And of all the artifacts that have aided cognition, the most important is the development of writing, or more properly, of notational systems: number systems, writing, calendars, notational systems for mathematics, engineering, music and dance.

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Darcia Narvaez, professor of psychology at the University of Notre Dame, studies moral cognition and development.

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In addition, we might be able to play immersive apps that incorporate the best video game mechanics into brain training programs to enhance cognition, perhaps allowing people to correct neural deficiencies and even delay the development of dementia.

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