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"relative age effect"

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https://www.readbyqxmd.com/read/28630582/doubly-disadvantaged-the-relative-age-effect-in-poland-s-basketball-players
#1
Krystian Rubajczyk, Kamil Świerzko, Andrzej Rokita
The aim of this study was to identify the relative age effect (RAE) in young Polish male (n = 3849) and female (n = 3419) basketball players aged 14 to 22 years competing in the elite games of the Polish Youth Championships. The distribution of birth dates, body height, players' match statistics, and the results of teams participating in championships were identified. The RAE was observed in male and female group, regardless of players age. Nevertheless, the greatest disproportion in the distribution of dates of birth was found in U16 group of boys (V = 0...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630572/the-role-of-a-relative-age-effect-in-the-7-th-international-children-s-winter-games-2016-and-the-influence-of-biological-maturity-status-on-selection
#2
Lisa Müller, Carolin Hildebrandt, Christian Raschner
The aim of this study was to analyse the role of a relative age effect (RAE) and to investigate the influence of biological maturity status on the RAE at the 7(th) International Children`s Winter Games. The birth dates of all 572 participants (365 males, 207 females) were analysed, and the biological maturity status of 384 athletes (243 males, 141 females) was assessed by the age at peak height velocity (APHV) method. A RAE was present in the total sample (χ(2) = 67.81; p < 0.001), and among both male (χ(2) = 49...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28627293/new-evidence-of-relative-age-effects-in-super-elite-sportsmen-a-case-for-the-survival-and-evolution-of-the-fittest
#3
Benjamin D Jones, Gavin P Lawrence, Lew Hardy
The relative age effect (RAE) describes an overrepresentation of players born early (Q1) in a selection year and is highly prevalent within youth sport pathways. However, a dearth of research has investigated the RAE at the "super-elite" level. The present research assessed the presence of RAE in super-elite performers. Study 1 investigated RAEs in the world's best international Test cricketers (N = 262) over a 20-year period according to a robust and stringent "super-elite" criteria. Results revealed the RAE (Q1) when all disciplines were combined...
June 19, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28577222/relationship-between-the-relative-age-effect-and-lengths-of-professional-careers-in-male-japanese-baseball-players-a-retrospective-analysis
#4
Hiroki Nakata
BACKGROUND: The mechanisms underlying the relative age effect in sport events have been investigated for more than two decades. The present study focused on the relationship between the relative age effect and lengths of professional careers among professional male Japanese baseball players. METHODS: The birth dates of players and lengths of professional careers were collected from an official publication, and data were divided into four quarters (Q1: April-June; Q2: July-September; Q3: October-December; Q4: January-March of the following year) grouped by 3 years...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28426748/tails-of-the-travelling-gaussian-model-and-the-relative-age-effect-tales-of-age-discrimination-and-wasted-talent
#5
John R Doyle, Paul A Bottomley, Rob Angell
The Relative Age Effect (RAE) documents the inherent disadvantages of being younger rather than older in an age-banded cohort, typically a school- or competition-year, to the detriment of career-progression, earnings and wellbeing into adulthood. We develop the Tails of the Travelling Gaussian (TTG) to model the mechanisms behind RAE. TTG has notable advantages over existing approaches, which have been largely descriptive, potentially confounded, and non-comparable across contexts. In Study 1, using data from the UK's Millennium Cohort Study, we investigate the different levels of RAE bias across school-level academic subjects and "personality" traits...
2017: PloS One
https://www.readbyqxmd.com/read/28326044/geographical-variations-in-the-interaction-of-relative-age-effects-in-youth-and-adult-elite-soccer
#6
Christina Steingröver, Nick Wattie, Joseph Baker, Werner F Helsen, Jörg Schorer
Selection biases based on the use of cut-off dates and the timing of athletes' birthdates have been termed relative age effects. These effects have been shown to differentially affect individuals involved in sport. For example, young male soccer players born early in their age group are overrepresented in elite teams while studies in adult soccer indicated potential carry-over effects from talent development systems. This two-study approach focuses on the processes within multi-year age groups in youth and adult elite soccer and on the role of players' age position within the age band with regard to players' birth year and birth month...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28295480/relative-age-effects-in-the-movement-assessment-battery-for-children-2-age-banding-and-scoring-errors
#7
S Veldhuizen, L Rivard, J Cairney
AIM: The Movement Assessment Battery for Children-2 (MABC-2) uses age-grouped scoring, which will result in relative motor functioning being overestimated for some children and underestimated for others. In this paper, we measure these errors and discuss their consequences. METHOD: We pool data from two validation studies to obtain a sample of 278 children assessed with the MABC-2 (mean (SD) age: 5 years, 0 months (9.6 months); 142 female). We used regression to measure the association between standard score and relative age, and used these results to estimate misclassification rates at the MABC-2's recommended thresholds...
