Final answer:
The symbolic function substage occurs during the preoperational stage, while the intuitive thought substage occurs during the concrete operational stage in Piaget's theory of cognitive development.
Step-by-step explanation:
In Piaget's theory of cognitive development, the symbolic function substage occurs during the preoperational stage (2-7 years old), while the intuitive thought substage occurs during the concrete operational stage (7-11 years old).
In the symbolic function substage, children can use symbols to represent words, images, and ideas. They engage in pretend play and begin to use language. However, their logic is based on their own personal knowledge and they cannot understand adult logic or mentally manipulate information.
In the intuitive thought substage, children can think logically about real events. They have a firm grasp on numbers and can perform mathematical operations. They also understand the concept of conservation. However, their thinking is still concrete and they struggle with abstract ideas and hypothetical situations.