Catlin Developmental Timeline

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    Infancy: Age 0-2

    Infants are completely dependent on their carers for the first few years of their life, they are helpless and have little muscle co- ordination. Infants grow in size and weight. As time goes on, they also become better able to move themselves around and to manipulate objects.
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    Piaget's Stages of Cognitive Development: Sensorimotor Stage

    Age: 0-2
    Babies learn to coordinate sensation and perception with motor activity. They also development object permanence.
  • 4 Months

    4 Months
    Infants turns from stomach to side
  • Social Development: 4 months

    Around four months, babies start to feel feelings of attachment.
  • 5 Months

    5 Months
    Infants turns from stomach to back
  • 6 Months

    6 Months
    Infants turn from back to stomach
  • Social Development: 6-7 Months

    Babies attachment to their caregivers grow.
  • 8 Months

    8 Months
    Infants begin to sit
  • 9 Months

    9 Months
    Baby begins to crawl
  • Social Development: 8 months

    Some infants begin to develop stranger/separation anxiety when away from their caregivers
  • 11 Months

    11 Months
    Babies begin to kneel
  • 13 Months

    13 Months
    Babies are able to stand
  • 15 Months

    15 Months
    Babies begin to walk
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    Chilhood: ages 2-10

    Early childhood is the most and rapid period of development in a human life. The years from conception through birth to eight years of age are critical to the complete and healthy cognitive, emotional and physical growth of children. Children continue to grow rapidly and begin to develop fine-motor skills. They are also still dependent on their caregiver.
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    Piaget's Stages of Cognitive Development: Preoperational Stage

    Age: 2-7
    Children have one dimensional thinking skills. They also display egocentrism, artificialism, and animism
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    Piaget's Stages of Cognitive Development: Concrete Operational Stage

    Age: 7-12
    Children emit signs of adult thinking about specific objects but not abstract ideas. Their egocentrism is reduced.
  • Adolescent Growth Spurt

    Adolescent Growth Spurt
    The adolescent growth spurt usually lasts two to three years. During this time most adolescents grow 8 to 12 inches. Girls usually start growing at 10 or 11. Boys start growing about 2 years later than the girls.
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    Early Adolescence: Ages 11-14

    During early adolescence, puberty begins. Puberty refers to the specific developmental changes that lead to the ability to reproduce. This biological stage of development ends when physical growth does. Boys and girls develop different sex characteristics during this time. During this time, females usually mature. As they start to move from childhood into adulthood, adolescents feel the urge to be more independent from their families. They might ask for their friends advice over their parents.
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    Piaget's Stages of Cognitive Development: Formal Operational Stage

    Age: 12+
    Children are now capable of abstract thinking. They are also able to deal with hypothetical situations, strategize, and plan ahead to solve problems.
  • Menarche

    Usually occurs between the ages of 11 and 14 to girls. Menarche is a girls first period.
  • Peer Pressure: 15 years old

    Peer Pressure: 15 years old
    Peer pressure peaks at the age of 15.
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    Middle Adolescence: Ages 15-18

    Most girls have completed the physical changes related to puberty by age 15. Boys are still maturing and gaining strength, muscle mass, and height and are completing the development of sexual traits. Many teens may experience stress over school and test scores. They also want to spend more time with their friends rather then with their family. Adolescents also start to have relationships.
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    Late Adolescence Ages: 18-21

    Adolescents have a better sense of self, and they gradually become more emotionally stable. They also have a greater concern for others/ their purpose in life. They have also become self-reliant and able to make own decisions.
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    Young Adulthood: Ages 20-40

    The typical young adult is in good condition; physical and sensory abilities are usually excellent. An individual who has not developed a sense of identity usually will fear a committed relationship and may retreat into isolation. By this time, you are mostly, if not fully, developed.
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    Middle Adulthood: Ages 40-65

    During this time, people experience many physical changes that signal that the person is aging, including gray hair and hair loss, wrinkles and age spots. During this time a person may have a midlife crisis. These people are usually in a committed relationship with a family. One may also experience empty nest syndrome when their last kid moves out of the house.
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    Midlife Transition: Ages 40-45

    The midlife transition is a period in middle adulthood when people's perspectives change in a major way. Women tend to go through a midlife transition 5 years earlier then men do.
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    Menopause: From late forties to early fifties

    Menopause is the end of menstruation in a women. Women may experience hot flashes/discomfort during this time.
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    Late Adulthood: Age 65-

    In later adulthood, a variety of physiological changes may occur, including some degree of atrophy of the brain and a decrease in the rate of neural processes. Many people may develop dementia or Alzheimer's. Adults in late adulthood have had to make decisions about their retirement, how much time to spend with their children and grandchildren, and where they should live.