500
Of the following, Irene Pepperberg's research with Alex the African Grey parrot showed that birds could do all of the following except:
a.) Accurately use over 100 English words to describe shape, color, material, and number.
b.) Do simple math and understand the concept of "none", same/different, and bigger/smaller.
c.) Type words on a keyboard.
d.) Respond to optical illusions in the same way as humans.
What is c.) type on a keyboard.
Alex and Dr Pepperburg were the first to scientifically demonstrate many of the cognitive abilities of birds, including inferential reasoning, and counting and arithmetic abilities similar to that of a four and a half year old human child. He never learned to type or write, though.