You Are Being Placed on a Large Piece of Glass

Multiple Choice

You are being placed on a large piece of glass with a checkerboard-patterned platform underneath it. Your mother walks to the other side of this platform and calls for you to crawl to her. Many years later, you will discover that this was all part of an experiment to test your

A) visual acuity.
B) ability to recognize your mother.
C) motor development.
D) depth perception.