Comparison of the Evaluation of Performance Preconditions in Tennis with the Use of Equal and Expertly Judged Criteria Weights

Tennis performance is influenced by various factors, among which physical performance factors play an important role. The aim of the study was an analysis of possibilities of the use of Saaty’s method for assessing the level of performance prerequisites and comparing the results obtained using equal weights and various weights. The research on Czech female players (U12; n = 211) was based on the results of the TENDIAG1 test battery (9 items) and the results were processed by FuzzME software and relevant statistical methods (correlation coefficient r, Student´s t-test, effect size index d). The results of Saaty’s method show that the most important athletic performance criteria for tennis coaches are the leg reaction time and the running speed, while the least important are endurance and strength. The evaluation using various criteria weights offers a finer scale for assessing athletes’ performance prerequisites despite the proven high degree of association between the results obtained with equal and various weights and the insignificant difference of mean values. The results have shown possibilities for the use of a fuzzy approach in sports practice and motivate further research towards broadening the structure or the number of evaluation criteria.

INFLUENCE OF THE INSANITY WORKOUT ON THE EXERCISE CAPACITY OF MILITARY STUDENTS

The research purpose is to improve the exercise capacity of military students (VAM, VO2 max and average heart rate) by applying the Insanity Workout in the physical education lesson. The following scientific methods were used: documentation, observation, statistical processing and graphical representation of the results. Subject assessment was based on the Yo-Yo Intermittent Recovery Test Level 1 (YYIR1), and Polar H10 Heart Rate Sensor was used. The research included the following stages: stage 1 - conducting an initial assessment; stage 2 - applying the Insanity Workout; stage 3 - performing a final assessment of the studied subjects to assess their response (evolution/involution/stagnation); stage 4 - interpretation of results and conclusion. Based on the paired t-test, the following results are obtained: the increase of the average maximum aerobic speed achieved at the end of the training period is statistically significant, p = 0.005 < 0.05 for t = 3.003 and df = 29. The effect size index indicates a medium-to-high difference between the two means; the increase of the average maximum aerobic capacity achieved at the end of the training period is statistically significant, p < 0.001 < 0.05 for t = 6.536 and df = 29. The effect size index indicates a significant difference between the two means; the decrease of the average heart rate at the end of the training period is statistically significant, p < 0.001 < 0.05 for t = 5.012 and df = 29. The effect size index indicates a high difference between the two means.

A meta-analysis of the effects of problem-based learning on students' creative thinking in mathematics

[English]: This study examined the effect of Problem-based Learning (PBL) on students' creative mathematical thinking in Indonesia during the last eight years using meta-analysis. Data were obtained from primary studies published in national journals, conference proceedings, and master thesis from 2012 to 2020. This study analyzed 19 effect sizes from 19 primary studies that fulfill the inclusion criteria. The effect size index used the Hedges' g equation and statistical analysis was assisted by comprehensive meta-analysis (CMA) software. The effect size variation test was conducted by analyzing the study's five characteristics, namely the year of study, level of education, sample size, length of treatment, and publication sources. Based on the analysis results, the overall effect size was 0.821, with a standard error of 0.130 at the 95% confidence interval (CI) referring to the random-effects model. The effect size is classified as moderate, meaning that PBL has a moderately positive effect on students' creative mathematical thinking. The results of the analysis of the characteristics of the study show that the application of PBL to improve students' mathematical creative thinking relates to the research year (Q = 55.683; p <0.05), the treatment duration (Q = 5.644; p <0.05), and publication sources (Q = 13.812; p <0.05). It was found that the PBL was more effective in conditions of treatment duration of fewer than four meetings. There is a tendency that PBL has a significant impact when it is first implemented. The findings' implications are discussed to provide important information as a basic idea for further PBL research and implementation. Keywords: Problem-based learning, Creative thinking, Meta-analysis [Bahasa]: Penelitian ini menguji pengaruh problem-based learning (PBL) terhadap berpikir kreatif matematis siswa di Indonesia selama delapan tahun terakhir melalui meta-analisis. Data diperoleh dari studi primer yang telah dipublikasikan di jurnal nasional, prosiding konferensi, dan tesis master tahun 2012-2020. Penelitian ini menganalisis 19 ukuran efek dari 19 studi primer yang memenuhi kriteria penyertaan. Indeks ukuran efek menggunakan persamaan Hedges' g dan analisis statistik dibantu oleh perangkat lunak comprehensive meta-analysis (CMA). Pengujian variasi ukuran efek dilakukan dengan menganalisis lima karakteristik penelitian yaitu tahun studi, tingkat pendidikan, ukuran sampel, lama perawatan, dan sumber publikasi. Berdasarkan hasil analisis, ukuran efek keseluruhan adalah 0,821, dengan kesalahan standar 0,130 pada interval kepercayaan 95% (CI) menurut model efek acak. Ukuran efek tergolong sedang, artinya penggunaan PBL berpengaruh positif sedang terhadap berpikir kreatif matematis siswa. Hasil analisis karakteristik penelitian menunjukkan bahwa penerapan PBL untuk meningkatkan berpikir kreatif matematis siswa berkaitan dengan tahun penelitian (Q = 55,683; p <0,05), durasi perlakuan (Q = 5,644; p <0,05) , dan sumber publikasi (Q = 13.812; p <0.05). Ditemukan bahwa PBL lebih efektif pada kondisi durasi perlakuan kurang dari 4 pertemuan. Terdapat kecenderungan bahwa PBL berdampak besar saat pertama kali diterapkan. Implikasi hasil penelitian dibahas untuk memberikan informasi penting sebagai ide dasar untuk penelitian dan implementasi PBL selanjutnya. Kata kunci: Problem-based learning, Berpikir kreatif, Meta-analysis

