The effect of student aid on the duration of study   总被引：1，自引：0，他引：1  

Daniela Glocker 《Economics of Education Review》2011,30(1):177-190

In this paper I evaluate the effect of student aid on the success of academic studies. I focus on two dimensions, the duration of study and the probability of actually graduating with a degree. To determine the impact of financial student aid, I estimate a discrete-time duration model allowing for competing risks to account for different exit states (graduation and dropout) using individual level panel data from the German Socio-Economic Panel (SOEP) for the years 1984-2007. My findings suggest that the duration of study is responsive to the type of financial support a student receives. There are three main results. First, student aid recipients finish faster than comparable students who are supported by the same amount of parental/private transfers only. Second, although higher financial aid does on average not affect the duration of study, this effect is (third) dominated by the increased probability of actually finishing university successfully.  相似文献   

The Development of Scientific Thinking in Elementary School: A Comprehensive Inventory          下载免费PDF全文

Susanne Koerber  Daniela Mayer  Christopher Osterhaus  Knut Schwippert  Beate Sodian 《Child development》2015,86(1):327-336

The development of scientific thinking was assessed in 1,581 second, third, and fourth graders (8‐, 9‐, 10‐year‐olds) based on a conceptual model that posits developmental progression from naïve to more advanced conceptions. Using a 66‐item scale, five components of scientific thinking were addressed, including experimental design, data interpretation, and understanding the nature of science. Unidimensional and multidimensional item response theory analyses supported the instrument's reliability and validity and suggested that the multiple components of scientific thinking form a unitary construct, independent of verbal or reasoning skills. A partial credit model gave evidence for a hierarchical developmental progression. Across each grade transition, advanced conceptions increased while naïve conceptions decreased. Independent effects of intelligence, schooling, and parental education on scientific thinking are discussed.  相似文献   

Is a Proactive Approach to Controlling Legionella in the Environment Justified?     

Daniela Glaar Iv e  Dobrica Ron evi&#x;  Marina &#x;anti&#x;  Arijana Cenov  Dijana Tomi&#x; Lin&#x;ak  Vladimir Mi&#x;ovi&#x;  Draen Lu&#x;i&#x;  Marin Glad  Davor Ljubas  Darija Vuki&#x; Lu&#x;i&#x; 《Food Technology and Biotechnology》2021,59(3):314

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Immersive virtual reality in K-12 and higher education: A 10-year systematic review of empirical research     

Anna Flavia Di Natale  Claudia Repetto  Giuseppe Riva  Daniela Villani 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2006-2033

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Orthographic Neighborhood-Size Effects on the Reading Aloud of Italian Children With and Without Dyslexia     

Chiara Valeria Marinelli  Daniela Traficante  Pierluigi Zoccolotti  Cristina Burani 《Scientific Studies of Reading》2013,17(5):333-349

This study examines the effects of orthographic neighborhood size (N-size) in relationship with word frequency on the reading aloud of children with and without dyslexia whose language has a consistent orthography. Participants included 22 Italian fourth-grade children with dyslexia and 44 age-matched typically developing readers. Children with dyslexia read low-frequency words with high N-size faster than words that had no neighbors; by contrast, typically developing readers showed no N-size effects, irrespective of word frequency. The facilitating effect of N-size on low-frequency word reading in children with dyslexia indicates that they benefit from lexical activation spreading from dense neighborhoods.  相似文献   

Escape From Metaignorance: How Children Develop an Understanding of Their Own Lack of Knowledge     

Michael Rohwer  Daniela Kloo  Josef Perner 《Child development》2012,83(6):1869-1883

Previous research yielded conflicting results about when children can accurately assess their epistemic states in different hiding tasks. In Experiment 1, ninety‐two 3‐ to 7‐year‐olds were either shown which object was hidden inside a box, were totally ignorant about what it could be, or were presented with two objects one of which was being put inside (partial exposure). Even 3‐year‐olds could assess their epistemic states in the total ignorance and the complete knowledge task. However, only children older than 5 could assess their ignorance in the partial exposure task. In Experiment 2 with one hundred and one 3‐ to 7‐year‐olds, similar results were found for children under 5 years even when more objects were shown in partial exposure tasks. Implications for children’s developing theory of knowledge are discussed.  相似文献   

Anthropological status of international calibre speed skaters     

Daniela Sovak  Michael R. Hawes 《Journal of sports sciences》2013,31(3):287-304

The purpose of the study was to determine the anthropological status of elite male and female speed skaters, who were members of the 1985–7 Canadian national teams. The data were compared to those for a control group of University students. The subjects were 8 males and 6 females between 19 and 27 years of age. Nine breadth, 14 girth, 16 length and 15 skinfold measurements were used to compute parameters of body build and the composition; corrected diameters, masses, volumes and fat‐free volumes of the upper arm, forearm, thigh and calf. The speed skaters were found to be similar in body height and mass (males: 178 ± 7.6 cm and 75.5 ± 5.5 kg, females: 165.8 ± 3.8 cm and 62.3 ± 5.8 kg) to the student controls, but they had relatively and absolutely shorter legs and longer trunks. The speed skaters had a lower amount of body fat and higher FFM than their respective student controls and significantly greater relative (P ≤ 0.01) and absolute (P ≤ 0.05) total muscle mass. Analysis of composition within segments indicated that the additional muscle mass is located entirely in the lower extremity. The volume and mass of the thigh was greater (P ≤ 0.01 for the males) than that of the respective controls while the estimated volume of fat was lower. The female speed skaters were found to have more fat on their thigh than either the male speed skaters or male controls. The corrected diameter and mass of the thigh were greater (with respect to the sex) than those reported for 400 m sprinters, marathon runners, cross‐country skiers and figure skaters. The results of the initial assessment were compared to the two consecutive tests of the men's team (conducted 8 and 12 months later) and to one repeated test of the women's team (3 months later). Changes were recorded in skinfold measurements and the muscle component of the thigh.  相似文献   

