scholarly journals Reliability and Factorial Validity of Non-Specific and Tennis-Specific Pre-Planned Agility Tests; Preliminary Analysis

2017 ◽  
Vol 55 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Damir Sekulic ◽  
Ognjen Uljevic ◽  
Mia Peric ◽  
Miodrag Spasic ◽  
Miran Kondric
Keyword(s):  
Factor Analysis ◽  
Preliminary Analysis ◽  
Body Height ◽  
T Test ◽  
Test Duration ◽  
Factorial Validity ◽  
Tennis Players ◽  
Important Quality ◽  
Kaiser Criterion ◽  
Latent Dimension

AbstractAgility is an important quality in tennis, yet there is an evident lack of studies focussing on the applicability of tennis-specific agility performances and comparing them to equivalent non-specific agility performances. The aim of this study was to evaluate the reliability and factorial validity of three tests of pre-planned agility, performed in specific (with a tennis racquet) and non-specific (without a tennis racquet) conditions. The sample consisted of 33 tennis players (13 males and 20 females; age: 18.3 ± 1.1 years and 18.6 ± 1.3 years; body height: 185.4 ± 51 cm and 169.3 ± 4.2 cm, 74.0 ± 4.4 kg and 61.2 ± 3.1 kg, respectively). The variables comprised three agility tests: a 20-yard test, a T-test and the Illinois test, all performed in both specific and non-specific conditions. Between-subject and within-subject reliability were found to be high (Cronbach Alpha: 0.93 to 0.98; Coefficient of Variation: 3 to 8%), with better within-subject reliability and stability of the measurement for specific tests. Pearson’s product moment correlations between the non-specific and specific agility performances were high (r ≥0.84), while factor analysis extracted only one significant latent dimension on the basis of the Guttman-Kaiser criterion. The results of the 20-yard test were better when the test was conducted in the specific conditions (t-test = 2.66; p < 0.05). For the Illinois test, superior results were recorded in the non-specific conditions (t-test = 2.96; p < 0.05), which can be explained by the test duration (about 20 s) and non-specific locomotion forms such as rotational movements. Considering the findings of the present study, when testing tennis-specific pre-planned agility, we suggest using tests of short duration (less than 10 s) and sport-specific types of locomotion.

Reliability and validity of the newly developed tests of football specific change of direction speed and reactive agility in youth players

2020 ◽  
Author(s):  
Nikola Foretic ◽  
Barbara Gilic ◽  
Damir Sekulic
Keyword(s):  
Factor Analysis ◽  
Body Height ◽  
Reliability And Validity ◽  
Football Players ◽  
Systematic Bias ◽  
Factorial Validity ◽  
Specific Change ◽  
Change Of Direction ◽  
Youth Football ◽  
Reactive Agility

Purpose: Agility is an important determinant of success in football (soccer), but there is a lack of reliable and valid tests applicable in the evaluation of different agility components in youth football players. In this study we evaluated the reliability and factorial validity of the two newly developed tests of agility in male youth football players. Methods: The sample comprised 44 youth football players (all males, 14–15 years of age) who were tested on anthropometrics (body height and mass), newly developed tests of foot-ball specific reactive agility (FS-RAG) and change of direction speed (FS-CODS), one stand-ard test of CODS (20-yards), and sprinting over 20-m distance (S20M). The relative reliability is evaluated by calculation of Intra-Class-Correlation coeficients (ICC), while the absolute reliability was evaluated by calculation of the coeficient of variation (CV). Further, systematic bias was checked by analysis of variance for repeated measurements (ANOVA). The asso-ciations between studied variables were evidenced by Pearson’s correlation. Finally, factor analysis was calculated to define the factorial validity of agility tests (FS-RAG, FS-CODS, 20-yards). Results: The newly developed football-specific tests were found to be reliable, with better re-liability of FS-CODS (ICC: 0.81, CV: 6%), than of FS-RAG (ICC: 0.76, CV: 9%). The ANOVA evidenced significant (p < 0.05) learning effects for FS-RAG, but post-hoc analysis indicated stabilization of the results until the third testing trial. Factor analysis extracted one significant factor under the Guttmann-Kaiser criterion (Explained Variance: 1.67), showing the appro-priate factorial validity of newly developed tests in comparison to standard agility indicator 20-yards. Meanwhile, the significant correlations between all agility performances with S20M (Pearson’s R: 0.52–0.63; all p < 0.01) revealed that sprinting capacity significantly influence agility performances and that conditioning capacities of youth football players are not yet discriminated. Conclusion: Results showed appropriate reliability and validity of the newly developed tests of football specific change of direction speed and reactive agility. Therefore, here proposed FS-CODS and FS-RAG can be used as reliable and valid measures of agility components in youth football players. Further studies should evaluate the discriminative validity of the here proposed tests (i.e. identification of position-specific or performance-related differences), as well as reliability in younger players than those studied herein.

