Background
Nativism: Kant and Descartes, human skills are inborn
Empiricism: Locke and Berkeley, Helmholtz,  skills
learned through experience or 'effort'
Constuctivism: Piaget, kids need to go through conceptual
development
Maturation: skills aquired after birth might not be
learning, but could be maturation of the brain
more modern approach – a mix - Fantz: using experiments
to determine the different development timelines for
different skills