Piaget observed that children at different ages show different abilities in tasks such as the conservation task that seem to be age-related. Piaget suggested that children experience sudden, qualitative changes in thinking and reasoning from birth through adolescence. Therefore, his theory of cognitive development suggests that developmental changes are .

Therefore, his theory of cognitive development suggests that developmental changes are discontinuous and occur in stages.

Explanation:

Psychologist Jean Piaget formulated the Theory of Cognitive Development. His theory suggests that developmental changes are discontinuous and occur in stages. Instead of there being a gradual, fluid process of development, in Piaget's theory children show different abilities according to the stage in which they are. Those stages are connected to their age, and the changes they bring are sudden. Therefore, there is a discontinuation, as if the second stage is supposed to happen at a certain time and in a certain manner, independently of the first stage, for instance. In his theory, there is a total of four developmental stages.

an unbound book has no cover; paris is a single man

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