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The Bayley Scales of Infant and Toddler Development (version 4 was released September 2019) is a standard series of measurements originally developed by psychologist Nancy Bayley used primarily to assess the development of infants and toddlers, ages 1–42 months. [1]
The Gesell Development Schedule operates off what is known as an individual's developmental quotient, or otherwise known as DQ. The DQ is determined according to the scores of the test and is evaluated by ascertaining whether or not the infant or child is displaying the appropriate behavior for the age (The individual's developmental quotient ...
They adjust their grip based on touch at 8 months, not yet visual cues. ... Walking development [38] Young toddlers (12 months) have a wider midfoot than older ...
The Tanner scale (also known as the Tanner stages or sexual maturity rating (SMR)) is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external primary and secondary sex characteristics , such as the size of the breasts ...
Parents play a large role in a child's activities, socialization, and development; having multiple parents can add stability to a child's life and therefore encourage healthy development. [5] Another influential factor in children's development is the quality of their care.
By 42 months, children are able to describe their likes and dislikes, suggesting a developing awareness of what elicits positive and negative emotions in themselves. [6] By 5 years old, children demonstrate agreement with their mothers' ratings of their behavior on basic behavioral indicators of personality.
Inspired by Theosophy, Rudolf Steiner (b.1861) had developed a stage theory based on seven-year life phases. Three childhood phases (conception to 21 years) are followed by three stages of development of the ego (21–42 years), concluding with three stages of spiritual development (42-63). The theory is applied in Waldorf education [15]
This was confirmed by researchers who first studied mothers' behavior towards 8-month-old infants and later tested the infants' vocabulary when they were 15 months old. [20] A first important development of infants is the discovery that they can influence their parents through babbling (development of intentional communication). [20]