Grey parrot (Psittacus erithacus) numerical abilities: Addition and further experiments on a zero-like concept
Publication/Journal: Journal of Comparative Psychology
Keywords: animals, cognition, cognition/physiology, concept formation, concept formation physiology, cues, intelligence, male, mathematics, parrots, parrots physiology
2006
Ordinality and inferential abilities of a grey parrot (Psittacus erithacus)
Publication/Journal: Journal of Comparative Psychology
Keywords: animal vocalization, animals, association learning, color perception, comprehension, concept formation, discrimination learning, mathematics, parrots, problem solving, psychophysics, size perception, symbolism, visual pattern recognition
2006
Choosing and Using Tools: Capuchins (Cebus apella) Use a Different Metric Than Tamarins (Saguinus oedipus)
Publication/Journal: Journal of Comparative Psychology
Keywords: *choice behavior, animal behavior, animal behaviour, animals, cebus, choice behaviour, mathematics, saguinus, species specificity
2005
On-farm assessment of the effect of management and housing type on behaviour and welfare in dairy cattle
Publication/Journal: Animal Welfare
Keywords: animal welfare, behaviour, dairy cows, welfare assessment
2003