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Physical, Perceptual, and Language Development

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Briana Freeman

on 7 March 2014

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Transcript of Physical, Perceptual, and Language Development

Physical, Perceptual, and Language Development
Developmental Psychology
the study of how an individual's physical, social,emotional, moral and intellectual growth and development occur in sequential interrelated stages throughout the life cycle

Nature Vs Nurture

Some believe that behavior is a result of inheritance or genetics
Others believe that behavior is a result of experience and learning
Development begins long before an infant is born
At birth a newborn ad the ability to see, hear, smell and respond to the environment
newborns are capable of certain inherited, automatic, coordinated movement patterns called reflexes
Capable reflexes
grasping reflex-
response to a touch on the palm of the hand. infant can grasp any object , such as a finger, so strongly they can be lifted into the air
rooting reflex-
if an alert newborn is touched anywhere around the mouth, he will move his head toward the source of the touch
Physical Development
average infant weighs 7.5 pounds at birth
Then about 20 to 25 pounds by the end of the first year
within two years an infant can start to walk and talk
Physical and motor development
1 2 3 4 5 6 7 8 9 10 11 12
(2 months)
raise head to 45 degrees
(2.8 months)
Roll over
(4 months)
sit with support
(5.5 months)
sit without support
(7.6 months)
pull self to standing position
(9.2 months) walking holding on to furniture
(10 months)
(11.5 months)
Stand alone
(12.1 months)
Perceptual Development
Newborns have mature perception skills
illusion of a cliff like drop off experiment showed that young infants were unafraid, but older infants experienced in crawling refused to cross over the cliff
Development of Language
year 1
babbling begins and increases; by year's end, infant masters sounds of own language and usually say 1st word ex.) baba, mama
year 2
infant will progress to say dozens of words; paired words, ask questions, rising tone
Ex.) More ball., Jenny go?
year 3
acquires more grammatical knowledge; appropriate sentences;average vocabulary size about 400 Ex.) Don't go., I'm eating.
year 4
uses more grammatical rules and future tense; average vocabulary over 1000 words
Ex.) Will Jenny go?, I can't go.
year 5
uses more complex clauses; join two or more ideas in one sentence Ex.) I see what you did.
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