title: A nonarbitrary behavioral criterion for conservation of illusion-distorted length in five-year-olds.
mesh_terms: D002648:Child; D002652:Child Behavior; D002675:Child, Preschool; D005246:Feedback; D005260:Female; D005556:Form Perception; D006801:Humans; D007088:Illusions; D007600:Judgment; D008297:Male; D010469:Perceptual Distortion; D011340:Problem Solving