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‘Containment’ developmental stages. (A) Dynamic input. Short temporal sequences depicting (top to bottom): ‘in-front’, ‘behind’ and ‘inside’ events. (B) Static input. Single-frame images of (top to bottom): ‘in-front’, ‘behind’ and ‘inside’ relations. (C) ‘Tight’ (top) and ‘loose’ (middle, bottom) fit. (D) High-angle view (contained object is not occluded by the container). (E) ‘Cover’ relations. (F) ‘Support’ relations.
