Background The psychological strategies of self-talk (S.T.) and mental imagery (MI) have an essential role in training and sports performance, but their implementation, particularly in combination, is still limited. This study aimed to examine badminton motor skills (BMS) and self-confidence (S.C.) mastery after a psychological strategy intervention of S.T. and MI, which were integrated into the BMS training process in both independent and interactive functions. The S.T. strategy consisted of instructional (I-S.T.) and motivational (M-S.T.) functions, while the MI consisted of cognitive (C-MI) and motivational (M-MI) aspects. Methods Eighty youth beginner badminton student-athletes aged 10–12 years (male = 40, female = 40) were divided through a disproportional stratified sampling into four experimental groups (EG: 2-function S.T. × 2-function MI) and one control group (CG). The intervention program lasted eight weeks (three meetings a week for a total of 24 meetings). The participants completed a fidelity check at each session. At the end of the intervention, they took a BMS test and completed a self-confidence scale. Results The S.T. and MI strategies had a significant effect on BMS and S.C. mastery (independent and interaction functions) in multivariate and univariate ways; however, independently, they had no significant effect on S.C. The effect of I-S.T. > M-S.T. and the effect of C-MI > M-MI on BMS, but there was no difference in S.C. In the I-S.T. condition, the C-MI and M-MI strategies did not have a different interaction effect on BMS mastery, but the effect of M-MI > C-MI on S.C. In the M-S.T. condition, the effect of C-MI > M-MI on the BMS and S.C. mastery. In the C-MI condition, the I-S.T. and M-S.T. strategies did not have a different interaction effect on BMS mastery, but the effect of M-S.T. > I-ST on S.C. In the M-MI condition, the effect of I-S.T. > M-S.T. on the BMS and S.C. mastery. Conclusion The results of this study contribute to the existing evidence on the effectiveness of S.T. and MI strategies in the motor skill mastery and psychological skill development of beginner student-athletes. Thus, S.T. and MI strategies can be adapted as psychological strategies that coaches and physical educators can use to improve beginner student-athlete learning, sports performance, and psychological skills.

The study was aimed at developing a performance assessment instrument model for defensive lob learning. The research method used was Research Development method for developing an assessment instrument referring to eight stages of activity, including choosing good test criteria, analyzing the sport to be tested, selecting and looking for theoretical concept literatures, selecting test items, establishing procedures, administering expert judgements, testing the instrument, and testing the estimated level of validity and reliability. The participants involved were fifth grade elementary school students aged 11-12 years. The development of instrument referred to a performance test instrument with an individual performance assessment model. The analysis consisted of the estimation of content validity (Lawshe's CVR), test-retest reliability, and inter-rater reliability (interclass coefficient correlation). The results of the analysis showed that the reliability and validity of the assessment instrument obtained a good criteria significantly (p_value 0.05). The results of reliability and validity testing conclude that the developed performance assessment instrument model can be used to measure defensive lob skills in Badminton learning for Elementary School students.

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This study aimed to examine the effect of tactical approach on students" enjoyment and skills in playing football. The study used an experimental method with a pre-test post-test control group design. A total of 40 students aged 14-15 years were involved in the study at one of junior high schools in West Bandung Regency, Indonesia. Data were collected using the Pleasure Scale and Game Performance Assessment Instruments (GPAI) which were aimed to measure the level of enjoyment and skills of the students in playing football. The measurement data were analysed using the one-way MANOVA technique. The results of the analysis showed that the F value (df = 37) was 47.57, p value = 0.00. These results indicate that the learning approaches given to students, both tactical and technical approaches, have a significant effect on the enjoyment and skills of playing football in a multivariate manner. While the analysis of the mean comparison between the two groups obtained p value = 0.00. This proves that the tactical approach has a higher and significant effect on the development of enjoyment and football playing skills. The results of the analysis also conclude that the application of tactical approach has a significant effect on the development of students' enjoyment and playing skills.

This study aims to implement the Project Based Learning model in developing students' creativity in Physical Education learning. The methodology used in this study is a quasi-experimental design with pre-test post-test only group design. The participants of this research are junior high school students in the city of Bandung. The instrument used in this research is creativity questionnaire that is developed by researchers guided by Guilford which includes aptitude traits and non-aptitude traits. All data generated in this study will be analysed using the paired sample t test analysis technique with the aim to see the effect of the Project Based Learning model in the development of student creativity seen from the comparison of pre-test and post-test scores after the intervention is given. The analysis shows that the Project Based Learning model has an influence on the development of student creativity. This is proved by obtaining the results of the analysis with a magnitude of pvalue of 0.00 (0.00 <0.05).