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    Psychology A-Level

    Critical Period

    What Critical Period means in Psychology A-Level, as defined for Pearson Edexcel.

    Definition of Critical Period

    A biologically determined window (approximately 0-2.5 years) during which an attachment must form to avoid permanent developmental damage.
    Pearson Edexcel · Topic 7: Child psychology

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    Using Critical Period in the exam

    Definition questions usually carry one or two marks, and examiners look for the precise wording. Write the definition from memory, check it against the version above, and then use the term in a longer answer on the same topic so it sticks.

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