By 3 months of age, scanning is more organized, efficient, and centered on important aspects of a stimulus. Thus. when 3-month-olds look at a face, they scan the eyes and mouth regions, which contain more information 1212 By 3 months of age, scanning is more organized, efficient, and centered on important aspects of a stimulus. Thus, when 3-month-olds look at a face, they scan the eyes and mouth regions, which contain more information