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Spatial ability is known to have an important role in learning different skills in childhood and achieving success in specific professions. A vast majority of the studies on this topic have focused on adults, and few on in children. In this study, eight tasks were selected to assess eight factors of spatial ability and were modified to be suitable for children. Computerized versions of the tasks were designed and their reliability was measured. One-hundred and ten Iranian children aged 9 to 12 years old participated in the study. In order to assess the test-retest reliability, half of the participants were tested twice. Internal consistency reliability was calculated for some of the tasks. Intraclass correlation coefficients were obtained by test-retest reliability analysis for all tasks ranging from 0.689 to 0.997. The range of Cronbach's a coefficient was found to be between 0.335 and 0.784. The range of the ω coefficient was from 0.428 to 0.798. Each modified task had adequate reliability for assessing the respective spatial ability factors. This battery can help to identify the level of spatial performance in children. [ABSTRACT FROM AUTHOR]