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Resting heart rate is usually between 80 and 160 beats per minute, and it typically stays within that range until the infant is about one year old. [18] Motor development. Can hold up head and chest while in prone position. [24] Movements of arms and legs become smoother. [25] Can hold head steady while in sitting position. [24]
The Gesell Developmental Schedules claimed that an appraisal of the developmental status of infants and young children could be made. The Gesell Developmental Schedule believes that human development unfolds in stages, or in sequences over a given time period. These stages were considered milestones, or the manifestations of mental development. [1]
Some age-related development periods with defined intervals include: newborn (ages 0 – 2 months); infant (ages 3 – 11 months); toddler (ages 1 – 2 years); preschooler (ages 3 – 4 years); school-aged child (ages 5 – 12 years); teens (ages 13 – 19 years); adolescence (ages 10 - 25 years); college age (ages 18 - 25 years).
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.
Early childhood development is the period of rapid physical, psychological and social growth and change that begins before birth and extends into early childhood. [1] While early childhood is not well defined, one source asserts that the early years begin in utero and last until 3 years of age. [1]
In psychology, developmental stage theories are theories that divide psychological development into distinct stages which are characterized by qualitative differences in behavior. [ 1 ] There are several different views about psychological and physical development and how they proceed throughout the life span.
At 10 months, this accuracy improves, [6] and infants are also more discerning in their response to joint attention. For example, at this age, a 10-month-old will not look in the same direction as an adult if that adult's eyes are closed, a mistake that younger children make. [13] Initiation of joint attention begins at approximately 1 year old ...
Behavior analysis in child development takes a mechanistic, contextual, and pragmatic approach. [6] [7] From its inception, the behavioral model has focused on prediction and control of the developmental process. [8] [9] The model focuses on the analysis of a behavior and then synthesizes the action to support the original behavior. [10]