According to Jean Piaget's theory of cognitive development, in which stage does the quality of 'conservation' develop?

→ According to Piaget, during the first stage of development (birth to approximately 2 years of age), an infant learns best: → Under Jean Piaget's theory of cognitive development, upon detailed analysis of the essential and logical limitations of the 'Preoperational Stage', which of the following statements is scientifically most valid regarding the concepts of 'Egocentrism', 'Irreversibility', and 'Animism'? → According to Piaget, in which stage of cognitive development does a child begin to think logically about concrete objects and events? → According to Jean Piaget's theory of cognitive development, when a child attempts to fit new information into pre-existing schemas without modifying them, what is this cognitive process called? → According to Jean Piaget, which age group corresponds to the 'concrete operational stage' of cognitive development? → According to Jean Piaget's theory of cognitive development, in which stage does the trait of 'Object Permanence' develop in children? → The four stages of children's intellectual development (sensorimotor, preoperational, concrete operational, and formal operational) were identified by whom? → According to Jean Piaget's theory of cognitive development, what is the age range of the 'Formal Operational Stage'?