Who was the astronomer who suggested that the earth revolves around the sun 1700 years before Copernicus?

When should the naturalistic observation method be employed?

a. When studying unique individuals b. For experimental results c. When maximum control is desired d. For ecological validity

One way of describing Piaget's and Vygotsky's views of childhood would be to note that Piaget saw children as ___________ whereas Vygotsky saw them as ____________

a. competent; incompetent b. little scientists; apprentices c. egocentric; sociocentric d. preoperational; postoperational