A Robust Effect Size Index

Effect size indices are useful tools in study design and reporting because they are unitless measures of association strength that do not depend on sample size. Existing effect size indices are developed for particular parametric models or population parameters. Here, we propose a robust effect size index based on M-estimators. This approach yields an index that is very generalizable because it is unitless across a wide range of models. We demonstrate that the new index is a function of Cohen’s d, $$R^2$$ R 2 , and standardized log odds ratio when each of the parametric models is correctly specified. We show that existing effect size estimators are biased when the parametric models are incorrect (e.g., under unknown heteroskedasticity). We provide simple formulas to compute power and sample size and use simulations to assess the bias and standard error of the effect size estimator in finite samples. Because the new index is invariant across models, it has the potential to make communication and comprehension of effect size uniform across the behavioral sciences.

The impact of personality in recognizing disinformation

Purpose The purpose of this paper is to investigate and quantify the effects of personality traits, as defined by the five-factor model (FFM) on an individual’s ability to detect fake news. The findings of this study are increasingly important because of the proliferation of social media news stories and the exposure of organizational stakeholders and business decision makers to a tremendous amount of information, including information that is not correct (a.k.a. disinformation). Design/methodology/approach The data were collected utilizing the snowball sampling methodology. Students in an Management Information Systems course completed the survey. Since a diverse sample was sought, survey participants were instructed to recruit another individual from a different generation. The survey questions of the FFM identify particular personality traits in respondents. Survey respondents were given a collection of nine news stories, five of which were false and four that were true. The number of correctly identified stories was recorded, and the effect of personality traits on the ability of survey respondents to identify fake news was calculated using eta-squared and the effect size index. Findings Each of the five factors in the FFM demonstrated an effect on an individual’s ability to detect disinformation. In fact, every single variable studied had at least a small effect size index, with one exception: gender, which had basically no effect. Therefore, each variable studied (with the exception of gender) explained a portion of the variability in the number of correctly identified false news stories. Specifically, this quantitative research demonstrates that individuals with the following personality traits are better able to identify disinformation: closed to experience or cautious, introverted, disagreeable or unsympathetic, unconscientious or undirected and emotionally stable. Originality/value There is scant research on an individual’s ability to detect false news stories, although some research has been conducted on the ability to detect phishing (a type of social engineering attack to obtain funds or personal information from the person being deceived). The results of this study enable corporations to determine which of their customers, investors and other stakeholders are most likely to be deceived by disinformation. With this information, they can better prepare for and combat the impacts of misinformation on their organization, and thereby avoid the negative financial impacts that result.

Effect size and meta-analysis in Spanish professional psychologists

The Evidence-Based Practice approach is based on the use of scientific research in decision-making in an effort to produce the best possible services in clinical practice. The knowledge level about effect size statistics and meta-analysis studies may affect the decision soft professionals and jeopardize the quality of psychological interventions. This paper presents the result so fan on-line survey on the degree of knowledge of these topics among Spanish practitioner psychologists. The sample consisted of 77 participants (68.8% women and 31.2% men), with a mean age of 41.44 years (SD=9.42), with age range of 25-64 years. The results suggest that most of the psychologists survey eddid not have adequate knowledge about effect size index, meta-analysis studies, or methodological quality checklists. It is therefore necessary to improve the statistical education of practitioner psychologists, which might also contribute to their provement of professional practice.

