Studies That Have Examined the Use and Understanding of Number

Studies that have examined the use and understanding of number (such as Izard et al., 2009) by using visual and acoustic information have found:

A) infants under 1 year cannot process the competing forms of information simultaneously
B) infants must be at least 6 months of age to understand visual and acoustic number
C) newborn infants cannot recognize the difference between numbers because of poor vision
D) newborn infants can recognize the difference between numbers like 4 and 12