scholarly journals Validity and reliability of badminton-specific Reactive Agility TestBadmintona özgü geliştirilen Reaktif Çeviklik Testinin geçerlik ve güvenirliği

2018 ◽  
Vol 15 (1) ◽  
pp. 594
Author(s):  
Mehmet Yıldız ◽  
Uğur Fidan
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Linear Regression Analysis ◽  
Intraclass Correlation ◽  
T Test ◽  
Validity And Reliability ◽  
Test Protocol ◽  
Significant Difference ◽  
Reactive Agility ◽  
The Difference

Many laboratory and field tests are used in the literature to measure agility. The aim of the present study was to investigate the reliability and validity of a new Reactive Agility Test developed for badminton. A total of fourty male [ 20 elites (age: 20.8 ± 2.98 year, height: 174.55 ± 12.03 cm, weight: 65.70 ± 14.41 kg) and 20 sub-elites (age: 22.20±1,51, height: 170.01 ± 05.80 cm, weight: 62.45 ± 6,45 kg)] badminton players took part in the present study. For validity, the difference and relationship between newly developed reactive agility and planned changing direction tests in terms of elit and sub-elit players was examined. In the reliability measurements of test-retest, The Reactive Agility Test at same route was performed twice. Independent sample t test was carried out in order to detect the difference among the groups in the search for validity. The identification of the relations between the two different tests was performed with linear regression analysis. The reliability of test-retest was tried to be estimated with the coefficient of variances and intraclass correlation coefficient, and the Bland Altman method. In addition, a systematic difference between the test and the retest was estimated with the paired t test. At the end of the study, while there was not a significant difference found in the rates of planned changing direction of the elit and sub-elit players, it was detected that reactive agility rates were better in the elit players (7.14±4.85 sec and 9.87±5.07 sec, respectively). Moreover, a high coefficient determination was revealed between two tests (r2: 0.63, p<0.01). In the comparison of test-retest, a high intraclass correlation coefficient (0.930) and a very low coefficient of variances (4.7) were found. Furthermore, it was observed in the Bland Altman graph that a 95% of concordance range of the data obtained between two measurements was a good and narrow concordance.  In conclusion, it was determined that the new developed badminton specific Reactive Agility Test is a valid and reliable measurement method and it is suggested that this test protocol can be used to enhance and monitor reactive agility ability of badminton players.Extended English summary is in the end of Full Text PDF (TURKISH) file. ÖzetLiteratürde çevikliğin ölçülmesi amacıyla birçok laboratuvar ve saha testi kullanılmaktadır. Bu çalışmanın amacı badminton sporuna göre düzenlenmiş Reaktif Çeviklik Testinin güvenirlik ve geçerliğinin araştırılmasıdır. Araştırmaya toplam kırk erkek [20 elit (yaş: 20,8±2,98 yıl, boy uzunluğu: 174,55±12,03 cm, vücut ağırlığı:65,70±14,41 kg) ve 20 sub-elit (yaş: 22,20±1,51 yıl, boy uzunluğu: 170,01±05,80 cm, vücut ağırlığı:62,45±6,45 kg)] badminton oyuncusu katılmıştır. Geçerlik için yeni geliştirilen reaktif çeviklik ile planlı yön değiştirme testlerinin elit ve sub-elit katılımcılar arasındaki istatistiksel karşılaştırması ve ilişkisi analiz edilmiştir. Test-tekrar test güvenirlik ölçümlerinde aynı rotadaki reaktif çeviklik testi birer gün arayla iki kez uygulanmıştır. Geçerlik çalışmasında gruplar arası farkın belirlenmesi için bağımsız değişken t testi ve testler arası ilişkinin fonksiyonel olarak açıklanması ve bu ilişkinin bir modelle tanımlanması için basit doğrusal regresyon analizi yapılmıştır. Test-tekrar test güvenirliği varyasyon katsayısı, sınıf içi korelasyon katsayısı ve Bland Altman metodu ile kestirim edilmiştir. Ayrıca test- tekrar test arasında sistematik bir farkın olup olmadığı eşleştirilmiş t testi ile sınanmıştır.  Çalışma sonunda elit ve sub-elit oyuncuların planlı yön değiştirme bulguları anlamlı bir fark bulunmazken, reaktif çeviklik derecelerinin elit oyuncularda istatistiksel olarak anlamlı farklı (sırasıyla 7,14±4.85 sn ve 9,87±5,07 sn) şekilde düşük olduğu tespit edilmiştir. Bununla beraber her iki test arasında yüksek düzeyde  bir açıklayıcılık katsayısı tespit (r2: 0,63, p<0.01) edilmiştir. Test- tekrar test karşılaştırılmasında yüksek bir sınıf içi korelasyon katsayısı (0,930) ve çok düşük varyasyon katsayısı (4,7) belirlenmiştir. Ayrıca Bland-Altman grafiğinde iki ölçüm arasında elde edilen tüm verilerin %95 uyum aralığının dar ve iyi bir uyum gösterdiği gözlenmiştir. Sonuç olarak,  badminton sporuna göre düzenlenmiş Reaktif Çeviklik Testinin geçerli ve güvenilir bir ölçüm yöntemi olduğu tespit edilmiştir ve badminton oyuncularının reaktif çeviklik becerilerinin geliştirilmesinde ve gelişimlerinin takibinde kullanılabileceği önerilmektedir. 

