oVisual acuity of a newborn – 20/200 and 20/400; they can only see things within 8 inches of their field of view.oBy the age of 2, their visual acuity reaches 20/20oA baby’s color vision is not well developed at birth. Infants can perceive color by 3-4 months. They can see black and white and red. They can only see the color blue at the age of 2-4 months.oVision acuity is the same by the 1stbirthday as that of an adult and they are now able to see the world colors – the cones in the retina are fully developed.oVisual Tracking:Following the object with your eye. By 6 weeks, they are doing well. By 10 weeks, they have mastered it. The main thing that they are tracking is the mother’s face since they have a preference for that.Experiments:1.In the experimental group, pregnant women drank carrot juice 4 times a week.In the control group, pregnant women drank water only. 4 weeks after they are introduced to solid food, the babies were presented with a cereal that was made with either water or carrot juice. As expected, the babies whose mother drank carrot juice were more likely to eat the cereal made with carrot juice.2.A researcher found that a baby made more facial expressions when the photo was taken when they were given a sour or bitter taste. When they were given a sweet taste, they made a pleasant face. It was concluded that babies can distinguish between the four taste buds.3.To measure visual acuity, researchers display a uniform grey block and a series of black and white stripes. The stripes get narrower and narrower – measuring their visual acuity.As long as they look at the series of stripes, then they are displaying the necessary visual acuityat the specific range. When they look at both equally, they are no longer able to distinguish the stripes of the patterned stimuli. The results indicate that infants of 1 month or less see at 6 meters what adults see 60-120 metres.4.In an experiment to test the intersensory redundancy theory, infants were able to detect a change in emotional expression at 4 months when it was presented in multiple sensory modes than when it was presented in a single mode at 7 months.5.In an experiment, newborn babies were given a soother and the sucking behavior was measured. They suck in bursts followed by a rest period. The babies learned to extend the rest period to hear more of mom’s voice. In other
cases, the rest period was conditioned to be reduced to hear less of mom’s voice.6.In an experiment, it was concluded that babies prefer to listen to speech over non-speech. They can discriminate between languages that have different rhythmic structures (i.e. French).Complex Perceptual and Attentional Processes Perceptual processes determine that certain features go together to form objects.
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- Fall '13
- Working Memory