What are the three phases children go through when developing close friendships?

Which of the following explains the special nature of the perception of biological motion?

a) Biological motion is the only type of visual motion humans can produce as well as perceive b) Most people spend more time perceiving and trying to make sense of other people's motion than any other form of visual motion. c) Other people's movements are a rich source of social and emotional information d) All of the above

The Binet-Simon scale was originally developed to ______

a. identify gifted children b. identify children who might have difficulty in school c. measure the intelligence of normal children d. measure scholastic achievement