This study aimed to analyze the effect of modified basketball games on the social skills of male and female students in Physical Education, Sports, and Health (PJOK) learning and to examine differences in social skills improvement by gender. This study employed a quantitative approach using a quasi-experimental method with a pretest–posttest control group design. The sample consisted of 72 twelfth-grade students from SMAN 7 Bandung, comprising 36 students in the experimental group and 36 students in the control group, selected through purposive sampling. Data were collected using a social skills questionnaire and analyzed using t-tests, Welch’s test, effect size analysis, and analysis of covariance (ANCOVA). The results showed that modified basketball games significantly improved social skills among female students (N-Gain = 0.814; p < 0.001) and male students (N-Gain = 0.760; p < 0.001). However, the difference in social skills improvement between male and female students was not statistically significant (p = 0.257). The experimental group achieved a higher N-Gain score (0.782) than the control group (0.349; p < 0.001), and the difference between groups remained significant after controlling for pretest scores using ANCOVA. Therefore, modified basketball games can serve as an alternative PJOK learning strategy to improve students’ social skills, with no statistically significant difference in improvement based on gender. Keywords: Gender,Modified Basketball Games, Physical Education, Quasi-Experiment, Social Skills.
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