March 15, 2017: Child: Care, Health and Development
https://www.readbyqxmd.com/read/28038501/the-impact-of-physical-growth-and-relative-age-effect-on-assessment-in%C3%A2-physical-education
#8
Terje Dalen, Rolf Petter Ingvaldsen, Truls Valland Roaas, Arve Vorland Pedersen, Ingebrigt Steen, Tore Kristian Aune
Physical education (PE) is perhaps the school subject most likely to produce relative age effects (RAE). Like in sports, physical maturity gives students an advantage in PE, which might well be mistaken for superior ability. The aim of the present study is to investigate the extent to which physical growth, measured as height, and RAE reflect the assessment in Norwegian PE. Furthermore, we wanted to examine whether there is any gender differences in the assessment in PE as a function of physical growth and RAE...
May 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28000283/maturational-and-social-factors-contributing-to-relative-age-effects-in-school-sports-data-from-the-london-youth-games
#9
K E Reed, D A Parry, G R H Sandercock
Few studies have investigated whether relative age effects (RAEs) exist in school sport. None have sought to test the competing maturational and social-agent hypotheses proposed to explain the RAE. We aimed to determine the presence of RAEs in multiple school sports and examine the contribution of maturational and social factors in commonplace school sports. We analyzed birth dates of n=10645 competitors (11-18 years) in the 2013 London Youth Games annual inter-school multisport competition and calculated odds ratio (OR) for students competing based on their yearly birth quarter (Q1-Q4)...
December 20, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27879175/identifying-talented-track-and-field-athletes-the-impact-of-relative-age-effect-on-selection-to-the-spanish-national-athletics-federation-training-camps
#10
Javier Brazo-Sayavera, María Asunción Martínez-Valencia, Lisa Müller, Georgios Andronikos, Russell J J Martindale
This study examined the impact of relative age effect (RAE) on selection to the Spanish National Athletics Federation (RFEA) training camps (TC) between 2006 and 2013. Overall, 1,334 selected athletes at U15 years (cadet) and U17 years (juvenile) were compared against 27,711 licensed but unselected athletes for the same age groups. The results highlighted the influential role of the RAE on selection to national level track and field training camp opportunities. Interestingly, this effect was mediated by age and gender, where effects were stronger for both males and younger athletes (U15), with no evidence of RAE for older (U17) female athletes...
November 23, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27780175/player-selection-bias-in-national-football-league-draftees
#11
Kyle S Beyer, David H Fukuda, Michael J Redd, Jeffrey R Stout, Jay R Hoffman
Beyer, KS, Fukuda, DH, Redd, MJ, Stout, JR, and Hoffman, JR. Player selection bias in National Football League draftees. J Strength Cond Res 30(11): 2965-2971, 2016-Relative age effects (RAEs) have been studied as a potential factor associated with player selection bias in numerous sports. However, little research has examined the role of RAEs among National Football League (NFL) draftees. The purpose of the current study was to determine the existence of RAEs in NFL draftees from the last 10 NFL drafts. Draftee birth dates were collected and divided into calendar and scholastic quarters (SQ1-SQ4)...
November 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27747774/does-relative-age-affect-career-length-in-north-american-professional-sports
#12
C Steingröver, N Wattie, J Baker, J Schorer
BACKGROUND: Relative age effects (RAEs) typically favour older members within a cohort; however, research suggests that younger players may experience some long-term advantages, such as longer career length. The purposes of this study were to replicate previous findings on RAEs among National Hockey League (NHL) ice hockey players, National Basketball Association (NBA) basketball players and National Football League (NFL) football players and to investigate the influence of relative age on career length in all three sports...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27669191/influence-of-physical-maturity-status-on-sprinting-speed-among-youth-soccer-players
#13
Robert McCunn, Matthew Weston, John K A Hill, Rich D Johnston, Neil V Gibson
McCunn, R, Weston, M, Hill, JKA, Johnston, RD, and Gibson, NV. Influence of physical maturity status on sprinting speed among youth soccer players. J Strength Cond Res 31(7): 1795-1801, 2017-The relative age effect is well documented with the maturation-selection hypothesis the most common explanation; however, conflicting evidence exists. We observed the birth date distribution within an elite junior soccer academy. The influence of physical maturity status on anthropometric variables and sprinting ability was also investigated...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27504832/biological-maturity-status-strongly-intensifies-the-relative-age-effect-in-alpine-ski-racing
#14
Lisa Müller, Erich Müller, Carolin Hildebrandt, Christian Raschner
The relative age effect (RAE) is a well-documented phenomenon in youth sports. This effect exists when the relative age quarter distribution of selected athletes shows a biased distribution with an over-representation of relatively older athletes. In alpine ski racing, it exists in all age categories (national youth levels up to World Cup). Studies so far could demonstrate that selected ski racers are relatively older, taller and heavier. It could be hypothesized that relatively younger athletes nearly only have a chance for selection if they are early maturing...
