<Li> Vision is significantly worse in infants than in older children . Infant sight tends to be blurry in early stages but improves over time . Color perception similar to that seen in adults has been demonstrated in infants as young as four months, using habituation methods . Infants get to adult - like vision in about six months . </Li> <Li> Hearing is well - developed prior to birth, unlike vision . Newborns prefer complex sounds to pure tones, human speech to other sounds, mother's voice to other voices, and the native language to other languages . Scientist believe these features are probably learned in the womb . Infants are fairly good at detecting the direction a sound comes from, and by 18 months their hearing ability is approximately equal to an adult's . </Li> <Li> Smell and taste are present, with infants showing different expressions of disgust or pleasure when presented with pleasant odors (honey, milk, etc .) or unpleasant odors (rotten egg) and tastes (e.g. sour taste). Newborns are born with odor and taste preferences acquired in the womb from the smell and taste of amniotic fluid, in turn influenced by what the mother eats . Both breast - and bottle - fed babies around 3 days old prefer the smell of human milk to that of formula, indicating an innate preference . There is good evidence for older infants preferring the smell of their mother to that of others . </Li> <Li> Touch and feel is one of the better - developed senses at birth considering it's one of the first senses to develop inside the womb . This is evidenced by the primitive reflexes described above, and the relatively advanced development of the somatosensory cortex . </Li>

Which psychologist first identified a process of development in moral judgment