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2 May 2016 Alain Riguidel has been appointed president of Kering Luxury Watch, the regional brand director for Piaget Latin America and Caribbean. 20 Dec 2013 20 Dec 2013 15 Oct 2018 Piaget's stages are: Sensorimotor stage: birth to 2 years. Preoperational stage: ages 2 to 7. Concrete operational stage: ages 7 to 11.21 Apr 2013 Jean Piaget (1896-1980) was a Swiss developmental psychologist. While he made many contributions to the field, his most notable is his In studying the cognitive development of children and adolescents, Piaget identified four major stages: sensorimotor, preoperational, concrete operational and formal operational. Piaget believed all children pass through these phases to advance to the next level of cognitive development.