needs, to discover their priorities for future development and to establish what will encourage teachers to adopt ICT where appropriate in their professional lives as classroom practitioners, as planners and managers and as learners. An investigation of the ICT skills and knowledge needs of teachers working in Scotland was therefore commissioned by the Scottish Office and completed by the authors. This paper reports on that study indicating relatively low use of ICT and a number of key issues which have implications for teacher training and development. The full report is available on the Scottish Executive website (http://www.scotland.gov.uk/).     

External ankle taping does not alter lower extremity side-step cut and straight sprint biomechanics in young adult males

Abstract

Lateral ankle sprains (LAS) are one of the most common musculoskeletal injuries and as a response, clinicians often use external ankle taping prophylactically to reduce the prevalence of injuries. External ankle taping techniques have been shown to significantly reduce passive ankle range of motion; however, there is limited research on the effects of external ankle taping on lower extremity kinematics or kinetics during sport specific tasks. Therefore, our objective was to compare the effects of external ankle taping on ankle, knee and hip kinematics and kinetics compared to no taping during an anticipated sidestep cutting task and a straight sprint task. We conducted a cross-over laboratory study with 16 healthy males. Three-dimensional kinematics and kinetics were collected with a motion capture system and in-ground force plate during 5 trials of a sprint and anticipated side-step cut with or without external ankle taping. Group means and associated 90% confidence intervals were plotted across 100 data points for each task, significance being identified when the confidence intervals did not overlap for three consecutive data points. No significant kinetic or kinematic differences were identified between conditions for the tasks. External ankle taping does not influence lower extremity biomechanics during a control cutting task.