"The purpose of this study was to develop a computerized Immediate Feedback Assessment Technique to develop a computerized measurement spatial ability testing tool. The subjects of this study were 258, 5-7 years old, children in Taiwan. By using this computerized measurement testing tool to examine the influence of children play experience and parents' socioeconomic status on the differences of spatial ability performance of children aged 5 to 7 of different gender. The main research findings are as followings: first, the computerized IFAT spatial ability test had good reliability and validity. The computerized IFAT polychromous scoring method had better discrimination than computerized dichotomous scoring method; second, play experience played an interactive role in the spatial ability of children of different genders. The spatial ability performance of boys is statistically significantly better than girls. The play experience was the moderator variable that affects the spatial ability performance of children of different gender and the play experience was the mediator variable between the spatial ability performance and their parent's socioeconomic status."