Confirmatory Factor Analysis of the Long and Short Forms of the Worry Domains Questionnaire

2009 ◽  
Vol 25 (4) ◽  
pp. 239-243
Author(s):  
Roberto Nuevo ◽  
Andrés Losada ◽  
María Márquez-González ◽  
Cecilia Peñacoba
Keyword(s):  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Factor Structure ◽  
Goodness Of Fit ◽  
Factorial Validity ◽  
Fit Indices ◽  
Short Forms ◽  
Confirmatory Factor ◽  
Positive Correlations ◽  
Future Work

The Worry Domains Questionnaire was proposed as a measure of both pathological and nonpathological worry, and assesses the frequency of worrying about five different domains: relationships, lack of confidence, aimless future, work, and financial. The present study analyzed the factor structure of the long and short forms of the WDQ (WDQ and WDQ-SF, respectively) through confirmatory factor analysis in a sample of 262 students (M age = 21.8; SD = 2.6; 86.3% females). While the goodness-of-fit indices did not provide support for the WDQ, good fit indices were found for the WDQ-SF. Furthermore, no source of misspecification was identified, thus, supporting the factorial validity of the WDQ-SF scale. Significant positive correlations between the WDQ-SF and its subscales with worry (PSWQ), anxiety (STAI-T), and depression (BDI) were found. The internal consistency was good for the total scale and for the subscales. This work provides support for the use of the WDQ-SF, and potential uses for research and clinical purposes are discussed.

Psychometric characteristics of the Personality Belief Questionnaire – Short Form

2013 ◽  
Vol 14 (3) ◽  
Author(s):  
Donizete Tadeu Leite ◽  
Ederaldo José Lopes ◽  
Renata Ferrarez Fernandes Lopes
Keyword(s):  
College Students ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Personality Disorders ◽  
Short Form ◽  
Factorial Validity ◽  
Dysfunctional Beliefs ◽  
Psychometric Characteristics ◽  
Brazilian Version ◽  
Practical Tool

This study evaluated the psychometric properties of the Brazilian version of the Personality Belief Questionnaire – Short Form (PBQ-SF). A sample of 700 college students answered to the Brazilian version of the PBQ-SF. The results showed good estimates of reliability (Cronbach’s alpha) of the PBQ-SF scales, indicating a significant association between the beliefs of each of the scales. The results of factor analysis of the PBQ-SF were similar to its original version. Overall, the findings provide support for the existence of factorial validity for the Brazilian version of the PBQ-SF, suggesting that it is a practical tool for the measurement of dysfunctional beliefs related to personality disorders

Gratifications for using social media

2016 ◽  
Vol 34 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Chunmei Gan
Keyword(s):  
Social Media ◽  
Factor Analysis ◽  
Data Analysis ◽  
University Students ◽  
Factor Structure ◽  
T Test ◽  
Sina Weibo ◽  
Chinese University ◽  
Valid Data ◽  
Paired T Test

The purpose of this paper is to examine the general and specific gratifications that drive users’ choice of different social media. Sina Weibo and WeChat in China were selected for the current study. Two separate empirical surveys were conducted and 368 valid data were collected from Chinese university students experienced in using Sina Weibo or WeChat. Exploratory factor analysis, paired t test and independent-samples t test were employed for data analysis. The results identify four general gratifications for using different social media: hedonic gratification, affection gratification, information gratification and social gratification. In addition, factor structure of information gratification is different for different social media. Furthermore, the strength of each gratification differs to varying degrees across the use of different social media. Information gratification plays the most salient role in using Sina Weibo, whereas affection gratification is the most important motive for the use of WeChat. Also, the use of Sina Weibo can better fulfill individuals’ information and hedonic gratifications, while individuals prefer to use WeChat for achieving gratifications of social and affection.

