The purpose of this study was to analyze the DiViSA�s predictive validity in school-age children. To do so, two groups of school-age children were compared: one with low school achievement (N = 1,174), and one with typical development (N = 1,426). The obtained results show that: (1) in all grades, children with poor school performance exhibited lower levels of attention and task organization, greater hastiness, and made more commission errors; (2) the combination of variables that best differentiated between groups was not the same in all grades; (3) level of organization improved with age in the low-school-achievement group, and did not in the typical-development group; (4) the data regarding sensitivity (81% to 93%) and specificity (79% to 90%), for the first time computed for each grade separately, support the test�s predictive validity in the grades we evaluated. The discussion focuses on the DiViSA test�s usefulness in diagnosing attention problems. It is the first computerized test to include separate scores for: (a) how children complete the task (organization) and (2) the source of their errors (distraction or hastiness).