Several investigators find that infants fail to use property information to individuate objects until 12 months of age (e.g., Xu & Carey, 1996), while others find that infants successfully employ property information in the service of object individuation at 9.5 months (e.g., Wilcox & Baillargeon, 1998a). This study investigated methodological differences between 2 sets of studies that may help to resolve this apparent conflict. It was hypothesized that infants younger than 12 months rely heavily on spatiotemporal information and it overrides any conflicting property information. In 2 experiments, we used a simplified manual search procedure much like Wilcox and Baillargeon's (1998a) simplified looking time procedure by reducing the number of alternations of the objects. Results suggest that when the spatiotemporal evidence specifying a single object that changes properties is weaker, 10-month-old infants succeed in using property information for object individuation. (Contains 2 figures and 2 footnotes.)