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phase (birth to age 2 years)
Preoperational phase (ages 2–7
Concrete operational phase (ages 7–12
Formal operational phase (age 12 years and
mind forms representations of what is perceived.
The day's representations are stored
in short-term memory.
The mind "erases" representations
that have little emotional content and stores representations that
have high emotional content.
The stored representations become long-term