Twelve-Month-Old Claude Has Just Crawled to the Edge of a Deep

Multiple Choice

Twelve-month-old Claude has just crawled to the edge of a deep, empty swimming pool. If Claude is like most children his age, he will:

A) Stop crawling forward, and possibly move away from the edge
B) Find the sharp dropout quite fascinating and lean forward to look down
C) Continue crawling because his perceptual abilities don't allow him to detect the dropout
D) Continue crawling because, although he can perceive the drop-off, he hasn't yet developed a fear of heights