Perceptual Development By ehutch Period: Jan 1, 2012 to Dec 31, 2012 Perceptual Development Period: Jan 1, 2012 to Feb 28, 2012 After 2 months The child can determine different levels of brightness. Period: Jan 1, 2012 to Mar 30, 2012 After 3 months The child can now distinguish faces. Period: Jan 1, 2012 to Apr 30, 2012 After 4 months The child can now localize sounds with what made them. Period: Jan 1, 2012 to Dec 31, 2012 After 12 months The child's vision has fully developed into that of an adults.