while preadolescent is generally defined as those ranging from age 9 to 12 years.Preadolescence may also be defined as the period from 10 to 13 years.

The point at which a child becomes an adolescent is defined by the major onset of puberty. However, in some individuals (particularly females), puberty begins in the preadolescence years. Studies indicate that the onset of puberty has been one year earlier with each generation since the 1950s.

One can also distinguish middle childhood and preadolescence -

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