Mini-research Experience in Simple Linear Regression

Within the undergraduate mathematics curriculum, the topic of simple least-squares linear regression is often first encountered in multi-variable calculus where the line of best fit is obtained by using partial derivatives to find the slope and y-intercept of the line that minimizes the residual sum of squares. A markedly different approach from linear algebra, which could also be introduced in multi-variable calculus, obtains the regression line by vector projection. The latter viewpoint offers elegant proof of the equation relating the total, explained and unexplained variations. Consideration of data with the same regression line and correlation opens the door for a “mini-research experience” (MRE). A sequel MRE gives rise to an open Research Experience for Undergraduates topic to analyze reflection sequences and a fundamental connection between complex analysis and regression analysis. A few general guidelines and basic goals for MREs are included for those whose main interest is in undergraduate research.     

Team learning in teacher teams: team entitativity as a bridge between teams-in-theory and teams-in-practice

This study aimed to investigate team learning in the context of teacher teams in higher vocational education. As teacher teams often do not meet all criteria included in theoretical team definitions, the construct team entitativity was introduced. Defined as the degree to which a group of individuals possesses the quality of being a team, this makes it possible to extend team learning research from strict teams-in-theory to various types of teams-in-practice, including teacher teams. The team learning beliefs and behaviours model, including team entitativity, was applied to teacher teams, assessing whether it still stands in these non-strict teams. Data were collected from 105 teams and analysed using multilevel analysis. Results showed that team entitativity, psychological safety and group potency were related to the occurrence of team learning. The latter appeared to be significantly related to team effectiveness, and the formation of mutually shared cognition was found to be a mediating variable in this relationship.     

USING CONSULTATION TO SUPPORT ENGLISH LEARNERS: THE EXPERIENCES OF BILINGUAL SCHOOL PSYCHOLOGISTS

Through semi‐structured interviews, this study explored 11 bilingual school psychologists’ (BSPs) consultation experiences with teachers of English learners (EL) to determine referral concerns, recommendations made, challenges encountered, preparation experiences, and skills most needed. The most common referral issue concerned students’ academic performance and teachers’ attempts to parse out language acquisition difficulties from learning problems. Principal consultation challenges included the scarcity of trained professionals, teacher bias, and the stress of competing school priorities. BSPs relied most on their interpersonal skills and relationship building skills, as well as their knowledge of EL‐focused interventions and their problem identification skills. Recommendations to their monolingual school psychology colleagues included the need to actively seek out a) language and culture resources, b) relevant professional development opportunities, and c) consultations with fellow BSPs. Study limitations and implications are discussed.     

Income and Social Rank Influence UK Children's Behavioral Problems: A Longitudinal Analysis

Children living in low‐income households face elevated risks of behavioral problems, but the impact of absolute and relative income to this risk remains unexplored. Using the U.K. Millennium Cohort Study data, longitudinal associations between Strengths and Difficulties Questionnaire scores and absolute household income, distance from the regional median and mean income, and regional income rank were examined in 3‐ to 12‐year‐olds (n = 16,532). Higher absolute household incomes were associated with lower behavioral problems, while higher income rank was associated with lower behavioral problems only at the highest absolute incomes. Higher absolute household incomes were associated with lower behavioral problems among children in working households, indicating compounding effects of income and socioeconomic advantages. Both absolute and relative incomes therefore appear to influence behavioral problems.     

Les accidents domestiques chez l'enfant handicape et sa famille

Abstract

A review of the literature on integration was commissioned by the Centre for Educational Research and Innovation, Organisation for Economic Cooperation and Development (OECD). This drew on literature from around the globe and was conducted by leading experts in five different countries. The review was organized in terms of categories of disability. This paper introduces the review and sets it in the context of emerging developments in integration. The pros and cons of using a categorical approach are discussed. Attention is drawn to key issues arising in the literature ‐ efficacy, characteristics of effective integration programmes and attitudes to integration. Finally, some pointers for the future development of integration are considered.     

