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1.
手反应时测量可靠性的研究 总被引：1，自引：0，他引：1
本研究采用实验及统计分析法 ,对 44名体院学生的手反应时分别用不同重复测量次数进行多次测量 ,用积差相关法、单因素方差分析等方法对测量数据的可靠性及相关系数用exce17.5软件进行统计分析。结果表明 :手反应时重复测量的最佳次数是 15次 ,取值的最好方法是剔除 5次最大值和 5次最小值计算平均值。可靠性系数可达到 0 95 相似文献
2.
研究采用实验及统计分析法，对山西大学体育学院2002级100名男生的简单反应时分别进行10次测量，使Excel-2000软件单因素方差分析法对测量结果的可靠性进行统计分析和比较研究。在研究中，将测量次数定为10次，是为了达到简化测量方法的目的。结果表明：测量结果的取值方法不同，反应时的可靠性有显著差异。取平均值时，红光、绿光、声音分别测量10次，并且在剔除3个最大值和3个最小值后，可靠性都达到0．93以上。这种取值方法，既可以保持经济性，同时也可以保证较高听可靠性。它与目前国民体质监测工作特点是相符的。 相似文献
3.
采用实验法及数理统计分析法，对431名大学生的感知跳跃进行多次测量，用单因素方差分析法对测量数据的可靠性进行统计分析。结果表明，性别、测量次数和取值方法是影响测量可靠性的因素。建议在运动员选材、机能评定以及全民健身体质测评工作中推广应用文章中的两种方法。 相似文献
4.
反应时测量方法有效性的研究 总被引：5，自引：1，他引：4
研究采用实验及统计分析法，对45名体院学生反应时测量结果的有效性进行定量分析。结果表明：目前常用的用总反应时替代反应时的测量方法的有效性较低（r=0.92），测量结果不能客观反映受试者的反应速度。反应时的测量应先测量受试者的总反应时，然后测量受试者的运动时，最后根据公式：反应时=总反应时-运动时计算出每个受试者的反应时。总反应时和运动时呈低度负相关系数（r=-0.09），说明反应速度和动作速度测量互相不能替代。不同个体之间总反应时变异系数的平均值为23.6％，变异系数高达58.6％。不同个体之间总反应时变异系数与平均值之间的相关系数为0.525。反应能力的评价，应采用反应时和总反应时的变异系数两个指标进行综合评价。 相似文献
5.
体育测量中确定测量次数的研究 总被引：1，自引：0，他引：1
体育测量中,通过增加重复测量次数可减小随机误差,达到提高测量的可靠性。但测量次数的增加,进行测量所付出的代价也会加大,特别是体育测量中还要考虑受试者的生理、心理承受能力及测量客观条件等因素。正确的确定所需测量次数,是进行体育测量首先要解决的实际问题。笔者对确定合适的体育测量次数进行分析和探讨。 相似文献
6.
目的:对正常青年人步态的时空及运动学参数进行可靠性分析,确定步态参数的最佳测试次数,为步态测试次数的标准化提供依据.方法:利用三维运动捕捉系统采集35例正常青年人的步态时空及运动学参数;利用组内相关系数(ICC)对步态参数进行可靠性分析.结果:重复测试4次,正常青年人时空各参数的ICC值均达到0.9以上;重复测试6次,正常青年人运动学各参数的ICC值均达到0.9以上.结论:1)正常青年人每次测试取一个步态周期、重复测试4次能使时空参数达到较高的可靠性;2)同样条件下,正常青年人需要重复测试6次能使运动学参数达到较高的可靠性;3)正常青年人的时空参数的可靠性高于运动学参数. 相似文献
7.
目的：借助可穿戴设备的运动监测、睡眠监测功能,以职业人群为研究对象,探索真实世界条件下运动与睡眠的关系,旨在为更多使用可穿戴设备进行数据采集的干预类研究提供借鉴。方法：招募36名有意愿参加跑步锻炼的企业员工,向其发放可穿戴的智能手表,进行为期5周的测试,分析第1周监测干预前的运动习惯和睡眠情况、第2-5周监测干预期间的运动次数、运动里程和睡眠情况。结果：干预前睡眠数据的采集率为96.03%,干预期睡眠数据的采集率为85.12%。采用重复测量方差分析发现,平均每周运动次数大于或等于三次的员工,睡眠时长有显著上升,每周运动次数两次及以下的员工,睡眠时长无明显变化。结论：可穿戴设备可应用于以职业人群为研究对象的运动及睡眠研究,数据采集率较高。短期研究显示,每周3-7次的跑步运动可以提升职业人群的睡眠时长。 相似文献
8.
测量的可靠性是评价测量质量的重要指标。一般认为测量的可靠性代表测量结果的准确性，这显然是一种误解，尤其是目前应用较多的几种可靠性估价方法似乎无法对可靠性作出正确的估价。为此，对于可靠性及其估价方法应重新加以审视和评析，以期重新认识并有所改善。通过分析和示例结果，可以得出如下结论：测量的可靠性不能完全表达测量结果的准确度；在可靠性定义中一致性不能由相关或相似性替代；在进行差异分析时，应注意重复测量结果的关联属性，并推荐使用非参数检验方法；可靠性分析不能替代误差分析与处理等其他方法。 相似文献
9.
