Hierarchic proportion

Hierarchic Proportion is a technique used in art, mostly in sculpture and painting, in which the artist uses unnatural proportion or scale to depict the relative importance of the figures in the artwork.

For example, in Egyptian times, people of higher status and/or importance would sometimes be drawn or sculpted larger than those of lower status and/or importance.

Example image: http://www.mystudios.com/art/ancient/egyptian/egypt-fowling.jpg

Sources -
ARTFORMS by Preble, Preble, Frank; Prentice Hall 2004