I was told that it was 'Spiegelman' for the author and either 'Art' or 'Artie' for the character of Art. (For those of you who don't know the text, the author is a character in his own novel). However, now my teacher says to call him 'Art' instead of 'Artie', as examiners will prefer it. Does it really matter, as long as I refer to the author by last name and character as 'Art'? I've gotten so used to writing 'Art' throughout the year that I'm finding it hard to adjust to calling him Artie.
I don't want to accidently revert between the two in the exam, as this could cause confusion.
I don't really understand what you mean sorry! I studied this novel in year 10 so the context might be different, but if your teacher says to call him 'Art' and you've been writing 'Art' all year, why do you need to adjust to start calling him 'Artie'?
And no it shouldn't matter. When referring to the writer always use the surname Spiegelman, but in the text, Vladek, naturally as his father, calls him both Art and Artie, so it can be appropriate to use either. Generally I'd say use Art, unless perhaps quoting, or if the context seems okay. But for clarification, Art and Artie are the same person, and both names will refer to the character in the novel, unless I believe, if you use his full name, Art Spiegelman, this should refer to the author.