The purposes of this study were to examine both the validity and reliability of an eye-hand coordination (EHC) test in a dual-task paradigm in prepubertal children and the capacity of this test to discriminate between sex and age. A total of 440 children aged 6 and 11 years participated in this study. To assess EHC, a ball throwing and wall catching test was used in three different conditions (non-interference, auditory, and visual). In each condition, the duration of the test was 90 s. The numbers of successful throws and mistakes in each condition were recorded. The study demonstrated robust validation, with high interclass correlation coefficients (ICCs) indicating excellent reliability. The ICC for the number of EHC successes was.980 (95% confidence interval (CI) = [.969,.987], p <
.001), whereas the ICC for EHC mistakes was.856 (95% CI = [.782,.905], p <
.001). The standard error of measurement (SEM) was 3.17 (5.36%) for EHC successes and 1.396 (19.86%) for EHC mistakes. In addition, significant differences were observed between boys and girls (p <
.05). In conclusion, the EHC test demonstrated good reliability and validity among prepubertal children. These findings validate the tool's robustness for use in research and practice. Moreover, boys showed superior performance, which decreased in the dual-task condition regardless of age, sex, or type of interference.