Mr Bednorz Was Told by His Principal That Joel Was

Mr. Bednorz was told by his principal that Joel was an exceptional student, when in fact Joel had average ability. As a result, Mr. Bednorz gave Joel challenging assignments, gave more specific feedback, and in general assumed that Joel would do well in his class. Consequently, Joel performed above his ability level. This is an example of __________ effect.

A) teacher expectancy
B) context expectancy
C) multicultural
D) bilingual