2016: PloS One
https://www.readbyqxmd.com/read/27294320/are-the-world-junior-championship-finalists-for-middle-and-long-distance-events-currently-competing-at-international-level
#15
Federico Pizzuto, Matteo Bonato, Gialunca Vernillo, Antonio La Torre, Maria Francesca Piacentini
PURPOSE: The aim of the present study was to analyze how many finalists of the International Association of Athletics Federations (IAAF) World Junior Championships (WJC) in the middle and long-distance track events had dropped out from high-level competitions. METHODS: Starting from 2002, the eight male and the eight female finalists in the middle and long-distance events of six editions of the WJC were followed until 2015 to evaluate how many athletes missed from the IAAF rankings for two consecutive years starting from the year after WJC participation...
August 24, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27242593/relative-age-effects-in-mathematics-and-reading-investigating-the-generalizability-across-students-time-and-classes
#16
Katharina Thoren, Elisa Heinig, Martin Brunner
A child's age in comparison to the age of her or his classmates (relative age) has been found to be an influential factor on academic achievement, particularly but not exclusively at the beginning of formal schooling. However, few studies have focused on the generalizability of relative age effects. To close this gap, the present study analyzes the generalizability across students with and without immigrant backgrounds, across three student cohorts that entered school under a changing law of school enrollment, and across classes...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27238077/age-ordered-shirt-numbering-reduces-the-selection-bias-associated-with-the-relative-age-effect
#17
David L Mann, Pleun J M A van Ginneken
When placed into age groups for junior sporting competition, the relative differences in age between children leads to a bias in who is evaluated as being talented. While the impact of this relative age effect (RAE) is clear, until now there has been no evidence to show how to reduce it. The aim of this study was to determine whether the selection bias associated with the RAE could be reduced. Talent scouts from an elite football club watched junior games and ranked players on the basis of their potential. Scouts were allocated to one of three groups provided with contrasting information about the age of the players: (1) no age information, (2) players' birthdates or (3) knowledge that the numbers on the playing shirts corresponded to the relative age of the players...
April 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27166343/the-role-of-a-relative-age-effect-in-the-12th-winter-european-youth-olympic-festival-in-2015
#18
Lisa Müller, Carolin Hildebrandt, Martin Schnitzer, Christian Raschner
The aim of this study was to define the role of the relative age effect in the 12th Winter European Youth Olympic Festival 2015. The birth dates of all 899 participants and anthropometric data of 655 participants were analyzed. A significant relative age effect was present in the total sample and among the male athletes but not in the female athletes. Additionally, a significant relative age effect was present in strength- and endurance-related sports but not in technique-related sports. Statistically significantly more older athletes won medals...
April 2016: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/27166336/relative-age-effect-in-mind-games-the-evidence-from-elite-chess
#19
Kristijan Breznik, Kris M Y Law
Numerous studies have attempted to investigate the factors affecting superior intellectual performance, and it has been proposed that a possible biological marker for superior intellectual performance is the month of birth. In this study, birth details of chess players were obtained from the official international chess federation website. The rating lists of top junior female chess players ("Girls" category), top junior male chess players ("Boys"), top female chess players ("Female"), and top male chess players ("Male") were collected between July 2000 and August 2015...
April 2016: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/26992834/the-interaction-between-constituent-year-and-within-1-year-effects-in-elite-german-youth-basketball
#20
C Steingröver, N Wattie, J Baker, W F Helsen, J Schorer
The current state of research on relative age effects in basketball shows an uneven picture. These mixed results might be caused by the interaction of constituent year and within-year effects. Our aim was to examine constituent and within-1-year effects in elite German youth basketball. The sample (n = 4400) included players competing in the JBBL (Under-16 first division) and the NBBL (Under-19 first division) from 2011/2012 until 2013/2014. A multi-way frequency analysis revealed an interaction of constituent year effects and within-1-year effects for the JBBL, χ(2) (6, 2590) = 12...
March 19, 2016: Scandinavian Journal of Medicine & Science in Sports
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