At 21 months of age, Pierre has acquired a symbolic thinking system, So he is in substage 6 - mental combinations.
What are the sensorimotor stage and substage 6?
- Sensorimotor development typically occurs within the first two years of a child's life.
- It is distinguished by the child's discovery of the distinction between themselves and their surroundings.
- At that point, they will use their senses to learn about themselves and their surroundings.
- The sixth stage is mental combos (toddlers between 18 and 24 months).
- True problem solving emerges at this stage when toddlers can mentally consider solutions before acting.
- Simple reflexes, primary circular reactions, secondary circular reactions, reaction coordination, tertiary circular reactions, and early symbolic thought are all substages of the sensorimotor stage of development.
Therefore, at 21 months of age, Pierre has acquired a symbolic thinking system, So he is in substage 6 - mental combinations.
Know more about the sensorimotor stage here:
https://brainly.com/question/8979687
#SPJ4