Variation in Cervical Length over Time during a Single Transvaginal Ultrasound Examination

2018 ◽  
Vol 36 (08) ◽  
pp. 781-784
Author(s):  
Katherine A. Connolly ◽  
Luciana Vieira ◽  
Elizabeth M. Yoselevsky ◽  
Stephanie Pan ◽  
Joanne L. Stone
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Ultrasound Examination ◽  
Transvaginal Ultrasound ◽  
Intraclass Correlation ◽  
Cervical Length ◽  
Linear Mixed Effect Model ◽  
Mixed Effect ◽  
Time Points ◽  
Significant Difference

Objective To quantify the degree of change in cervical length (CL) over a 3-minute transvaginal ultrasound. Study Design We conducted a prospective observational study of nulliparous patients who underwent routine transvaginal CL screening at the time of their second-trimester ultrasound. We recorded CL at four time points (0, 1, 2, 3 minutes) and compared these values to determine the minute-to-minute change within a single patient. Results A total of 771 patients were included. The mean gestational age was 20.8 weeks (±0.84). We used a linear mixed effect model to assess if each minute during the ultrasound is associated with a change in CL. The intraclass correlation coefficient between minute 0 to minute 3 was 0.82 (95% confidence interval: 0.80, 0.84). This indicates that there is a relatively high within-patient correlation in CL during their ultrasound. Additionally, we stratified patients based on their starting CL; the intraclass correlation coefficient remained high for all groups. We additionally compared CL at each minute. Although there is a statistically significant difference between several time points, the actual difference is small and not clinically meaningful. Conclusion The variation in CL over a 3-minute transvaginal ultrasound examination is not clinically significant. It may be reasonable to conduct this examination over a shorter period.

Reproducibility of Toe Pressure Measurements

2009 ◽  
Vol 33 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Neil Cloete ◽  
Clare Kiely ◽  
Mary Paula Colgan ◽  
Naseem Haider ◽  
Sean O'Neill ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Carotid Artery Disease ◽  
Intraclass Correlation ◽  
Repeated Measurements ◽  
Pressure Measurements ◽  
Repeatability Coefficient ◽  
Significant Difference ◽  
Artery Disease ◽  
Toe Pressure