scholarly journals Transcultural Adaptation and Theoretical Models of Validation of the Spanish Version of the Self-Care of Heart Failure Index Version 6.2 (SCHFI v.6.2)

2021 ◽  
Vol 18 (2) ◽  
pp. 569
Author(s):  
Raúl Juárez-Vela ◽  
Angela Durante ◽  
Rosa Antonio-Oriola ◽  
Vicente Gea-Caballero ◽  
Michał Czapla ◽  
...  
Keyword(s):  
Heart Failure ◽  
Factor Analysis ◽  
Psychometric Properties ◽  
Exploratory Factor Analysis ◽  
Self Care ◽  
Public Health Problem ◽  
The Self ◽  
Spanish Version ◽  
Factorial Validity ◽  
Failure Index

Background: Heart failure (HF) is a major and growing public health problem worldwide. Across the world, heart failure is associated with high mortality, high hospitalization rates, and poor quality of life. Self-care is defined as a naturalistic decision-making process involving the choice of behaviors that maintain physiologic stability, the response to symptoms when they occur, and the ability to follow the treatment regimen and control symptoms. One instrument used to measure self-care is the Self Care of Heart Failure Index. Aim: The purpose of this study was to test the psychometric properties of the Spanish version of the Self Care of Heart Failure Index v.6.2 (SCHFI v.6.2). Methodology: Before testing its psychometric properties, the SCHFI v.6.2 was translated and adapted from its original English version into Spanish. Subsequently, we tested the instrument’s psychometric properties on a sample of 203 participants with HF. Descriptive statistics were used to analyze the sociodemographic and clinical variables, and to describe item responses. We tested the factorial validity of the SCHFI v.6.2 using confirmatory and exploratory factor analysis. Results: Confirmatory factor analysis (CFA) was performed using the our pre-existing models which resulted with poor fit indices. Thus, we performed exploratory factor analysis (EFA) on each of the SCHFI v.6.2 scales. Conclusion: The Spanish version of the SCHFI v.6.2. has good characteristics of factorial validity and can be used in clinical practice and research to measure self-care in patients with HF.

scholarly journals Các nhân tố tác động đến định hướng khách hàng của nhân viên phục vụ khách sạn TPHCM

2020 ◽  
Author(s):  
Ha Nam Khanh Giao ◽  
Dang Thu Huong
Keyword(s):  
Factor Analysis ◽  
Exploratory Factor Analysis ◽  
T Test ◽  
Cronbach’S Alpha ◽  
Cronbach's Alpha

Hiện nay, các khách sạn nhà hàng đều đưa chương trình “Định hướng khách hàng” vào trong quá trình hội nhập của doanh nghiệp cho những nhân viên mới và nhân cũ tái hội nhập. Đề tài được thực hiện nhằm tìm hiểu những nhân tố đánh giá định hướng khách hàng của nhân viên tiếp xúc trực tiếp khách hàng thuộc bộ phận thực phẩm (Food &amp; Beverages- F&amp;B) và bộ phận buồng (Housekeeping) tại các khách sạn 3-5 sao tại thành phố Hồ Chí Minh, và đo lường thang đo các nhân tố ảnh hưởng đến kỹ năng bán hàng hướng tới người mua.Phương pháp nghiên cứu bao gồm nghiên cứu định tính nhằm khám phá vấn đề và thiết kế bản câu hỏi, nghiên cứu định lượng: thống kê mô tả, thiết lập và kiểm định mô hình, phân tích nhân tố khám phá (Exploratory factor analysis- EFA), kiểm định thang đo (Cronbach’s Alpha), t-test, ANOVA với phần mềm SPSS for Windows 15.0. Kết quả ủng hộ 4 nhân tố xác định “định hướng khách hàng”: Khả năng làm việc nhóm, Môi trường doanh nghiệp, Khả năng phát triển nghề nghiệp, Kinh nghiệm làm việc.

