Perceptual constancy: The perceptual system can maintain a stable understanding of objective things within a certain range, and does not change with changes in perceptual conditions or sensory image patterns. Is the following perceptual constancy? ['The 5-year-old obviously took the plane for the first time, and the people who saw the ground in the air were as small as ants, which was strange. "How did people become so small?".', 'The same water, poured from the big cup into the small cup, obviously feels that the water has become more.', 'I was confused when I saw the trees running on both sides of the road.', 'Mom changed her clothes today and her hair was dyed, but she still recognized her at a glance.']