sport skill acquisition

This study examined whether an 8-week progressive temporal-occlusion training program improves early anticipation of forehand drop-shot direction in badminton. Seventy-eight university students with systematic badminton training experience were randomly assigned to a progressive temporal-occlusion group, a full-information active-control group, or a regular-activity control group ( n = 26 per group); 72 completed both pretest and posttest. The two video-training groups trained twice weekly for 8 weeks. Anticipation was assessed at four occlusion points: 80 ms before racket–shuttle contact, 40 ms before contact, at contact, and 40 ms after contact. Shot-direction anticipation accuracy was the primary performance measure, and correct-response reaction time (RT) was the secondary measure. Data were analyzed using mixed repeated-measures ANOVA, planned comparisons, and trial-level sensitivity analyses. Accuracy showed a significant group × test-session interaction ( p < 0.001), whereas the group × test-session × occlusion-point interaction was not significant ( p = 0.185). Relative to the active-control group, the progressive group showed larger accuracy gains at 40 ms before contact and at contact (Holm-adjusted p = 0.048 and 0.009, respectively). For correct-response RT, the three-way interaction was significant ( p < 0.001), with larger reductions in the progressive group at 80 ms before contact, 40 ms before contact, and at contact (all Holm-adjusted p = 0.013). Thus, the progressive temporal-occlusion training program produced additional improvements in selected anticipation measures beyond those obtained with dose-matched full-information video practice. The additional accuracy gains were observed at 40 ms before contact and at contact, whereas additional RT reductions extended from 80 ms before contact to contact. Because the three-way interaction for accuracy was not significant, the apparent temporal specificity of the accuracy gains should be interpreted cautiously.

This exploratory cluster-randomized pilot study investigated the individual and combined effects of Video Self-Modeling (VSM) and preferred music during warm-up on physical, technical, and psychological performance following a nine-week shot-put learning program in secondary school students. Eighty students, nested within four intact classes, were allocated to four conditions at the class level (one class per condition): neutral self-talk with no music (control), VSM only, preferred music only (PM), and combined VSM plus preferred music (CVSMPM). Shot-put distance, technical execution, rating of perceived exertion, feeling scale, and situational motivation (SIMS) were assessed. Physical performance improved significantly in all groups. Because randomization occurred at the class level with a single class per condition, intervention and class-level effects cannot be statistically separated; results are reported as descriptive contrasts. Descriptive contrast analysis showed medium-to-large effect-size differences favoring the combined intervention over control on physical and technical performance at formative (0.79 < d < 1.50) and summative assessments (0.62 < d < 1.32). Feeling-scale scores increased with large-to-very-large effects in CVSMPM and PM (1.34 < d < 2.02), and situational motivation improved with medium-to-large effects in CVSMPM (0.87 < d < 1.69) and PM (0.79 < d < 1.21). CVSMPM showed the most consistent pattern of medium-to-large effect-size differences in motor skill acquisition, technical proficiency, and psychological engagement relative to the other conditions. Given the cluster design and exploratory analyses, these findings should be regarded as preliminary and hypothesis-generating.

این مطالعه مقدماتی به‌صورت خوشه‌ای و تصادفی‌شده، تأثیرات فردی و ترکیبی مدل‌سازی ویدیویی از خود (VSM) و موسیقی ترجیحی در حین گرم‌کردن را بر عملکرد جسمانی، فنی و روان‌شناختی پس از یک برنامه نه‌هفته‌ای آموزش پرتاب وزنه در دانش‌آموزان دبیرستانی بررسی کرد. هشتاد دانش‌آموز، که در چهار کلاس مجزا قرار داشتند، در سطح کلاس به چهار وضعیت تخصیص یافتند (هر کلاس یک وضعیت): گفتار درونی خنثی بدون موسیقی (گروه کنترل)، فقط VSM، فقط موسیقی ترجیحی (PM) و ترکیب VSM به‌علاوه موسیقی ترجیحی (CVSMPM). فاصله پرتاب وزنه، اجرای فنی، ارزیابی ادراک‌شده از تلاش، مقیاس احساس و انگیزش موقعیتی (SIMS) مورد ارزیابی قرار گرفت. عملکرد جسمانی در همه گروه‌ها به‌طور معناداری بهبود یافت. از آنجا که تصادفی‌سازی در سطح کلاس و با یک کلاس برای هر وضعیت انجام شد، تأثیرات مداخله و سطح کلاس از نظر آماری قابل تفکیک نیست؛ نتایج به‌صورت مقایسه‌های توصیفی گزارش شده‌اند. تحلیل مقایسه‌های توصیفی تفاوت‌هایی با اندازه اثر متوسط تا بزرگ را به نفع مداخله ترکیبی نسبت به گروه کنترل در عملکرد جسمانی و فنی در ارزیابی‌های تکوینی (0.79 < d < 1.50) و نهایی (0.62 < d < 1.32) نشان داد. امتیازات مقیاس احساس با اندازه اثر بزرگ تا بسیار بزرگ در گروه‌های CVSMPM و PM افزایش یافت (1.34 < d < 2.02) و انگیزش موقعیتی با اندازه اثر متوسط تا بزرگ در CVSMPM (0.87 < d < 1.69) و PM (0.79 < d < 1.21) بهبود یافت. گروه CVSMPM الگوی ثابتی از تفاوت‌های اندازه اثر متوسط تا بزرگ در اکتساب مهارت حرکتی، مهارت فنی و درگیری روان‌شناختی نسبت به سایر وضعیت‌ها نشان داد. با توجه به طراحی خوشه‌ای و تحلیل‌های اکتشافی، این یافته‌ها مقدماتی و فرضیه‌ساز تلقی می‌شوند.