Introduction Ankle/brachial indices are inaccurate in the presence of calcification, and physicians may rely on the measurement of digital pressures. As the population continues to age and with the escalation in type 2 diabetes, the importance of, and reliance on, toe pressure measurements will increase. The aim of this study was to assess the reproducibility of toe pressure measurements in a single vascular laboratory. Methods Repeated ankle/brachial indices and toe pressures were measured in 20 patients (10 with known peripheral vascular disease and 10 with aneurysmal or carotid artery disease but no history of PVD), and 10 control patients. Three measurements were made 48 hours apart. All measurements were made by a single vascular technologist. Reproducibility was assessed by the use of the repeatability coefficient and the intraclass correlation coefficient. Results Ankle/brachial indices ranged from 0.36 to 2.4, toe pressures from 18 mmHg to 173 mmHg, and toe/brachial indices from 0.11 to 1.1. The repeatability coefficient showed no significant difference between measurements ( p > 0.1) and the intraclass correlation coefficient estimates showed high agreement between repeated measurements (0.77–0.99). Bland-Altman plots indicated that the observer variability was equally distributed across the range of pressure measurements. Conclusion These results confirm the intraobserver reproducibility of toe pressure measurements; however, further work is required to demonstrate inter-observer reproducibility.

scholarly journals Validity and reliability of smartphone-based application for chronic ankle instability

2021 ◽  
Vol 28 (9) ◽  
pp. 1-10
Author(s):  
Taelim Yoon ◽  
Jihyun Lee
Keyword(s):  
Medical Device ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Ankle Instability ◽  
Intraclass Correlation ◽  
Validity And Reliability ◽  
Rater Reliability ◽  
Eyes Closed ◽  
Eyes Open ◽  
Cumberland Ankle Instability Tool

Background/aims Ankle instability is one of the most common injuries that can occur during everyday life, sports and exercise. Recently, smartphone accelerometers have been used to measure single leg balance associated with ankle instability, because they are easy to use, inexpensive and can be used in small spaces. Thus, the purpose of this study was to introduce and investigate the intra- and inter-rater reliability of the smartphone accelerometer when assessing ankle instability. Methods A total of 26 individuals who had ankle instability were recruited. The single leg stance balance was measured using a smartphone accelerometer (Accelerometer application) and a force platform (I-Balance) for 5 seconds with their eyes open or their eyes closed. Results In the eyes open position, intra-rater reliability of the smartphone accelerometer was excellent for both raters (intraclass correlation coefficient: 0.87–0.90); and the inter-rater reliability was moderate (intraclass correlation coefficient: 0.71). In the eyes closed position, the intra-rater reliability of the smartphone accelerometer was excellent for both raters (intraclass correlation coefficient: 0.90–0.93); the inter-rater reliability was good (intraclass correlation coefficient: 0.82). Additionally, there were fair positive correlations between the smartphone accelerometer and the Cumberland Ankle Instability Tool, and between the smartphone accelerometer and I-Balance (r=0.33, 0.30 respectively). Conclusions The present study demonstrated excellent intra-rater reliabilities of two raters and moderate to good inter-rater reliabilities. The smartphone accelerometer offers several important advantages as a potential portable medical device to assess ankle instability accurately. Although there was a positive correlation, the relationships between the smartphone accelerometer and Cumberland Ankle Instability Tool and that between the smartphone accelerometer and I-Balance were fair. Future studies should investigate the validity of the smartphone accelerometer as a portable medical device for determining ankle instability.

scholarly journals Pengaruh Diferensiasi Produk Terhadap Minat Beli Konsumen (Studi Kasus Banana Pop Kota Bima)

2020 ◽  
Vol 5 (1) ◽  
pp. 150
Author(s):  
Dessy Sahur Ramdini ◽  
Ismunandar Ismunandar
Keyword(s):  
Product Differentiation ◽  
Linear Regression Analysis ◽  
Study Data ◽  
T Test ◽  
Coefficient Of Determination ◽  
Target Market ◽  
Simple Linear Regression ◽  
Validity And Reliability ◽  
Literature Study ◽  
Significant Difference

