Answer:
De Vries find out that children form 3 to 6 years old may not differenciate identity from appereance. For a child the way someone looks defines them. If someone is wearing a mask, that person becomes the character that masks represents.
Also if a person looks different, for instance if a familiar person changes from the way women or a man look like, this interfers with the recognition of those familair people. If the appereance is different than the original representation they have, they think that person is someone else.
Step-by-step explanation:
The possibility of differenciating reality from appeareance, requires a person flexible cognitive process. When in a specific time of developing, children use concrete thinking, and they have not yet developed abstract thinking. This is why it is hard for them to separate appearence vs real things.
For example: every old man wearing a Santa outfit, may be identify as Santa.