Effect size and meta-analysis in Spanish professional psychologists

The Evidence-Based Practice approach is based on the use of scientific research in decision-making in an effort to produce the best possible services in clinical practice. The knowledge level about effect size statistics and meta-analysis studies may affect the decision soft professionals and jeopardize the quality of psychological interventions. This paper presents the result so fan on-line survey on the degree of knowledge of these topics among Spanish practitioner psychologists. The sample consisted of 77 participants (68.8% women and 31.2% men), with a mean age of 41.44 years (SD=9.42), with age range of 25-64 years. The results suggest that most of the psychologists survey eddid not have adequate knowledge about effect size index, meta-analysis studies, or methodological quality checklists. It is therefore necessary to improve the statistical education of practitioner psychologists, which might also contribute to their provement of professional practice.

Gauging the impact of behavior change interventions: A tutorial on the Numbers Needed to Treat

Effect size indices are valuable to research in applied psychology, but traditional measures (e.g. Cohen’s d or Pearson’s r) are limited by their ability to convey practical information about intervention effectiveness. Researchers rely on concepts such as ‘standardized mean difference’ or ‘explained variance’ to express effectiveness. Practitioners, policymakers, and lay-people prefer concepts such as frequencies. Partial solutions have been offered by rules-of-thumb (e.g. Cohen’s categories of ‘small’, ‘moderate’ and ‘large’), but such pigeon-holing is somewhat arbitrary and of little nuance. We review, and provide a tutorial on, the Numbers Needed for Treat (NNT) statistic—an effect size index that originated in the medical literature. NNT fills the communicative gap between research and practice, and is particularly suited to gauge the impact of a behavior change intervention on a population level. NNT is defined as the number of people who need to be exposed to an intervention to achieve the desired change in one more individual, relative to a control condition. NNT has informational advantages: 1) it communicates effect magnitude in a frequency-format (number of people) making the impact of an intervention on a population transparent, and 2) it considers the population behavior base-rate to estimate this number. We adapt and extend the NNT index to suit applied psychology endeavors, and argue that the measure can strengthen the translation of intervention research to practice. The statistical procedure to estimate the NNT is explained, illustrated with concrete examples, and supplemented by script and functions to calculate the index in the R - environment.

Effect Size Model Pembelajaran Kooperatif Tipe Numbered Heads Together (Nht) Terhadap Kemampuan Berpikir Kritis Siswa pada Pembelajaran Fisika

The purpose of this research is to know the effect size of cooperatif learning model to critical thinking skills students at physics learning Class 8th grade Junior High School 24 Bandar Lampung. The type of this research was a quasi experimental with pretest - posttest control group design. The research involved two groups of students who accounted for 34 students for experiment class and 36 students for control class. The collection of data obtained using a test instrument shaped essay at critical thinking skills level. The results show that cooperative learning model type NHT have effect to critical thinking skills on effect size index 0,7. The effect size index 0,7 show that NHT to outcome critical thinking skills of students i.e 62 % better than control class. Experiment class is better than control class at random sampling are 0,58 it means each one of 100 random sampling give effect for 58 sampling to improve critical thinking skills of students at learning physics.Penelitian ini bertujuan untuk mengetahui effect size dari model pembelajaran kooperatif tipe numbered heads together (NHT) terhadap kemampuan berpikir kritis siswa pada pembelajaran fisika kelas VIII SMP Negeri 24 Bandar Lampung. Jenis penelitian ini adalah quasi eksperimen dengan pretest - posttest control group design. Penelitian ini melibatkan 2 kelompok belajar siswa yang berjumlah 34 siswa untuk kelas Eksperimen dan 36 siswa untuk kelas kontrol. Pengumpulan data diperoleh dengan menggunakan instrumen tes berbentuk essay pada level kognitif kemampuan berpikir kritis. Diperoleh hasil penelitian bahwa model pembelajaran kooperatif tipe NHT mempunyai pengaruh terhadap kemampuan berpikir kritis pada pembelajaran fisika dengan indeks effect size sebesar 0,3. Effect size 0,3 ini menunjukkan bahwa NHT dapat menghasilkan outcome kemampuan berpikir kritis siswa sebesar 58 % lebih baik dari kelas kontrol. Kelebihan kelas eksperimen dari kelas kontrol dalam pengambilan sampel acak sebanyak 0,58 artinya pada setiap 100 sampel acak NHT dapat mempengaruhi 69 sampel untuk meningkatkan kemampuan berpikir kritis siswa pada pembelajaran fisika.