Dynamic sitting: Measurement and associations with metabolic health

Dynamic sitting, such as fidgeting and desk work, might be associated with health, but remains difficult to identify out of accelerometry data. We examined, in a laboratory study, whether dynamic sitting can be identified out of triaxial activity counts. Among 18 participants (56% men, 27.3 ± 6.5 years), up to 236 counts per minute were recorded in the anteroposterior and mediolateral axes during dynamic sitting using a hip-worn accelerometer. Subsequently, we examined in 621 participants (38% men, 80.0 ± 4.7 years) from the AGES-Reykjavik Study whether dynamic sitting was associated with cardio-metabolic health. Compared to participants who recorded the fewest dynamic sitting minutes (Q₁), those with more dynamic sitting minutes had a lower BMI (Q₂ = ?1.39 (95%CI = ?2.33;–0.46); Q₃ = ?1.87 (?2.82;–0.92); Q₄ = ?3.38 (?4.32;–2.45)), a smaller waist circumference (Q₂ = ?2.95 (?5.44;–0.46); Q₃ = ?3.47 (?6.01;–0.93); Q₄ = ?8.21 (?10.72;–5.71)), and a lower odds for the metabolic syndrome (Q₂ = 0.74 [0.45;1.20] Q₃ = 0.58 [0.36;0.95]; Q₄ = 0.36 [0.22;0.59]). Our findings suggest that dynamic sitting might be identified using accelerometry and that this behaviour was associated with health. This might be important given the large amounts of time people spend sitting. Future studies with a focus on validation, causation and physiological pathways are needed to further examine the possible relevance of dynamic sitting.     

Student teachers’ discipline strategies: relations with self-images,anticipated student responses and control orientation

Teacher discipline strategies are well documented when it comes to its effects on students and the working climate in the classroom. Although it is commonly acknowledged that for student teachers classroom management is a major concern, student teachers’ use of discipline strategies is largely unknown. In this paper, we examine student teachers’ beliefs in relation to their discipline strategies. Three clusters of discipline strategies are distinguished: sensitive, directive and aggressive discipline strategies. Beliefs that were taken into account are self-images on control and affiliation, control orientation and anticipated student responses on control and affiliation. All participants were student teachers of a one-year teacher education programme for secondary education in the Netherlands. Student questionnaires were used to measure discipline strategies (n?=?2506). Student teachers’ (n?=?104) self-images, control orientation and anticipated student responses were measured with student teacher questionnaires. Results of the multiple regression analyses showed that student teachers’ sensitive and directive discipline strategies are explained best by self-images on control; aggressive discipline strategies are explained best by self-images on affiliation and by control orientation. Apart from the possible academic interest in these particular findings, results are believed to be useful in a practical sense, in particular for teacher education programmes.     

Educational technology on a turning point: curriculum implementation in Flanders and challenges for schools

In this essay, we state that establishing technology curricula by national governments causes a shift in the policy actions of educational technology support: from a technical rationale with a main focus on funding and resources to a pedagogical rationale with a main focus on student competencies. We illustrate our point of view by describing the formal educational technology curriculum recently administered by the government in Flanders. This curriculum is written in terms of attainment targets and has clear implications on the nature of educational technology which is no longer dependent on teachers’ individual efforts or willingness, but is becoming compulsory at the school level. Furthermore, we present two levers that facilitate the integration process of educational technology in general and the realization of technology curricula in particular. Technology coordinators should act more as curriculum managers and change agents, and schools should jointly establish a technology policy plan.

Prior knowledge moderates instructional effects on conceptual understanding of statistics

This study investigated the effects of different teaching and learning methods for statistics for 2 levels of prior knowledge on cognitive load, propositional knowledge, and conceptual understanding. Teaching methods were whether or not to provide students with propositional information, and learning strategies were self-explaining the learning material and explaining in pairs. The results indicate that prior knowledge facilitates propositional knowledge development and leads to differential effects of teaching and learning methods on conceptual understanding: Only low prior knowledge students profit from additional information in the learning task and/or explaining in pairs. An implication of these findings is that low prior knowledge students should be guided into the subject matter by means of working in pairs on learning tasks that comprise additional information. Once students have developed more knowledge of the subject matter, they should be stimulated to work individually on learning tasks that do not comprise additional information.     

Improving digital skills for the use of online public information and services

There are recent indications regarding the use of online public services that force the government to focus on the more refined conceptualizations digital divide research has produced. This paper addresses one of the factors that appears to be important in several conceptualizations of how to approach the digital divide; the differential possession of so-called digital skills. The problem of being short of skills becomes urgent when governments suppose that citizens are able to complete about every task on the Internet. Operational definitions for operational, formal, information and strategic skills are used to measure the Internet skills of the Dutch population at large, by giving 109 subjects nine government related assignments to be accomplished on the Internet. Subjects were recruited following a two step approach; randomly select a sample from the book/list of fixed telephony subscribers, followed by drawing a selective quota sample for the strata of gender, age and educational level. The results indicate that on average 80% of the operational skill Internet tasks, 72% of formal Internet skills tasks, 62% of the information Internet skills tasks and 22% of strategic Internet skills tasks assigned have been successfully completed. The Dutch government's expectation that every citizen with an Internet connection is able to complete the assignments following tasks the government thinks every Internet user can perform, clearly is not justified. The article provides two types of policy recommendations to change this state of affairs. Recommendations for improving government websites and for improving the skill levels of Dutch citizens are suggested.     

Writing with peer response using different types of genre knowledge: Effects on linguistic features and revisions of sixth-grade writers

Effects of peer response using instruction in genre knowledge on the writing of 140 sixth-grade students are investigated. In one condition students were taught specific genre knowledge involving functions of linguistic indicators of time and place. In another condition students were taught more general aspects of communicative writing. Both conditions were compared with a baseline control, receiving regular writing education. Students were randomly assigned within classrooms to each of the three conditions. The use of indicators of time and place was positively related to writing quality. Furthermore, strong effects of the specific genre knowledge condition on the use of these linguistic features in writing and revision were found. Findings indicate that instruction in specific genre knowledge is a valuable addition to writing with peer response.     

Social Media Research: An Assessment of the Domain's Productivity and Intellectual Evolution

The purpose of this study is to conduct a bibliographic investigation and meta-analysis of the full body of social media scholarship produced over eight years, since the domain's emergence in 2004. A total of 610 journal and conference papers were carefully reviewed and subjected to bibliometric and meta-analysis techniques. A number of research questions pertaining to country, institutional, and individual productivity, as well as research design and data practices in the social media field, were proposed and answered. Our results reveal two main challenges faced by the field. First, the social media domain displays limited intellectual diversity in terms of productive and impactful actors—individual, institutions, and countries—as well as publications that have hitherto skewed the domain's focus in a limited direction. Second, the research design approaches and data practices characterizing the domain seem to reflect methodological singularity characterized by a strong tendency for cross-sectional, individual-level, survey or case-based studies. Furthermore, speculative and anecdotal evidence, based on personal opinions and armchair hypotheses, is extremely widespread and stand in the way of the domain's methodological and theoretical advancement. These challenges not only help to improve one's understanding of the identity and intellectual core of social media as a distinct scientific field but can also further prompt academic debate and careful (re)examination of the domain's scholarly practices and assumptions to ensure its future advancement in the most productive manner.