Another term for what is commonly called lazy eye is __________

Prior to the early twentieth century, high schools were designed:

A. to keep delinquent children out of trouble. B. for elite youngsters. C. to offer vocational instruction. D. to provide general education.

Marcy is trying to define anxiety in a way that can be empirically tested. She is attempting to find an appropriate __________

a) hypothesis. b) operational definition. c) double-blind study. d) theory.