CAS PS 241 Lecture Notes - Lecture 2: Approximate Number System, Almost Surely, Number Sense
10 Jan 2017
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Infants can track small numbers of objects: and can compare large number systems to a certain degree. Alternative systems: torres straight counting system, yupno counting system. Counting, about 3 years: track precise numbers of objects, a one knower, a two knower. Why are they failing: think about what they can do? o children can count to ten, have number words o can track 1,2,3,4 objects o can approximate and compare large numbers, learning the meaning of numbers o 1. Children learn to recite partial counting sequence. Don"t know the meanings of any number words o 2. Shortly after 2nd birthday, children learn meaning of one. Give a number: give 1 for one and a random amount for two, three four, etc o 3. 6 to 9 months later, they learn the meaning of two. Give a number: give 1 for one and 2 for two and a random amount for three, four, etc o 4.
