title: Three experiences affecting spatial discrimination learning by ambulatory children.
mesh_terms: D002657:Child Development; D002675:Child, Preschool; D002755:Choice Behavior; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D007223:Infant; D008124:Locomotion; D008297:Male; D009949:Orientation; D013028:Space Perception