The purpose of this study was to determine the age level standards of the Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) battery. The LOTCA evaluates four major areas: orientation, visual and spatial perception, visuomotor organization and thinking operations. Initial reliability and validity have been determined by Katz, Itzkovich, Averbuch & Elazar (1989). Subjects were 240 normal primary school children, 40 in each year's age group between six and twelve. Results show overall significant statistical differences between the six groups. The groups that are the most different are the six and seven years old compared to the eleven to twelve years old. Level of performance across almost all the LOTCA subtests increased steadily with age, and the length of time required to perform the visuomotor tasks decreased congruently with the increase in performance. These findings provide data for the hierarchical order and support the underlying assumption of the developmental progression of the LOTCA subtests. Findings regarding the speed of performance indicate the importance of measuring time and considereing this variable together with the level of performance. Finally, it is essential to continue and study questions related to the performance on the LOTCA and to the conclusions from this study.