While sitting with her parents in a restaurant waiting for s…

While sitting with her parents in a restaurant waiting for service, four-year-old Elana watches as the waitress walks by without taking their order. “Mommy,” she whines to her mother, “why isn’t she talking to us when I’m so hungry?” Elana’s belief that the waitress must know how hungry she is demonstrates the Piagetian concept of ___________

Marcus wants to know whether or not his daughter, Rebekah, c…

Marcus wants to know whether or not his daughter, Rebekah, can perceive different distances and depths. He wants to fashion a simple experiment to make this conclusion. Based on the work of Gibson and Walk, what sort of contraption could he build to test Rebekah’s depth perception?