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	Author	Beran, M.J.; Beran, M.M.; Harris, E.H.; Washburn, D.A.
	Title	Ordinal judgments and summation of nonvisible sets of food items by two chimpanzees and a rhesus macaque			Type	Journal Article
	Year	2005	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	31	Issue	3	Pages	351-362
	Keywords	Animals; Behavior, Animal; Chi-Square Distribution; Cognition; Color Perception/physiology; Female; Food; Judgment/physiology; Macaca mulatta; Male; Pan troglodytes; Serial Learning/*physiology; Size Perception
	Abstract	Two chimpanzees and a rhesus macaque rapidly learned the ordinal relations between 5 colors of containers (plastic eggs) when all containers of a given color contained a specific number of identical food items. All 3 animals also performed at high levels when comparing sets of containers with sets of visible food items. This indicates that the animals learned the approximate quantity of food items in containers of a given color. However, all animals failed in a summation task, in which a single container was compared with a set of 2 containers of a lesser individual quantity but a greater combined quantity. This difficulty was not overcome by sequential presentation of containers into opaque receptacles, but performance improved if the quantitative difference between sizes was very large.
	Address	Language Research Center, Georgia State University, Decatur, 30034, USA. mjberan@yahoo.com
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16045389			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2766
Permanent link to this record



	Author	Beran, M.J.; Pate, J.L.; Washburn, D.A.; Rumbaugh, D.M.
	Title	Sequential responding and planning in chimpanzees (Pan troglodytes) and rhesus macaques (Macaca mulatta)			Type	Journal Article
	Year	2004	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	30	Issue	3	Pages	203-212
	Keywords	Animals; Cognition; Female; Goals; Learning; Macaca mulatta/psychology; Male; Mathematics; Pan troglodytes/psychology; Task Performance and Analysis
	Abstract	Chimpanzees (Pan troglodytes) and rhesus macaques (Macaca mulatta) selected either Arabic numerals or colored squares on a computer monitor in a learned sequence. On shift trials, the locations of 2 stimuli were interchanged at some point. More errors were made when this interchange occurred for the next 2 stimuli to be selected than when the interchange was for stimuli later in the sequence. On mask trials, all remaining stimuli were occluded after the 1st selection. Performance exceeded chance levels for only 1 selection after these masks were applied. There was no difference in performance for either stimulus type (numerals or colors). The data indicated that the animals planned only the next selection during these computerized tasks as opposed to planning the entire response sequence.
	Address	Language Research Center, Georgia State University, Atlanta 30303, USA. mjberan@yahoo.com
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15279511			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2767
Permanent link to this record



	Author	Fagot, J.; Wasserman, E.A.; Young, M.E.
	Title	Discriminating the relation between relations: the role of entropy in abstract conceptualization by baboons (Papio papio) and humans (Homo sapiens)			Type	Journal Article
	Year	2001	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	27	Issue	4	Pages	316-328
	Keywords	Animals; Behavior, Animal; Choice Behavior; Cognition/physiology; Discrimination (Psychology); Discrimination Learning; Entropy; Female; Humans; Judgment/*physiology; Male; Papio
	Abstract	Two baboons (Papio papio) successfully learned relational matching-to-sample: They picked the choice display that involved the same relation among 16 pictures (same or different) as the sample display, although the sample display shared no pictures with the choice displays. The baboons generalized relational matching behavior to sample displays created from novel pictures. Further experiments varying the number of sample pictures and the mixture of same and different sample pictures suggested that entropy plays a key role in the baboons' conceptual behavior. Two humans (Homo sapiens) were similarly trained and tested; their behavior was both similar to and different from the baboons' behavior. The results suggest that animals other than humans and chimpanzees can discriminate the relation between relations. They further suggest that entropy detection may underlie same-different conceptualization, but that additional processes may participate in human conceptualization.
	Address	Comparative Cognition Research Group, Center for Research in Cognitive Neurosciences, 31 Chemin Joseph Aiguier, 13402 Marseille, France. fagot@lnf.cnrs-mrs.fr
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:11676083			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2772
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	Author	Boysen, S.T.; Bernston, G.G.; Hannan, M.B.; Cacioppo, J.T.
