Baby Todd's mother notices that he makes a variety of sounds including cooing, crying, gurgling, and murmuring, along with facial expressions, gestures, imitation, and other nonlinguistic means. Baby Todd is demonstrating

Which of the following is a benefit of using a repeated measures design?

A) Fewer participants are needed B) Each participant is exposed to only one condition C) Participants can be tested at the same time D) Participants are randomly assigned to one condition

Which of these species has shown the greatest ability to use symbols to communicate?

a. Whales b. Pandas c. Bonobos d. Pigeons