In "mother tongue," author amy tan describes a situation in which her mother, a non-english speaker, faces rude treatment from a doctor. this doctor is then polite to tan, who speaks english without an accent. what phenomenon does the doctor demonstrate?

Peter van daan arrived at nine-thirty in the morning (while we were still at breakfast). peter's going on sixteen, a shy, awkward boy whose company won't amount to much. mr. and mrs. van daan came half an hour later. in both the diary and the play the diary of anne frank, how is peter portrayed when he first comes to the annex?