Foot strike patterns of recreational and sub-elite runners in a long-distance road race     

Peter Larson  Erin Higgins  Justin Kaminski  Tamara Decker  Janine Preble  Daniela Lyons 《Journal of sports sciences》2013,31(15):1665-1673

Abstract

Although the biomechanical properties of the various types of running foot strike (rearfoot, midfoot, and forefoot) have been studied extensively in the laboratory, only a few studies have attempted to quantify the frequency of running foot strike variants among runners in competitive road races. We classified the left and right foot strike patterns of 936 distance runners, most of whom would be considered of recreational or sub-elite ability, at the 10 km point of a half-marathon/marathon road race. We classified 88.9% of runners at the 10 km point as rearfoot strikers, 3.4% as midfoot strikers, 1.8% as forefoot strikers, and 5.9% of runners exhibited discrete foot strike asymmetry. Rearfoot striking was more common among our sample of mostly recreational distance runners than has been previously reported for samples of faster runners. We also compared foot strike patterns of 286 individual marathon runners between the 10 km and 32 km race locations and observed increased frequency of rearfoot striking at 32 km. A large percentage of runners switched from midfoot and forefoot foot strikes at 10 km to rearfoot strikes at 32 km. The frequency of discrete foot strike asymmetry declined from the 10 km to the 32 km location. Among marathon runners, we found no significant relationship between foot strike patterns and race times.  相似文献   

Morphological proportionality in elite age group North American divers     

Daniela Sovak  Michael R. Hawes  Kate Plant 《Journal of sports sciences》2013,31(5):451-465

Abstract

The purpose of this investigation was to describe the morphological parameters that characterize elite age group divers. Comparisons are made to normative age group data from the Coquitlam Growth Study and the constancy of important characteristics from age group to age group is examined. Data were collected on 27 male and 28 female elite divers who participated in the 1990 North American Age Group Diving Championships. Body build, body composition and skinfold corrected diameters were determined from 36 anthropometric parameters and analysed by ANOVA, t‐test and Phantom 2‐scores procedures. All age groups except the 14‐ to 15‐year‐old males were significantly (P ≤0.05) shorter than their norms but recorded higher androgyny index values. The estimated relative muscle mass increased significantly (P≤0.05) with age for males at all ages (40.8–46.3%). The 16‐ to 18‐year‐old females had a significantly (P<0.05) larger relative muscle component compared to the younger age groups (40.1–38.4%). When normalized for height, active tissue development of the extremities was comparable between the sexes except in the forearm. The results indicate that at all age levels short stature is an important characteristic for divers. Analysis of regional active tissue development provides further insight into sport‐specific prerequisites for success at elite levels.  相似文献   

Physical Fitness in Children With Developmental Coordination Disorder     

Nadja Schott  Verena Alof  Daniela Hultsch  Dagmar Meermann 《Research quarterly for exercise and sport》2013,84(5):438-450

The protective effects of physical activity and fitness on cardiovascular health have clearly been shown among normally developed children. However, data are currently lacking pertaining to children with developmental coordination disorder (DCD). The purpose of this study was to examine differences in fitness measures, body composition, and physical activity among children with and without DCD. A cross-sectional design was implemented examining 261 children (118 girls, 143 boys) ages 4–12 years (mean age 7.8 ± 1.9 years). Children were categorized as having DCD if they scored less than or equal to the 5th percentile (n = 71) or between the 6th and the 15th percentile (n = 52) on the Movement Assessment Battery for Children (MABC; Henderson & Sugden, 1992). The typically developing children had scores between the 16th and the 50th percentile (n = 106) or above the 50th percentile (n = 32) on the MABC. The age-related body mass index was used to characterize body composition. Physical fitness was assessed with a 6-min run, 20-m sprint, jump-and-reach test, medicine ball throw, curl-ups, and sit-and-reach test. Physical activity was estimated with a questionnaire. The percentage of overweight and obese children ages 10–12 years were significantly higher in the DCD groups (severe: 50%, moderate: 23.1%) than in the typically developing groups (medium: 5.6%, high: 0%; p < .05). Significant interactions (MABC x Age Group) were found for the fitness tests (p values < .05), except flexibility; whereby specifically, compared to the children in the typically developing groups children in the DCD groups ages 4–6 years achieved significantly worse results for the 20-m sprint, and children of the DCD groups ages 10–12 years achieved significantly worse results for the 6-min run, jump-and-reach test, and medicine ball throw. The study demonstrates poorer performance in fitness tests with high demands on coordination in children with DCD compared to their typically developing peers. Furthermore, the differences in fitness increased with age between children in the DCD groups versus the typically developing groups.  相似文献