Accuracy and precision of loadsol® insole force-sensors for the quantification of ground reaction force-based biomechanical running parameters

Force plates represent the “gold standard” in measuring running kinetics to predict performance or to identify the sources of running-related injuries. As these measurements are generally limited to laboratory analyses, wireless high-quality sensors for measuring in the field are needed. This work analysed the accuracy and precision of a new wireless insole forcesensor for quantifying running-related kinetic parameters. Vertical ground reaction force (GRF) was simultaneously measured with pit-mounted force plates (1?kHz) and loadsol^® sensors (100?Hz) under unshod forefoot and rearfoot running-step conditions. GRF data collections were repeated four times, each separated by 30 min treadmill running, to test influence of extended use. A repeated-measures ANOVA was used to identify differences between measurement devices. Additionally, mean bias and Bland–Altman limits of agreement (LoA) were calculated. We found a significant difference (p?® devices for these parameters. For these same parameters, the LoA analysis showed that 95% of all measurement differences between insole and force plate measurements were less than 12%, demonstrating high precision of the sensors. However, highly dynamic behaviour of GRF, such as force rate, is not yet sufficiently resolved by the insole devices, which is likely explained by the low sampling rate.     

Testgütekriterien der „Profilanalyse nach Grießhaber“. Evaluation eines Verfahrens zur Erfassung grammatischer Fähigkeiten von ein- und mehrsprachigen Grundschulkindern

A diagnostic goal of the “Profile analysis according to Grießhaber” is the assessment of the grammatical ability to place verbs in German sentences in the correct syntactical position. To evaluate the test quality for the first time, 403 monolingual and multilingual primary school children were randomly assigned to three different test materials: Test material that specifically stimulated the target competence led to the best test results. This indicates a low objectivity of application. In addition, ceiling effects for primary school children were detected, which means that the profile analysis can only slightly differentiate among the grammatical abilities of the children. Retest reliability and objectivity of analysis are also too small. In summary, the test quality of the assessment tool should be improved with respect to all of the test quality criteria considered. Hence, we recommend standardizing the profile analysis better and adding more sensitive diagnostic criteria for primary school aged children. Other aspects of profile analysis, for example the improvement of diagnostic competencies of teachers, are recommended for future research.     

A systematic approach to analysing sports performance

A systematic approach to the analysis of sporting events is discussed. The basic tenet is that objective quantification of critical events is required for a complete analysis. This approach encompasses diverse areas of methodology and research, such as quantification, biomechanics and physiology. The theoretical underpinnings are behavioural, in so far as athletes produce observable behaviour that can be quantified and ultimately changed. Several areas of analysis are linked together in a general framework and each one of these areas is dealt with in detail.     

Time–motion analysis of elite field hockey,with special reference to repeated-sprint activity

Limited information exists about the movement patterns of field-hockey players, especially during elite competition. Time–motion analysis was used to document the movement patterns during an international field-hockey game. In addition, the movement patterns of repeated-sprint activity were investigated, as repeated-sprint ability is considered to be an important fitness component of team-sport performance. Fourteen members of the Australian men's field-hockey team (age 26±3 years, body mass 76.7±5.6?kg, [Vdot]O_2max 57.9±3.6?ml?·?kg^?1?·?min^?1; mean±s) were filmed during an international game and their movement patterns were analysed. The majority of the total player game time was spent in the low-intensity motions of walking, jogging and standing (46.5±8.1, 40.5±7.0 and 7.4±0.9%, respectively). In comparison, the proportions of time spent in striding and sprinting were 4.1±1.1 and 1.5±0.6%, respectively. Our criteria for ‘repeated-sprint’ activity (defined as a minimum of three sprints, with mean recovery duration between sprints of less than 21?s) was met on 17 occasions during the game (total for all players), with a mean 4±1 sprints per bout. On average, 95% of the recovery during the repeated-sprint bouts was of an active nature. In summary, the results suggest that the motion activities of an elite field-hockey competition are similar to those of elite soccer, rugby and Australian Rules football. In addition, the investigation of repeated-sprint activity during competition has provided additional information about the unique physiological demands of elite field-hockey performance.