An African Grey parrot, Alex, learned to report on the absence or presence of similarity and difference between two objects. Alex was shown pairs of objects that were (a) totally dissimilar, (b) identical, or (c) similar or different with respect to one of three attributes (color, shape, or material). In the first two cases, he responded to the respective queries of What\u27s same? or What\u27s different? with the vocalization none, and in the third case he responded with the appropriate category label ( color, shape, or mah-mah [matter]). His accuracy was 80.9% to 83.9% for pairs of familiar objects not used in training and 72.5% to 78.4% for pairs whose colors, shapes, and materials were unfamiliar. The data provide evidence th...
An African gray parrot (Psittacus erithacus), Alex, trained to label vocally collections of 1-6 simu...
This chapter briefly reviews what is known—and what remains to be understood—about Grey parrot vocal...
Among birds, corvids and parrots are prime candidates for advanced cognitive abilities. Still, hardl...
An African Grey parrot, Alex, learned to report on the absence or presence of similarity and differe...
During the past 24 years, I have used a modeling technique (M/R procedure) to train Grey parrots to ...
Physical cognition has generally been assessed in tool-using species that possess a relatively large...
Alex, a Grey parrot (Psittacus erithacus) who identifies the bigger or smaller of two objects by rep...
A Grey parrot (Psittacus erithacus) that was able to quantify 6 item sets (including subsets of hete...
.Some African grey parrots (Psittacus erithacus), the most famous being Pepperberg's parrot Alex, ar...
Perspective-taking is a cognitive ability that can be useful to access information during social int...
A grey parrot (Psittacus erithacus), able to label the color of the bigger or smaller object in a pa...
Abstract A comparative approach is required to investi-gate the evolutionary origins of cognitive ab...
Humans often have difficulty accurately evaluating the cognitive capacities of nonhuman animals. We ...
Our ability to make logical inferences is considered as one of the cornerstones of human intelligenc...
Pepperberg (The Alex studies: cognitive and communicative abilities of gray parrots. Harvard Univers...
An African gray parrot (Psittacus erithacus), Alex, trained to label vocally collections of 1-6 simu...
This chapter briefly reviews what is known—and what remains to be understood—about Grey parrot vocal...
Among birds, corvids and parrots are prime candidates for advanced cognitive abilities. Still, hardl...
An African Grey parrot, Alex, learned to report on the absence or presence of similarity and differe...
During the past 24 years, I have used a modeling technique (M/R procedure) to train Grey parrots to ...
Physical cognition has generally been assessed in tool-using species that possess a relatively large...
Alex, a Grey parrot (Psittacus erithacus) who identifies the bigger or smaller of two objects by rep...
A Grey parrot (Psittacus erithacus) that was able to quantify 6 item sets (including subsets of hete...
.Some African grey parrots (Psittacus erithacus), the most famous being Pepperberg's parrot Alex, ar...
Perspective-taking is a cognitive ability that can be useful to access information during social int...
A grey parrot (Psittacus erithacus), able to label the color of the bigger or smaller object in a pa...
Abstract A comparative approach is required to investi-gate the evolutionary origins of cognitive ab...
Humans often have difficulty accurately evaluating the cognitive capacities of nonhuman animals. We ...
Our ability to make logical inferences is considered as one of the cornerstones of human intelligenc...
Pepperberg (The Alex studies: cognitive and communicative abilities of gray parrots. Harvard Univers...
An African gray parrot (Psittacus erithacus), Alex, trained to label vocally collections of 1-6 simu...
This chapter briefly reviews what is known—and what remains to be understood—about Grey parrot vocal...
Among birds, corvids and parrots are prime candidates for advanced cognitive abilities. Still, hardl...