Research methods designed for making careful, systematic observations are called ____

Middle adulthood begins around age _______ and ends around age _______.

Fill in the blank(s) with the appropriate word(s).

Seven-month-old Mazie is crawling toward the end of the bed

How likely is it that she will continue on and fall off? A) Unlikely, because depth perception develops by about 6 months of age in infants Correct. By the time infants are crawling, they are able to perceive (and usually avoid) a drop-off. The visual cliff has been used to study this perceptual ability in a variety of species. B) Unlikely, because her mother will probably stop her before she reaches the end C) Likely, because infants only use monocular cues when judging depth D) Likely, because depth perception develops later in childhood