Two infants of different ages, Diego and Hannah, are tested with the preferential-looking technique to determine their visual acuity. A series of black-and-white-striped patterns are presented individually next to a gray square. Diego can distinguish stripes that are narrower than the stripes Hannah can distinguish. Compared with Hannah, Diego has
A) a smaller retina.
B) better object segregation.
C) more cones.
D) better contrast sensitivity.

Question

Quizplus · Accepted Answer

Diego is able to distinguish narrower stripes than Hannah, which indicates that he has better contrast sensitivity. This means that Diego can perceive differences in contrast between stripes and the background more easily than Hannah, suggesting that his visual system is more sensitive to contrast.

Two Infants of Different Ages, Diego and Hannah, Are Tested