Piaget developed four stages of cognitive development: sensorimotor, preoperational, concrete operational, and formal operational. In the preoperational stage from ages 2 to 7, children develop symbolic thinking and language skills but are still egocentric. Studies have shown that how questions are asked can impact whether young children can demonstrate conservation, understanding that quantities remain the same despite changes in appearance. Piaget's theory was influential but had limitations such as underestimating the impact of culture and skills being learned through social interaction rather than isolated development.

6. http://condor.depaul.edu/~lcamras/demotxt.htm (Example of object permanence)

10. QUESTIONS WHY CAN’T CHILDREN IN PIAGET’S PREOPERATIONAL STAGE CONSERVE? CAN CHILDREN IN THIS STAGE BE TAUGHT TO CONSERVE? ?

12. = What is CONSERVATION? “ the awareness that a quantity remains the same despite a change in its appearance”

13. Do you have more blocks or do I have more blocks or do we have the same amount of blocks? Make sure that the children do not fail to conserve because they do not understand the terms used in the questions- Piaget has been criticized for using difficult questions.

22. Sourced from; http://www.virtualpsychology.co.uk/index.php