Consumers As A Target Market Have Sufficient Preferences Regarding The Products They Buy. These Products Must Be Unique So That Competitors Are Difficult To Imitate. Therefore The Purpose Of This Study Is To Determine Whether There Is An Influence And Positive And Significant Difference Between Product differentiation On Consumer Purchase Interest In Banana Pop City Of Bima. The Research Method Used In This Study Is The Associative Method. The Technique Of Determining The Sample Uses The Unknown Population With The Formula: Number Of Samples = Number Of Indicators 10 = 10 X 10 = 100, With A Sample Size Of 100 Respondents. Data Collection Techniques Are Observation, Questionnaire / Questionnaire, Literature Study. Data Analysis Techniques Using Simple Linear Regression Analysis, Simple Correlation Coefficient, Coefficient Of Determination, T Test With Spss 20 For Windows. The Results Of The Study Stated That The Validity And Reliability Tests Stated Validity And Reliability For All Data. In The Test Significant Test (T Test) States With The Value Ttable > Tcount (1.984 > -1819) And Sig Value 0.072> 0.05, So It Falls On The Rejection Ha Region Which Means H0 Is Rejected, Then It Can Be Interpreted That There Is No Influence Positive And Significant Between Product Differentiation Against Consumer Buying Interest In Banana Pop City Of Bima.

scholarly journals Komparasi Pelaksanaan Supervisi Akademik Kepala Sekolah di SMKN 1 Padang Gelugur dengan SMKN 1 Rao Selatan

2021 ◽  
Vol 2 (2) ◽  
pp. 236-242
Author(s):  
Vovi Tridian Ulfah ◽  
Yulianto Santoso ◽  
Yulianto Santoso ◽  
Rifma Rifma ◽  
Ermita Ermita
Keyword(s):  
Data Analysis ◽  
Data Collection ◽  
T Test ◽  
Teacher Professionalism ◽  
Learning Activity ◽  
Validity And Reliability ◽  
Learning Evaluation ◽  
Significant Difference ◽  
The Difference

Academic Supervision is a series of activities to assist in developing teacher professionalism in the implementation of learning with students carried out by leaders in schools, namely the principal. Academic supervision activities are carried out to help teachers improve learning activity planning, learning implementation, learning evaluation, and learning device preparation. This study aims to determine the implementation of the principal's academic supervision and see whether there is a significant difference in the implementation of the principal's academic supervision at SMKN 1 Padang Gelugur with SMKN 1 Rao selatan. This type of research is comparative descriptive and data collection is done by distributing questionnaires that have been tested for their validity and reliability. Before the data were analyzed, the data had been tested for normality and homogeneity and then performed the t-test to determine the difference value. Acquisition of data analysis is 1) academic supervision planning obtained 82.27% with the effective category. 2) the implementation of academic supervision obtained 79.34 in the quite effective category. 3) feedback and follow-up from the results of academic supervision obtained 75.2% including in the quite effective category. After testing the hypothesis using the SPSS application, namely the t-test, the result was that there was a difference in the implementation of the principal's academic supervision at SMKN 1 Padang Gelugur and SMKN 1 Rao Selatan because t count (2.154) <from t table (2.66). Based on the research results, the implementation of the principal's academic supervision at SMKN 1 Padang Gelugur was 1.08% more effective than SMKN 1 Rao Selatan.

scholarly journals Validity and reliability of the Questionnaire for Compliance with Standard Precaution

2015 ◽  
Vol 49 (0) ◽  
Author(s):  
Marília Duarte Valim ◽  
Maria Helena Palucci Marziale ◽  
Miyeko Hayashida ◽  
Fernanda Ludmilla Rossi Rocha ◽  
Jair Lício Ferreira Santos
Keyword(s):  
Health Care ◽  
Construct Validity ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Health Care Facilities ◽  
Validity And Reliability ◽  
Standard Precautions ◽  
Standard Precaution ◽  
Care Facilities

