Observations of Player (de)Selection Within a Professional UK Soccer Academy.

Rich J Kite, Mark R Noon, Rhys Morris, Peter Mundy, Neil D Clarke
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Abstract

The present study engaged in an ethnographical observation of the processes used to determine player (de)selections within a professional academy. English category-2 youth academy players (n = 96) from U10-U16 age groups undertook anthropometric profiling (height, mass and somatic maturation) and fitness assessments (10 m, 20 m & 30 m linear sprints, 505-agility test, countermovement and squat jumps). Each players lead coach (n = 4) subjectively graded players utilising a red, amber and green (RAG) rating system on a weekly (current performance) and quarterly (perceived potential) basis, across 25 weeks. A MANCOVA, controlling for maturation, was applied to determine differences in (de)selection by physical performance. Mann Whitney-U tests were used to distinguish difference in (de)selection by subjective grading (weekly and quarterly). The key finding was that quarterly subjective gradings established a higher cumulative score of green ratings in selected players and a low cumulative score of red ratings, and vice versa for deselected players (P ≤ 0.001 to 0.03). However, whilst these findings suggest that quarterly subjective grades of potential were able to provide the best predictors for player (de)selection, the findings should be viewed with caution due to high potential for confirmatory bias.

英国职业足球学院球员选拔观察。
本研究对职业学院中用于确定球员选拔的过程进行了民族志观察。英语2类青年学院球员(n = 96)进行了人体测量分析(身高、体重和身体成熟度)和体能评估(10米、20米和30米直线短跑、505敏捷性测试、反动作和深蹲跳跃)。每位球员的主教练(n = 4) 在25周内,每周(当前表现)和每季度(感知潜力)使用红色、琥珀色和绿色(RAG)评级系统对球员进行主观评分。应用控制成熟的MANCOVA,通过身体表现来确定(去)选择的差异。Mann-Whitney-U测试用于通过主观评分(每周和每季度)来区分(去)选择的差异。关键发现是,季度主观评分在被选中的玩家中建立了较高的绿色评级累积得分,而在被取消选中的玩家则建立了较低的红色评级累积得分(P ≤ 0.001至0.03)。然而,尽管这些发现表明,每季度的主观潜力等级能够为球员(de)选择提供最佳预测因素,但由于验证性偏倚的可能性很高,因此应谨慎看待这些发现。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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