Not all emerging adults reach the same advanced level in cognition because of the variety of education received during this age period.

The learning is possible only within a limited age period, known as a critical period.

The exhibition is permanent, the main focus being on the Medieval age period.

Fascism identifies the physical age period of youth as a critical time for the moral development of people that will affect society.

Parents should not force the child to sit, crawl, or walk a certain way during this age period.

For each stage of development the child forms a view of reality for that age period.

Barrows of this kind are usually assumed to date from the neolithic or bronze age period.

His reign falls within the "dark age" period of Assyrian history.

This corresponds to the age period of 12.500 to 10.500 years BP.

Bowlby's concepts included the idea that attachment involved learning from experience during a limited age period, influenced by adult behaviour.