ABSTRACT OBJECTIVE : To evaluate the validity and reliability of the Questionnaire for Compliance with Standard Precaution for nurses. METHODS : This methodological study was conducted with 121 nurses from health care facilities in Sao Paulo's countryside, who were represented by two high-complexity and by three average-complexity health care facilities. Internal consistency was calculated using Cronbach's alpha and stability was calculated by the intraclass correlation coefficient, through test-retest. Convergent, discriminant, and known-groups construct validity techniques were conducted. RESULTS : The questionnaire was found to be reliable (Cronbach's alpha: 0.80; intraclass correlation coefficient: (0.97) In regards to the convergent and discriminant construct validity, strong correlation was found between compliance to standard precautions, the perception of a safe environment, and the smaller perception of obstacles to follow such precautions (r = 0.614 and r = 0.537, respectively). The nurses who were trained on the standard precautions and worked on the health care facilities of higher complexity were shown to comply more (p = 0.028 and p = 0.006, respectively). CONCLUSIONS : The Brazilian version of the Questionnaire for Compliance with Standard Precaution was shown to be valid and reliable. Further investigation must be conducted with nurse samples that are more representative of the Brazilian reality. The use of the questionnaire may support the creation of educational measures considering the possible gaps that can be identified, focusing on the workers' health and on the patients' safety.

Assessment of volar angulation and shortening in 5th metacarpal neck fractures: an inter- and intra-observer validity and reliability study

2012 ◽  
Vol 38 (6) ◽  
pp. 658-666 ◽  
Author(s):  
I. N. Sletten ◽  
L. Nordsletten ◽  
G. A. Hjorthaug ◽  
J. C. Hellund ◽  
I. Holme ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Test Validity ◽  
Lateral View ◽  
Medullary Canal ◽  
Validity And Reliability ◽  
Simple Method ◽  
Fracture Angle ◽  
Distal Point

Four methods for measuring volar angulation in 5th metacarpal neck fractures were tested for validity and reliability. Mid-medullary canal measurement in the lateral view (method MC-90) has previously been proven valid in a cadaveric study, hence used as a reference to test validity of the latter three. These three yielded a significant different mean fracture angle compared with MC-90, with only minor enhancement in reliability. Therefore, none of these three methods is recommended as a better standard method than the MC-90, where reliability was found to be substantial (intraclass correlation coefficient 0.53–0.81). Two methods for measuring shortening in 5th metacarpal neck fractures were compared, and stipulation of shortening by drawing a line through the most distal point of the heads of the neighbouring 3rd and 4th metacarpals (method SH-Stip) is a simple method with excellent reliability (intraclass correlation coefficient 0.81–0.96) for estimating shortening, requiring only radiological examination of the injured hand.

scholarly journals Validity and reliability of the Arabic version of the child perceptions questionnaire for 8–10-year-old children

2020 ◽  
Vol 29 (11) ◽  
pp. 3131-3141
Author(s):  
Deem Al-Blaihed ◽  
Azza A. El-Housseiny ◽  
Nada J. Farsi ◽  
Najat M. Farsi
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Arabic Version ◽  
Validity And Reliability ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha ◽  
Group I ◽  
Group Ii ◽  
Arabic Speaking

Abstract Purpose To develop an Arabic version of the CPQ8–10 and test its validity and reliability for use among Arabic-speaking children. Methods The 25-item professionally translated questionnaire included two global rating questions across four domains, which was assessed through a pilot study on 20 participants who were not included in the main study. Children (n = 175) aged 8–10 years were consecutively recruited: group I (n = 120) included pediatric dental patients, group II (n = 25) included children with orofacial clefts, and group III (n = 30) included orthodontic patients. Construct (convergent and discriminant) validity, internal consistency, and test–retest reliability were assessed using Spearman’s rank correlation coefficients, Cronbach’s alpha coefficient, and intraclass correlation coefficient, respectively. All children were clinically examined; 66 children completed the questionnaire a second time. A cross-sectional study design was employed. Results CPQ8–10 scores and global ratings were positively correlated. CPQ8–10 scores were highest in group II, followed by groups I and III, respectively. CPQ8–10 scores were significantly higher in children affected with caries or malocclusion compared to unaffected children. Cronbach’s alpha was 0.95 and the intraclass correlation coefficient was 0.97. Conclusions The Arabic CPQ8–10 was valid and reliable; therefore, it can be utilized with Arabic-speaking children in this age group.

