Categorization of two-dimensional and three-dimensional stimuli by 18-month-old infants.

Highlights: [•] Explored 18-month-old infants’ flexibility in categorization across different object representations. [•] Infants completed superordinate and basic-level categorization tasks with 3D replicas, 2D cut out photographs, or 2D images on photo cubes. [•] Categorization processes differ for 3D and 2D stimuli. [•] Discovery of object properties over time while manipulating objects may facilitate categorization at some levels. [•] The findings are discussed in the context of infants’ representation abilities and the integration of perception and action. [Copyright &y& Elsevier]