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What does the phrase “A not B error” mean?

Before puberty, children suffering left hemisphere injuries frequently recover much of their speaking ability.

In the sixth sub stage of Piaget’s sensor I motor period, external exploration is replaced by mental exploration.

The story of Genie, locked alone in a small room until she was 13 years old, illustrates that there is a sensitive period for language learning.

The imitation reflex may contribute to caregiver–infant bonding and newborn survival.

By what age will a child demonstrate coordination of secondary schemes?

Words expressing movement are rarely found in children’s early speech.

Infant IQ scores reliably predict adult IQ scores.

Of the following sub stages in Piaget’s sensor I motor period, which is the most cognitive advanced?

I have __________ to give away to charity.