	Title	Quantity-based interference and symbolic representations in chimpanzees (Pan troglodytes)			Type	Journal Article
	Year	1996	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	22	Issue	1	Pages	76-86
	Keywords	Animals; Behavior, Animal; Cognition; Discrimination Learning; Female; Male; Pan troglodytes; *Reinforcement (Psychology); Task Performance and Analysis
	Abstract	Five chimpanzees with training in counting and numerical skills selected between 2 arrays of different amounts of candy or 2 Arabic numerals. A reversed reinforcement contingency was in effect, in which the selected array was removed and the subject received the nonselected candies (or the number of candies represented by the nonselected Arabic numeral). Animals were unable to maximize reward by selecting the smaller array when candies were used as array elements. When Arabic numerals were substituted for the candy arrays, all animals showed an immediate shift to a more optimal response strategy of selecting the smaller numeral, thereby receiving the larger reward. Results suggest that a response disposition to the high-incentive candy stimuli introduced a powerful interference effect on performance, which was effectively overridden by the use of symbolic representations.
	Address	Ohio State University, Department of Psychology, Ohio State University, Columbus 43210-1222, USA
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:8568498			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2781
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	Author	Boysen, S.T.; Berntson, G.G.
	Title	Responses to quantity: perceptual versus cognitive mechanisms in chimpanzees (Pan troglodytes)			Type	Journal Article
	Year	1995	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	21	Issue	1	Pages	82-86
	Keywords	Animals; Behavior, Animal; Choice Behavior; Cognition/physiology; Female; Pan troglodytes; Perception/*physiology; Reinforcement (Psychology); Task Performance and Analysis
	Abstract	Two chimpanzees were trained to select among 2 different amounts of candy (1-6 items). The task was designed so that selection of either array by the active (selector) chimpanzee resulted in that array being given to the passive (observer) animal, with the remaining (nonselected) array going to the selector. Neither animal was able to select consistently the smaller array, which would reap the larger reward. Rather, both animals preferentially selected the larger array, thereby receiving the smaller number of reinforcers. When Arabic numerals were substituted for the food arrays, however, the selector animal evidenced more optimal performance, immediately selecting the smaller numeral and thus receiving the larger reward. These findings suggest that a basic predisposition to respond to the perceptual-motivational features of incentive stimuli can interfere with task performance and that this interference can be overridden when abstract symbols serve as choice stimuli.
	Address	Comparative Cognition Project, Ohio State University, Columbus 43210-1222
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:7844508			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2783
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	Author	Cynx, J.; Hulse, S.H.; Polyzois, S.
	Title	A psychophysical measure of pitch discrimination loss resulting from a frequency range constraint in European starlings (Sturnus vulgaris)			Type	Journal Article
	Year	1986	Publication	Journal of Experimental Psychology. Animal Behavior Processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	12	Issue	4	Pages	394-402
	Keywords	Animals; Birds; Cognition; Female; Generalization, Stimulus; Male; *Pitch Discrimination; Psychoacoustics; Transfer (Psychology)
	Abstract	Earlier research (Hulse & Cynx, 1985) revealed that a number of species of songbirds acquired a pitch discrimination between rising and falling sequences in an arbitrarily defined training range of frequencies, but then failed to generalize the discrimination to new frequency ranges--a frequency range constraint. The two experiments here provide a psychophysical estimate of how pitch discrimination deteriorated in one species as sequences were stepped out from the training range. The gradient showing loss of discrimination was much sharper than would have been anticipated by stimulus generalization or the training procedures, and appeared unaffected by the removal of rising and falling frequency information. The frequency range constraint and its psychophysical properties have implications both for the analysis of birdsong and the study of animal cognition.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0097-7403	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:3772303			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2786
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	Author	Matsuzawa, T.
	Title	Use of numbers by a chimpanzee			Type	Journal Article
	Year	1985	Publication	Nature	Abbreviated Journal	Nature
	Volume	315	Issue	6014	Pages	57-59
	Keywords	Animals; Behavior, Animal/physiology; Cognition; Female; Mathematics; Pan troglodytes/*physiology
	Abstract	Recent studies have examined linguistic abilities in apes. However, although human mathematical abilities seem to be derived from the same foundation as those in language, we have little evidence for mathematical abilities in apes (but for exceptions see refs 7-10). In the present study, a 5-yr-old female chimpanzee (Pan troglodytes), 'Ai', was trained to use Arabic numerals to name the number of items in a display. Ai mastered numerical naming from one to six and was able to name the number, colour and object of 300 types of samples. Although no particular sequence of describing samples was required, the chimpanzee favoured two sequences (colour/object/number and object/colour/number). The present study demonstrates that the chimpanzee was able to describe the three attributes of the sample items and spontaneously organized the 'word order'.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0028-0836	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:3990808			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2793
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	Author	Milgram, N.W.; Head, E.; Muggenburg, B.; Holowachuk, D.; Murphey, H.; Estrada, J.; Ikeda-Douglas, C.J.; Zicker, S.C.; Cotman, C.W.