简单反应时测量方法的研究 总被引：1，自引：0，他引：1
运动员的反应速度与运动成绩密切相关，简单反应是各种复杂反应的基础，能反映其潜在能力。因此，简单反应时是诸多运动项目运动员选材的一项重要心理指标。实践中发现用目前的测量方法进行测量，误差很大。通过每班４０人，３组共１２０人分别进行测试次数、测试时间和刺激强度等的实验，并以１０名对象进行验证，综合其它有关研究成果得出：测试时应严格控制激强度；被试在测试前应有一个视、听适应过程；初步确定测试以５０次为宜。并提出了在目前条件下更准确地进行简单反应时测量的测试与评价方法。 相似文献
10.
目的:了解老年人每周运动次数、就诊次数与生命质量的关系。方法:使用问卷调查法,针对65岁以上老年人,获得有效问卷898份,以描述性统计、T检验、单因子变异数分析等统计方法。结果:(1)每周运动5次以上的老年人在生理生命质量(PCS)及心理生命质量(MCS)得分较高,就诊次数较低。(2)与就诊次数相关的是运动次数、性别、年龄、是否参加健康检查、是否罹患慢性病、是否有工作,且达统计学意义。(3)老年人在75岁之后,在就诊次数有突然变差的现象,显示老化的程度在75岁是一个关键点。结论:每周运动3次的老年人,仅在心理生命质量(MCS)有较佳表现,而每周运动五次以上,则在生理生命质量(PCS)及心理生命质量(MCS)上都有较好的表现,同时在就诊次数上也较低,建议老年人采取"低强度、多次数"的运动方式,每周从事5次以上的运动,减少就诊次数,提高生命质量。 相似文献
11.
Adam Hunter Jodie Cochrane Alexi Sachlikidis 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):155-170
The aim of this study was to assess intra-observer and inter-observer reliability of data gathered from a lapsed-time time–motion analysis of canoe slalom competition. The data were collected using a definition set developed in conjunction with elite canoe slalom coaches. Competition runs from four national-standard paddlers in a national selection race were analysed in random order three times by three observers. For each run, observers identified various events specific to canoe slalom, including time taken between gates, touched and missed gates, turn times, major and minor avoidance, rolls, paddle in and out of water times, and stroke classification. The error of measurement was determined for each of these variables. For time taken between gates and turn times, the error was ≤ 0.21 and ≤ 0.39 s for intra-observer and inter-observer analysis, respectively. The error for stroke in and out of water times was ≤ 0.08 and ≤ 0.13 s for intra-observer and inter-observer analysis, respectively. Analysis of stroke classification identification for intra-observer comparisons revealed that 91% of the time identical stroke identification occurred. Inter-observer analysis revealed identical stroke identification was achieved 81% of the time. These reliability data compare favourably with previous time–motion analysis in other sports using fewer variables. 相似文献
12.
Minsoo Kang David R. Bassett Tiago V. Barreira Catrine Tudor-Locke Barbara Ainsworth Jared P. Reis 《Research quarterly for exercise and sport》2013,84(3):445-453
This study was designed to determine the number of days of pedometer monitoring necessary to achieve reliable and valid estimates of a 1-year average of step counts in adults based on either consecutive days (CD) or random days (RD) of data collection. Twenty-three participants (16 women; M age = 38 years, SD = 9.9) wore a Yamax SW 200 pedometer and recorded their step counts for 365 consecutive days. Nine measurement periods of various lengths were selected (2, 3, 4, 5, 6, 7, 14, 21, and 30 days). Each measurement period was randomly selected 10 times each for CD and RD from the larger database. For reliability and validity, two-way intraclass correlation coefficients and mean absolute percentage error (MAPE) were calculated, respectively. The year-round average was considered the criterion measure of the “true” habitual physical activity. Data were analyzed separately by CD and RD. At least 5 CD or 6 RD were necessary to achieve an ICC of .80. A minimum of 30 CD or 14 RD were necessary to achieve an MAPE lower than 10%. These findings provide researchers and practitioners with useful information to determine appropriate measurement length and the method of data selection based on a desired level of reliability and validity. 相似文献
13.
Randall L. Jensen Saravanan Balasubramani Keith C. Burley Daniel R. Kaukola James A. LaChapelle 《Measurement in physical education and exercise science》2013,17(2):130-136
Eight cyclists were photographed with a digital camera for three trials while positioned on their own bicycle wearing their helmet. The positions were different from each other and described as hands on the brake hoods, hands below the curve of the brake hoods on the handlebars, and using aerobars. Twenty-four trials were digitized by two different individuals three times to estimate the inter- and intra-rater reliability of the method. The intraclass correlation coefficient (p < .05) value for the intra-rater (test–retest) reliability was .993, and for inter-rater consistency, it was .976. There were significant differences (p < .05) between digitizers and between trials, apparently due to a learning effect that disappeared by the third trial. Due to small differences between digitizers and trials, caution is recommended when considering the use of this method. 相似文献
14.
