Irene Pepperberg has been working with an African grey parrot named Alex. Her research has revealed that
A) Alex is able to make requests and to answer simple questions about objects.
B) Alex's linguistic abilities are limited to the "parroting" of phrases that he has heard Irene speak.
C) Alex shows no evidence of cognitive abilities, because his brain is the size of a walnut.
D) Alex is capable of addition, subtraction, multiplication, and division problems, showing an innate understanding of numbers.

Question

Quizplus · Accepted Answer

Irene Pepperberg's research has shown that Alex is able to comprehend and use language in a sophisticated way. He is able to make requests, answer questions about objects, and even express some emotions. This suggests that Alex has a level of cognitive ability beyond simple mimicry.

Irene Pepperberg Has Been Working with an African Grey Parrot