How do their basic assumptions compare?

How did each view the role of the individual? Culture?

How did each view the relationship between development and learning?

Did they both believe in invariant stages?

How did each interpret children's tendency to talk to themselves?

How did each view the role of adults or others in the process of development?

How did their approaches to describing development differ?

What type of educational approach would each advocate?

How would each view attempts by others to accelerate development?