The development of talented athletes is a priority for many countries across the world, including China. A validated Chinese 5-factor Talent Development Environment Questionnaire (TDEQ-5) would go some way in helping researchers and practitioners investigate talent development systems within China from an evidence-based perspective. For this purpose, the 25-item English TDEQ-5 was translated to Chinese through a standardised process. The translated scale was then administered to 538 talented Chinese youth athletes. Confirmatory factor analysis revealed adequate model fit of the scale. The internal reliability, concurrent and discriminant validity, and test–retest reliability of the scale were adequately supported. The scale was also invariant across gender. It is recommended that the Chinese TDEQ-5 can be used with confidence in both applied and research settings. 相似文献
15.
Julio Tous-Fajardo Gerard Moras Sergio Rodríguez-Jiménez Albert Busquets Iñigo Mujika 《European Journal of Sport Science》2016,16(8):940-947
The aims of the present study were to assess the validity and reliability of a novel simple test [Five Seconds Power Test (W5″ Test)] for estimating the mean power output during the bench press exercise at different loads, and its sensitivity to detect training-induced changes. Thirty trained young men completed as many repetitions as possible in a time of ≈5?s at 25%, 45%, 65% and 85% of one-repetition maximum (1RM) in two test sessions separated by four days. The number of repetitions, linear displacement of the bar and time needed to complete the test were recorded by two independent testers, and a linear encoder was used as the criterion measure. For each load, the mean power output was calculated in the W5″ Test as mechanical work per time unit and compared with that obtained from the linear encoder. Subsequently, 20 additional subjects (10 training group vs. 10 control group) were assessed before and after completing a seven-week training programme designed to improve maximal power. Results showed that both assessment methods correlated highly in estimating mean power output at different loads (r range: 0.86–0.94; p?R2: 0.78). Good to excellent intra-tester (intraclass correlation coefficient (ICC) range: 0.81–0.97) and excellent inter-tester (ICC range: 0.96–0.99; coefficient of variation range: 2.4–4.1%) reliability was found for all loads. The W5″ Test was shown to be a valid, reliable and sensitive method for measuring mean power output during the bench press exercise in subjects who have previous resistance training experience. 相似文献
16.
Accelerometer-based systems are often used to quantify human movement. This study’s aim was to assess the reliability and validity of the Myotest® accelerometer-based system for measuring running stride kinematics. Twenty habitual runners ran two 60 m trials at 12, 15, 18 and 21 km·h?1. Contact time, aerial time and step frequency parameters from six consecutive running steps of each trial were extracted using Myotest® data. Between-trial reproducibility of measures was determined by comparing kinematic parameters from the two runs performed at the same speed. Myotest® measures were compared against photocell-based (Optojump Next®) and high-frequency video data to establish concurrent validity. The Myotest®-derived parameters were highly reproducible between trials at all running speeds (intra-class correlation coefficient (ICC): 0.886 to 0.974). Compared to the photo-cell and high-speed video-based measures, the mean contact times from the Myotest® were 34% shorter and aerial times were 64% longer. Only step frequency was comparable between systems and demonstrated high between-system correlation (ICC ≥ 0.857). The Myotest® is a practical portable device that is reliable for measuring contact time, aerial time and step frequency during running. In terms of validity, it provides accurate step frequency measures but underestimates contact time and overestimates aerial time compared to photocell- and optical-based systems. 相似文献
17.
Elizabeth Bradshaw Patria Hume Mark Calton Brad Aisbett 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):79-97
Inter-day training reliability and variability in artistic gymnastics vaulting was determined using a customised infra-red timing gate and contact mat timing system. Thirteen Australian high performance gymnasts (eight males and five females) aged 11–23 years were assessed during two consecutive days of normal training. Each gymnast completed a number of vault repetitions per daily session. Inter-day variability of vault run-up velocities (at ‐18 to ‐12 m, ‐12 to ‐6 m, ‐6 to ‐2 m, and ‐2 to 0 m from the nearest edge of the beat board), and board contact, pre-flight, and table contact times were determined using mixed modelling statistics to account for random (within-subject variability) and fixed effects (gender, number of subjects, number of trials). The difference in the mean (Mdiff) and Cohen's effect sizes for reliability assessment and intra-class correlation coefficients, and the coefficient of variation percentage (CV%) were calculated for variability assessment. Approach velocity (‐18 to ‐2 m, CV = 2.4–7.8%) and board contact time (CV = 3.5%) were less variable measures when accounting for day-to-day performance differences, than pre-flight time (CV = 17.7%) and table contact time (CV = 20.5%). While pre-flight and table contact times are relevant training measures, approach velocity and board contact time are more reliable when quantifying vaulting performance. 相似文献