Variability and Impact of Self-Selected Interset Rest Periods During Experienced Strength Training

2019 ◽  
Vol 126 (3) ◽  
pp. 546-558
Author(s):  
P. Ibbott ◽  
N. Ball ◽  
M. Welvaert ◽  
K. G. Thompson
Keyword(s):  
Strength Training ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Power Output ◽  
Intraclass Correlation ◽  
Rest Period ◽  
Subjective Ratings ◽  
Rest Periods ◽  
Significant Difference ◽  
Rest Time

We investigated the variability of strength trained athletes' self-selected rest periods between sets of heavy squat training. Sixteen strength-trained male athletes (Mage = 23, SD = 3 years) completed two squat training sessions 48 hours apart. Each training session consisted of five sets of 5RM squats, interspersed with self-selected interset rest periods. A Gymaware linear optical encoder collected kinetic data for each squat and temporal data for each interset rest period. The participants' subjective ratings of the experience were taken before (Readiness to Lift [RTL]) and after (Rating of Perceived Effort [RPE]) each set. Mean total rest time and mean power output differed significantly between sessions. For both sessions, interset rest period increased, and power output decreased between Sets 3, 4, and 5 (95% CI range [−101, −17]) compared with Set 1. In both sessions, RPE increased significantly in Set 3 compared with Set 1 (95% CI range = [0.68, 2.19]), while RTL decreased significantly from Set 3 (95% CI range [−2.99, −0.58]) compared to Set 1. Interset rest period and power output demonstrated fair reliability between sessions (mean intraclass correlation coefficient = 0.55), while RPE and RTL demonstrated good and excellent reliability, respectively (mean intraclass correlation coefficient = 0.63 and 0.80). In conclusion, highly trained strength athletes demonstrated a significant difference in their between session power output and total rest time when using self-selected interset rest periods, despite stability in their subjective ratings of fatigue and effort. Interset rest periods can be self-selected reliably to complete strength training in heavy squat protocol; however, power output may decline during the set.

scholarly journals Development and psychometric properties of the Thai Graves’ ophthalmopathy quality of life (GO-QOL) questionnaire

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Mingkwan Lumyongsatien ◽  
Benjama Keeratidamkerngsakul ◽  
Kanokrat Pornpanich ◽  
Sumalee Vangveeravong ◽  
Preamjit Saonanon ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Psychometric Properties ◽  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Intraclass Correlation ◽  
Clinical Activity ◽  
Life Questionnaire ◽  
Validity And Reliability ◽  
Graves Ophthalmopathy

Abstract Purpose To develop and assess the psychometric properties of the Thai version of the Graves’ Ophthalmopathy Quality of Life (GO-QOL) questionnaire. Background Graves’ ophthalmopathy (GO) is a chronic condition that causes negative self-image and impaired visual function. These conditions impact quality of life (QOL) but are rarely documented. Graves’ Ophthalmopathy Quality of Life Questionnaire (GO-QOL) has good validity, reliability and responsiveness. In this study we developed a Thai GO-QOL questionnaire by translating the questionnaire from English to the Thai language and evaluated its reliability and validity. Patients and methods Forward and backward translations were performed independently by four translators with extensive experience in both English and Thai. Seventy patients at the thyroid clinic responded to the Thai translated version upon their first visit and again 2–3 weeks afterwards. Validity was assessed by the content validity index (CVI) and correlation with relevant clinical parameters. Reliability was evaluated by Cronbach’s alpha, the intraclass correlation coefficient, and the Bland-Altman plot. Results The Thai GO-QOL version showed high CVI (0.97) and a moderate negative correlation of the functional QOL score with disease severity (r = − 0.49), the clinical activity score (r = − 0.31), and exposure parameter (r = − 0.32). It showed good reliability with a high intraclass correlation coefficient (0.92) and high Cronbach’ s coefficient (0.86). Conclusion The Thai GO-QOL has good validity and reliability. It can be used to evaluate the quality of life of Graves’ ophthalmopathy patients as a consequence of their disease in thyroid treatment programs.

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