Reproducibility of objectively measured physical activity: Reconsideration needed

ABSTRACT

Reliability of accelerometer-determined physical activity (PA), and thus the required length of a monitoring period, appears to depend on the analytic approach used for its calculation. We compared reliability of objectively measured PA using different resolution of data in a sample of 221 Norwegian 2–6-year-old children providing 2–3 valid 14-day periods of accelerometer monitoring (ActiGraph GT3X+) during September–October, January–February, and May–June 2015–2016. Reliability (intra-class correlation [ICC]) was measured for 1–14 days of monitoring across the measurement periods using linear mixed effect modelling. These results were compared to reliability estimated using different resolution of data using the Spearman–Brown formula. The measured reliability improved only marginally with increased monitoring length and levelled off after 5–6 days. Estimated reliability differed substantially when derived from different resolution of data: 3.9–5.4, 6.7–9.2, 13.4–26.7 and 26.3–87.7 days of monitoring was required to achieve an ICC = 0.80 using an hour-by-hour, a day-by-day, a week-by-week and a period-by-period approach, respectively. Reliability could not be correctly estimated from any single resolution of data. We conclude that reconsideration is needed with regard to how reproducibility of objectively measured PA is analysed and interpreted.     

Assessing giftedness with the WISC‐III and the SB‐IV

The Wechsler Intelligence Scale for Children–Third Edition (WISC‐III) and the Stanford‐Binet Intelligence Scale–Fourth Edition (SB‐IV), were administered to 20 gifted children and 20 non‐gifted children to examine the extent of the difference in IQ scores obtained on the two tests and whether order effects were present. Results show that the SB‐IV Composite Score was significantly higher than the WISC‐III Full Scale IQ for both groups. However, for the gifted group, unlike the non‐gifted group, this difference achieved significance only when the SB‐IV was administered first. When either IQ test was administered to the gifted students for the first time, without the confound of a learning influence, there was no significant difference in mean scores. However, when both tests were administered, it was found that the SB‐IV influenced the WISC‐III Full Scale IQ in a downward direction whereas the WISC‐III influenced the SB‐IV Composite Score in an upward direction. © 2002 Wiley Periodicals, Inc.     

Peer Mentoring Styles and Their Contribution to Academic Success Among Mentees: A Person-Oriented Study in Higher Education

The purpose of our study was to explore peer mentoring styles and examine their contribution to academic success among mentees. Data were collected as part of a comprehensive evaluation of a peer mentoring program. The sample consisted of 49 mentors (advanced students) who supported 376 mentees (first year students) in small groups. Indicators for peer mentoring styles were constructed using mentee assessments of mentoring functions and mentor quality, and unobtrusive data gathered in an analysis of online mentoring activities and a content analysis of the quality of the online mentoring activities. Using cluster analyses, three distinct mentoring styles were identified: Motivating master mentoring, informatory standard mentoring, and negative minimalist mentoring. Motivating master mentors were shown to have a positive influence on success in the mentoring program among those mentees who failed two preliminary exams. Implications for the training of peer mentors in higher education are discussed.     

Four fictional views of the future of learning

We are at a critical moment in the history of human learning, and in the history of humans. Learning is very important in our future. With 6 billion people on Earth, going to 9 billion by the middle of the century, current educational systems everywhere at all levels have major problems, probably not solvable with present approaches. In many areas, little education is available. We need new learning modes and structures, and we need them quickly and globally. Creating new learning materials and systems will require great imagination. We need approaches that go beyond current situations. Learning should be greatly improved, less expensive, and available lifelong for all in all subjects. We need a society that focuses on learning, where everyone loves to learn. Solving many of the world's problems, including population, water, violence, health, and environmental destruction, will depend on improving learning. One neglected source of future ideas is fictional accounts of the future of learning. I have long found them helpful in my own thinking and have written about them before. I keep finding new sources of this kind. Some, not mentioned here, are negative views.     

The effects of computer-assisted instruction and locus of control upon preservice elementary teachers' acquisition of the integrated science process skills

The purpose of this study was to determine the effects of computer-assisted instruction (CAI) versus a text mode of programmed instruction (PI), and the cognitive style of locus of control, on preservice elementary teachers' achievement of the integrated science process skills. Eighty-one preservice elementary teachers in six sections of a science methods class were classified as internally or externally controlled. The sections were randomly assigned to receive instruction in the integrated science process skills via a microcomputer or printed text. The study used a pretest-posttest control group design. Before assessing main and interaction effects, analysis of covariance was used to adjust posttest scores using the pretest scores. Statistical analysis revealed that main effects were not significant. Additionally, no interaction effects between treatments and loci of control were demonstrated. The results suggest that printed PI and tutorial CAI are equally effective modes of instruction for teaching internally and externally oriented preservice elementary teachers the integrated science process skills.     

Some Thoughts on Motivation in Sport

This paper examines the content and context of changes in the dominant discourses of physical education. It begins with an analysis of the role of language in publicly defining a role for new professions and defining the nature of that profession's expertise. It then briefly traces the reconstruction of university physical education as sports studies, sport sciences, and sport management and situates these discourses in a political and historical context. The final sections proceed to deconstruct the languages of sport science and sport management, to connect these with struggles to redefine the profession, and to point to some issues for professional education if physical education is to retain any of its traditional humanistic meanings. The argument is grounded in an interview study of technical and administrative professionals in Canadian high performance sport.     

A path-dependence perspective on the adoption of Internet of Things: Evidence from early adopters of smart and connected sensors in the United States

As an integral part of the Internet of Things (IoT), smart and connected sensors are emerging information and communication technologies that collect and transmit real-time data from various urban domains to inform decision-making. While smart sensors and IoT technologies have great potential to transform public service provision, their adoption in the public sector seems to be slow and incremental. Using cross-sectional data of 65 large and mid-sized cities in the United States, we examine what affects local governments' adoption of smart and connected sensors. We propose a path-dependence explanation for the incremental adoption and test if a local government's sensor adoption behavior is shaped by its existing policy priorities and managerial practices in related fields. Our results show that local governments' early adoption of smart sensors is likely to stem from their needs in specific policy domains. We also find that a local government's historical paths on urban sustainability and data-driven decision-making practices can predict its trajectory of sensor deployment, in terms of the scope and the integration of smart sensors across different urban domains. Surprisingly, a local government's e-government progressiveness is not a significant predictor. Our results confirm the incremental change in smart sensor adoption and provide implications for local governments' IoT planning.