2. About Rio A Californian sea lion (born in 1985) She is known for learning to match many pairs of symbols through trial and error, with fish as positive reinforcement
4. Results She responded correctly the first time she was given the same type of choice with every group of symbols!! Rio is the first nonhuman creature that is known to display a basic kind of logical thinking.
5. "It was almost hard to believe" Many scientists believed that the ability to make these connections, known as "equivalence," was a uniquely human characteristic, impossible without spoken language. Instead, it may be an essential building block for language.
6. Otherexperiment Also he wastestedonhermemory Shewastaughtto do pairswith symbols whenshewas 6 yearsold. She spent the next 10 years learning new tasks, without a single reminder of this older one 10 yearslatershewastestedtoseeifshestillremembered