Instead of "intelligence," some people prefer to speak of "awareness." In any case, cetace

ans probably have a very different awareness and perception of their environment than do humans. Maybe one day we will come to understand cetaceans on their terms instead of ours, and perhaps we will discover a mental sophistication rivaling our own.

A．This type of learning, however, is called conditioning. This reward is merely one possible type of positive reinforcement that leads to more frequent repetition of the behavior. in the future. The animal simply learns that when it performs a particular behavior, it gets a reward, usually a fish.Many animals, including rats, birds, and even invertebrates, can be conditioned to perform. tricks.We certainly don"t think of these animals as our mental rivals.Unlike most other animals, however, dolphins quickly learn by observations and may spontaneously imitate human activities. One tame dolphin watched a diver cleaning an underwater viewing window, seized a feather in its beak, and began imitating the diver—complete with sound effects! Dolphins have also been seen imitating seals, turtles, and even water-skiers.

B．This type of learning, however, is called conditioning.The animal simply learns that when it performs a particular behavior, it gets a reward, usually a fish. This reward is merely one possible type of positive reinforcement that leads to more frequent repetition of the behavior. in the future. Many animals, including rats, birds, and even invertebrates, can be conditioned to perform. tricks.We certainly don"t think of these animals as our mental rivals.Unlike most other animals, however, dolphins quickly learn by observations and may spontaneously imitate human activities. One tame dolphin watched a diver cleaning an underwater viewing window, seized a feather in its beak, and began imitating the diver—complete with sound effects! Dolphins have also been seen imitating seals, turtles, and even water-skiers.

C．This type of learning, however, is called conditioning.The animal simply learns that when it performs a particular behavior, it gets a reward, usually a fish.Many animals, including rats, birds, and even invertebrates, can be conditioned to perform. tricks. This reward is merely one possible type of positive reinforcement that leads to more frequent repetition of the behavior. in the future. We certainly don"t think of these animals as our mental rivals.Unlike most other animals, however, dolphins quickly learn by observations and may spontaneously imitate human activities. One tame dolphin watched a diver cleaning an underwater viewing window, seized a feather in its beak, and began imitating the diver—complete with sound effects! Dolphins have also been seen imitating seals, turtles, and even water-skiers.

D．This type of learning, however, is called conditioning.The animal simply learns that when it performs a particular behavior, it gets a reward, usually a fish.Many animals, including rats, birds, and even invertebrates, can be conditioned to perform. tricks.We certainly don"t think of these animals as our mental rivals. This reward is merely one possible type of positive reinforcement that leads to more frequent repetition of the behavior. in the future. Unlike most other animals, however, dolphins quickly learn by observations and may spontaneously imitate human activities. One tame dolphin watched a diver cleaning an underwater viewing window, seized a feather in its beak, and began imitating the diver—complete with sound effects! Dolphins have also been seen imitating seals, turtles, and even water-skiers.