Tshepiso agrees to exchange her whole pear for two halves because she knows that this is a fair exchange. According to the Piagetian theory of development, Tshepiso demonstrates development of: 1) Subitising 2) Ordering 3) Seriation 4) Conservation
Chepiso agrees to trade his entire pear for two halves because she knows he is showing an example of subitization.
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