CRITERION VALIDITY OF A VOLLEYBALL SERVE-SPECIFIC CORE SELF-EVALUATIONS SCALE: RELATIONSHIP BETWEEN SERVE EFFICACY, EFFECTIVENESS AND SELF-ASSESSMENT IN INFANT FEMALE BRAZILIAN ATHLETES

ABSTRACT The aim of this study was to evaluate the relationship between self-assessment of volleyball serves and the effectiveness and efficacy of this skill. Two female volleyball teams of the infant category, with a mean age of 14.63 ± 0.5 years and a playing experience of 4.92 ± 1.87 years, participated in the study. A Volleyball Serve-Specific Self-Assessment Scale was applied and technical scout of the serve was performed. The results showed differences in effectiveness between team A (37.26 ± 19.38) and team B (53.89 ± 14.18) (p = 0.02) and in efficacy between team A (91 50 ± 5.51) and team B (96.21 ± 4.46) (p = 0.02). There was also a difference in self-assessment between team A (45.20 ± 5.11) and team B (41.78 ± 3.19) (p = 0.05). A moderate correlation (r = 0.65, p = 0.00) was observed between self-assessment and years of practice in both teams. In conclusion, the team that won first place was more effective and efficacious in executing the serve.

摘要
本研究旨在评估排球发球自我评估与该技术的有效性及效能之间的关联。本研究纳入两支幼儿组女子排球队，受试者平均年龄为14.63±0.5岁，平均打球年限为4.92±1.87年。研究采用排球发球专项自我评估量表（Volleyball Serve-Specific Self-Assessment Scale），并对发球动作开展了技术评测。结果显示，A队（37.26±19.38）与B队（53.89±14.18）的发球有效性存在显著差异（p=0.02）；两队的发球效能分别为A队（91.50±5.51）、B队（96.21±4.46），二者亦存在显著差异（p=0.02）。此外，A队（45.20±5.11）与B队（41.78±3.19）的自我评估得分同样存在显著差异（p=0.05）。两支队伍的自我评估得分与打球年限之间均呈中等程度相关（r=0.65，p=0.00）。综上，获得第一名的队伍在发球执行上具备更高的有效性与效能。