scholarly journals EVALUASI PERFORMA BOBOT BADAN DAN STATISTIK VITAL SAPI MADURA BERDASARKAN TAHUN KELAHIRAN

2017 ◽  
Vol 5 (2) ◽  
pp. 40
Author(s):  
Sulistyoningtyas I. ◽  
V.M. Ani Nurgiartiningsih ◽  
Gatot Ciptadi
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Animal Health ◽  
Body Height ◽  
Animal Breeding ◽  
T Test ◽  
Female Cattle ◽  
Test Result

This research was done to compare performance of Madura cattle born in 2015 and 2016 at Unit of Technical for Animal Breeding and Animal Health Madura. Two hundred tails of Madura cattle that were one day old, 205 days old, and 365 days old were used in this research. They were offsprings of 12 tails of male cattle and 200 tails of female cattle. Variables observed were body weight, body height, body length, and heart girth. Data collected were analyzed by t test. Result of this research indicated that performance of Madura cattle that was one day old and 205 days old born in 2015 and in 2016 were not different (P>0.05). Performance of Madura cattle that was 365 days old born in 2015 and in 2016 were different (P<0.05). The performance of cattle born in 2015 versus in 2016 were 113.00±12.19 kg vs 120.00±10.86 kg for body weight (yearling weight),  110.00±6.81 cm vs 114.00±2.46 cm for body height, 103.00±6.70 cm vs 106.00±4.71 cm for body length, and 118.00±8.05 cm vs 120.00±5.91 cm for heart girth. It could be concluded that performance of Madura cattle that was 365 days old born in 2016 were higher than that was in 2015. Keywords: Madura cattle, Body weight, Bidy height, Body length, Heart girth

Perceptions of the UAE's Government Communicators Regarding Social Media Roles

2020 ◽  
Vol 11 (4) ◽  
pp. 20-35
Author(s):  
Elsayed Darwish
Keyword(s):  
Social Media ◽  
Factor Analysis ◽  
Statistical Methods ◽  
Influencing Factors ◽  
Online Community ◽  
Strategic Communication ◽  
T Test ◽  
Descriptive Statistics ◽  
Government Communication ◽  
The Social

Governmental and nonprofit agencies have been increasingly reconsidering the roles of social media communicators for strategic communication to ensure they accurately perceive their roles. A questionnaire and interviews were conducted with various social media communicators in the UAE to identify the practitioners' perceptions of using social media in government communication and the influencing factors on their roles. A set of roles was created based on the literature and theory to explore the social media communicators' roles. The statistical methods include descriptive statistics, factor analysis, correlations, and T-test. This study demonstrates that four factors describe the various roles of SMCs in the UAE as follows: (1) government advocates, (2) information and image disseminators, (3) research and services providers, and (4) online community builders. To some extent, these roles overlap with previous roles identified.

Internet Lifestyle of Iranian Users

2015 ◽  
Vol 6 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Amir Abedini Koshksaray ◽  
Tayebeh Farahani
Keyword(s):  
Factor Analysis ◽  
Confirmatory Factor Analysis ◽  
Construct Validity ◽  
T Test ◽  
The Internet ◽  
High Effectiveness ◽  
Internet Users ◽  
Confirmatory Factor ◽  
Perceived Importance ◽  
The Mean

One distinguishing factor of individuals is their lifestyles. In the internet, every individual shows a different behavior while some groups have rather similar behaviors. By identifying these groups and their interests and preferences, it becomes possible to offer a product or advertising which is compatible with their wants. This leads to conveying the value presented by the producer to the consumer with high effectiveness. One source of identifying target customers or internet users is their lifestyle in internet space. The present study aims at describing and explaining internet lifestyle (e-lifestyle) of Iranian users. In particular, this study tries to find out the most common e-lifestyle of Iranian users. To this aim, 412 students involved with internet were surveyed. After estimating the construct validity of the study through confirmatory factor analysis, the mean scores of each e-lifestyle were compared by student t-test. The results revealed that Iranian users have mostly entertainment-driven e-lifestyles. The perceived importance-driven, sociability-driven, interest-driven, novelty-driven, need-driven, and uninterested or concern-driven e-lifestyles were respectively identified after that. This is the first study investigating the most common e-lifestyle among Internet users.

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