Current published data on sex differences in spatial perception is inconclusive. In particular, there are no convincing data on the spatial visualization skills of young children; consequently, it is thought that such differences may be absent. This study was conducted to investigate
sex differences in spatial visualization in a sample of Kuwaiti school children. Two hundred and thirty-five pupils (109 boys and 126 girls) aged from 5 to 9 years participated in the study. Experimental stimuli were used as a spatial visualization test. The data clearly showed that boys performed
better than girls on the spatial visualization test. Their superiority resulted from a greater facility to encode shapes in general, rather than from a greater facility to specifically encode shapes in the orientations in which they were presented.