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HISTORICAL BACKGROUND For most of the Twentieth Century , the dominant approach to animal psychology was to use experiments on Intelligence In Animals to uncover simple processes (such as Classical Conditioning and Operant Conditioning ) that might then account for the apparently more complex intellectual abilities of human beings. This reductionist philosophy was combined with a strongly Behaviorist methodology, in which overt behavior was taken as the only valid data for the study of psychology, and in its more extreme forms (the Radical Behaviorism of B. F. Skinner and his Experimental Analysis Of Behavior ) behavior was taken as the only topic of interest. In effect, the mental processes that we experience in ourselves were viewed as Epiphenomena . The success of Cognitive Psychology in addressing human mental processes, from the late 1950s on, led to a re-evaluation of the research paradigm, and researchers began to address animal mental processes from the opposite direction, by taking what is known about human mental processes and looking for evidence of comparable processes in other species. In a sense this was a return to the approach of Darwin's protegé George Romanes , arguably the first comparative psychologist of the modern era. However, whereas Romanes relied heavily on anecdote and an anthropomorphic projection of human capacities onto other species, modern researchers in animal cognition are in most cases firmly behaviorist in methodology, even though they differ sharply from the behaviourist philosophy. There are some exceptions to the rule of behaviourist methodology, such as John Lilly and, some would argue, Donald Griffin , who have been prepared to take a strong position that other animals do have Mind s and that we should approach the study of their cognition accordingly. However their claims have not found wide acceptance in the scientific community, though they have attracted an enthusiastic following among lay people. The development of animal cognition was also strongly influenced by:
This account of the history of the study of animal cognition is inevitably oversimplified. From Romanes on, there have always been comparative psychologists who have been more or less cognitively inclined: obviously examples are Wolfgang Köhler , famous for his studies of Insight in chimpanzees, and Edward C. Tolman , who introduced into psychology, as an explanation of the behaviour of rats in mazes, two ideas that have been immensely influential in human cognitive psychology - the Cognitive Map and the idea of decision-making in Risky Choice according to Expected Value . METHODOLOGY Research in animal cognition continues to use some of the established research techniques of comparative psychology and the experimental analysis of behavior, such as mazes and has harnessed her unique expertise in animal welfare and the ethical treatment of farm livestock to highlight underlying similarites between humans and other animals. RESEARCH QUESTIONS Given the broad programme of animal cognition, of looking for the animal analogues of human cognitive processes, the areas of study in animal cognition follow more or less from those in human cognitive psychology. However progress in the different areas has been variable. Among the fields of interest are: Attention Research has focused on animals' ability to distribute attention between different aspects of a stimulus, and on Visual Search . As in humans, it appears that sharing Attention between stimulus features reduces the capacity to detect any one of them, though there are some ecologically relevant visual search tasks at which particular species show remarkable abilities (for example, pigeons have an extraordinary capacity to pick out grain from substrate). Categorisation Following pioneering research by Richard Herrnstein , there has been a mass of research on birds' ability to discriminate between categories of stimuli, including the kinds of ill-defined category that are used in everyday human speech. Birds have been found to learn this kind of task easily, and to transfer correct responses readily to new instances of the categories. Memory The categories that have been developed to analyse Human Memory ( Short Term Memory , Long Term Memory , Working Memory ) have been applied to the study of animal memory, and some of the phenomena characteristic of human short term memory (e.g. the serial position effect) have been detected in animals particularly Monkey s. However most progress has been made in the analysis of Spatial Memory , partly in relation to studies of the physiological basis of spatial memory and the role of the Hippocampus , and partly in relation to Scatter-hoarding animals such as Clark's Nutcracker , certain Jay s, and certain Squirrel s, whose ecological niches require them to remember to locations of thousands of caches, often following radical changes in the environment. Tool use There are some species that use particular tools as an essential part of their Foraging behaviour, for example the Woodpecker Finch of the Galapagos Islands . However these behaviours are often quite inflexible and cannot be applied effectively in new situations. Several species have now been shown to be capable of more flexible tool use. A well known example is Jane Goodall's observation of chimpanzees "fishing" for Termite s in their natural environment, and captive great apes are often observed to use tools effectively; several species of Corvid s have also been trained to use tools in controlled experiments, or use bread crumbs for bait-fishing {Link without Title} . Reasoning and problem solving Closely related to tool use is the study of reasoning and problem solving. Many of the data on these issues come from earlier comparative psychologists such as Wolfgang Köhler, rather than recent experiments. It is clear that animals of quite a range of species are capable of solving a range of problems that are argued to involve abstract reasoning; modern research has tended to show that the performances of Köhler's chimpanzees, who could achieve spontaneous solutions to problems without training, were by no means unique to that species, and that apparently similar behaviour can be found in animals usually thought of as much less intelligent, if appropriate training is given. Language The modeling of human language in animals is known as Animal Language research. In addition to the ape-language experiments mentioned above, there have also been more or less successful attempts to teach language or language-like behaviour to some non-primate species, including the parrot Alex, and Great Spotted Woodpecker s. Louis Herman published research on artificial language comprehension in the bottlenosed dolphin using cognitive research methods at the height of the skepticism produced by Herbert Terrace's criticism of chimpanzee language experiments through his own results with the animal Nim Chimpsky . In particular, the focus on the ''comprehension'' mode only allowed cognitive methods of utilizing blinded observers to grade the animals' gross physical behavior, rather than trying to interpret putatitive language ''production''. Herman's results (Herman, Richards, & Wolz, 1984) were published in the (human) journal ''Cognition'', regarding work on the dolphins Akeakamai and Phoenix.yellow Consciousness The sense in which animals can be said to have Consciousness or a Self-concept has been hotly debated; it is often referred to as the debate over Animal Mind s. The best known research technique in this area is the Mirror Test devised by Gordon Gallup, in which an animal's skin is marked in some way while it is asleep or sedated, and it is then allowed to see its reflection in a mirror; if the animal spontaneously directs grooming behaviour towards the mark, that is taken as an indication that it is aware of itself. Self-awareness, by this criterion, has been reported for chimpanzees and also for some other great apes, and some cetaceans, but not for monkeys. However both the interpretation of such data, and the data themselves, remain controversial. Deception, empathy, and theory of mind Related to the issue of self-consciousness is the question of whether an animal can show Empathy , i.e. can understand what another animal is thinking. It is usually argued that to show empathy requires you to have a Theory Of Mind , i.e. to attribute mental processes to other individuals, and that without a theory of mind it is impossible for an animal or person to show Tactical Deception . Experiments to test for theory of mind in animals have mainly been carried out on primates. No convincing evidence has been found for theory of mind in any primate species other than the great apes; the interpretation of the data from great apes is currently controversial, but some researchers are convinced that they do show theory of mind. CONTINUING CONTROVERSY The broad programme of research into animal cognition has achieved a good deal. Nonetheless, its results and philosophy continue to be debated, on a number of grounds:
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