## 3 Results  
Table 3 presents the test results of the participants and their intergroup variability (groups: EXP vs. CON). Regarding the baseline assessment (I measurement--pre-test), more favorable test results were observed for reaction time, visual-motor coordination, spatial orientation, divided attention, and perception orientation in the CON group, although the differences were not statistically significant (\(p>0.05\)). Conversely, an opposite trend was noted only for complex reaction time, favoring the EXP group, with the differences also being non-significant (\(p>0.05\)). After 13 weeks of applying the experimental stimulus and standard training (II measurement--post-test 1), the CON group showed better results in divided attention and perception orientation. In contrast, the EXP group outperformed in tests of simple and complex reaction time, as well as spatial orientation. For visual-motor coordination, both groups exhibited the same average score. No significant differences between variables in the tested groups were found for this measurement (\(p>0.05\)). After 32 weeks of the training period (experimental vs. standard training), the final measurement (III measurement--post-test 2) revealed significant differences in the perception orientation test (\(p<0.05\)), with better results in the CON group. This group also showed more favorable outcomes for simple and complex reaction time and divided attention. However, these differences did not reach statistical significance (\(p>0.05\)). The EXP group achieved better results in visual-motor coordination and spatial orientation, without significant differences (\(p>0.05\)). The coefficients of variation indicate that the internal variability of the test variables was very low in both groups (EXP vs. CON) (V = 5-23%). For the trials of divided attention (II measurement) in the EXP group (V = 27%) and complex reaction time (II measurement) in the CON group (V = 28%), moderate internal variability was observed. Table 4 presents the range of progression in psychomotor skill components and the degree of intra-group variability in the studied handball players (EXP vs. CON). In the EXP group, after a 32-week period of experimental training (first measurement period--pre-test vs. third measurement period--post-test 2), there was a statistically significant improvement in test effectiveness for the following: simple reaction time (\(p<0.05\)), visual-motor coordination (\(p<0.001\)), spatial orientation (\(p<0.05\)), divided attention (\(p<0.05\)), and perception orientation (\(p<0.05\)). Additionally, significant progress in visual-motor coordination and perception orientation was observed after 13 weeks of intervention (first measurement period vs. second measurement period). Continued improvements in visual-motor coordination and perception orientation were detected during the second half of the experiment (second measurement period vs. third measurement period), with statistical significance (\(p<0.05\)). In the CON group, after 13 weeks of standard training, a trend of significant improvement was noted for visual-motor coordination, spatial orientation, divided attention, and perception orientation (\(p<0.05\)). Furthermore, significant increases were observed for complex reaction time during the second 19 weeks of training (second measurement period vs. third measurement period) and visual-motor coordination during the first 13 weeks of training (first measurement period vs. second measurement period).