A young child, Leo, is shown two identical rows of five coins spaced evenly. He agrees that both rows have the same number of coins. One of the rows is then stretched out so the coins are further apart. Leo now claims that the stretched-out row has more coins.
Identify the Piagetian cognitive ability that Leo is failing to demonstrate, and explain this concept with reference to the scenario.
59 exam-style questions on AQA A Level Psychology Piaget's theory of cognitive development. Each one has a worked solution and a mark scheme showing where the marks go.