Piaget's approach was quite successful in describing cognitive development, but many researchers have argued that Piaget underestimated children's abilities, partly because of the limited nature of the mini-experiments he conducted true or false

That statement is true.

Explanation:

Piaget divided the cognitive development into different age groups.This make many experts see that  His theory is based on the assumption that the cognitive development among children is mostly influenced by genetic factors.

Researchers who criticized Piaget's work argued that children abilities can be heavily influenced by environmental factors too. For example, younger Children who are given proper education by the parents will have a more advanced cognitive development compared to older children who did not receive proper education.

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