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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]
Developmental milestones [3] [4] Age Motor Speech Vision and hearing Social 1–1.5 months When held upright, holds head erect and steady. Cooes and babbles at parents and people they know Focuses on parents. Loves looking at new faces; Starts to smile at parents; Startled by sudden noises; Recognition of familiar individuals; 1.6–2 months
In March 2010, the Gesell Institute completed a three-year nationwide study which included some 1,300 assessments of children ages 2 years 9 months to 6 years 3 months. The study included a sample of public, private, urban, and suburban schools, 55 sites spanning 23 US states participated in the study.
Newmeyer suggests parents download the CDC's free milestone tracker app, which can help parents keep tabs on their child's development from ages 2 months through 5 years old.
In addition, the mid parental height (MPH) is used to calculate the expected height potential and interpret the growth curve of a child. [3] The following calculations are used for males and females respectively: Male = (father’s height + mother’s height + 13 cm)/2 Female = (father’s height-13 cm + mother’s height)/2. [3]
“Developmental milestones are important to parents because they are a baby or child’s 'first time' doing something and an indicator that one’s child is developing normally,” says Dr ...
By about 8–12 months, they go through a fairly rapid change and become fearful of perceived threats. [113] By around 6–36 months, infants begin to prefer familiar people and show anxiety and distress when separated from them, and when approached by strangers. [114] Separation anxiety is a typical stage of development to an extent.
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