	Title	Landmark discrimination learning in the dog: effects of age, an antioxidant fortified food, and cognitive strategy			Type	Journal Article
	Year	2002	Publication	Neuroscience and Biobehavioral Reviews	Abbreviated Journal	Neurosci Biobehav Rev
	Volume	26	Issue	6	Pages	679-695
	Keywords	Age Factors; Aging/physiology; Analysis of Variance; Animals; Antioxidants/pharmacology; Blood Chemical Analysis/methods; Cognition/physiology; Diet; Discrimination Learning/drug effects/physiology; Distance Perception/drug effects/physiology; Dogs/physiology; Female; Male; Psychomotor Performance/physiology; Retention (Psychology)/drug effects/physiology; Spatial Behavior/drug effects/physiology; Task Performance and Analysis; Time Factors; Vitamin E/blood
	Abstract	The landmark discrimination learning test can be used to assess the ability to utilize allocentric spatial information to locate targets. The present experiments examined the role of various factors on performance of a landmark discrimination learning task in beagle dogs. Experiments 1 and 2 looked at the effects of age and food composition. Experiments 3 and 4 were aimed at characterizing the cognitive strategies used in performance on this task and in long-term retention. Cognitively equivalent groups of old and young dogs were placed into either a test group maintained on food enriched with a broad-spectrum of antioxidants and mitochondrial cofactors, or a control group maintained on a complete and balanced food formulated for adult dogs. Following a wash-in period, the dogs were tested on a series of problems, in which reward was obtained when the animal responded selectively to the object closest to a thin wooden block, which served as a landmark. In Experiment 1, dogs were first trained to respond to a landmark placed directly on top of coaster, landmark 0 (L0). In the next phase of testing, the landmark was moved at successively greater distances (1, 4 or 10 cm) away from the reward object. Learning varied as a function of age group, food group, and task. The young dogs learned all of the tasks more quickly than the old dogs. The aged dogs on the enriched food learned L0 significantly more rapidly than aged dogs on control food. A higher proportion of dogs on the enriched food learned the task, when the distance was increased to 1cm. Experiment 2 showed that accuracy decreased with increased distance between the reward object and landmark, and this effect was greater in old animals. Experiment 3 showed stability of performance, despite using a novel landmark, and new locations, indicating that dogs learned the landmark concept. Experiment 4 found age impaired long-term retention of the landmark task. These results indicate that allocentric spatial learning is impaired in an age-dependent manner in dogs, and that age also affects performance when the distance between the landmark and target is increased. In addition, these results both support a role of oxidative damage in the development of age-associated cognitive dysfunction and indicate that short-term administration of a food enriched with supplemental antioxidants and mitochondrial cofactors can partially reverse the deleterious effects of aging on cognition.
	Address	Life Science Division, University of Toronto at Scarborough, 1265 Military Trail, Scarborough, Ont., Canada M1C 1A4. milgram@psych.utoronto.ca
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0149-7634	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12479842			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2806
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	Author	Heschl, A.; Burkart, J.
	Title	A new mark test for mirror self-recognition in non-human primates			Type	Journal Article
	Year	2006	Publication	Primates	Abbreviated Journal	Primates
	Volume	47	Issue	3	Pages	187-198
	Keywords	Animals; Behavior, Animal; Callithrix/physiology; Cognition/physiology; Discrimination (Psychology)/physiology; Female; Male; Photic Stimulation; Self Concept
	Abstract	For 30 years Gallup's (Science 167:86-87, 1970) mark test, which consists of confronting a mirror-experienced test animal with its own previously altered mirror image, usually a color mark on forehead, eyebrow or ear, has delivered valuable results about the distribution of visual self-recognition in non-human primates. Chimpanzees, bonobos, orangutans and, less frequently, gorillas can learn to correctly understand the reflection of their body in a mirror. However, the standard version of the mark test is good only for positively proving the existence of self-recognition. Conclusive statements about the lack of self-recognition are more difficult because of the methodological constraints of the test. This situation has led to a persistent controversy about the power of Gallup's original technique. We devised a new variant of the test which permits more unequivocal decisions about both the presence and absence of self-recognition. This new procedure was tested with marmoset monkeys (Callithrix jacchus), following extensive training with mirror-related tasks to facilitate performance in the standard mark test. The results show that a slightly altered mark test with a new marking substance (chocolate cream) can help to reliably discriminate between true negative results, indicating a real lack of ability to recognize oneself in a mirror, from false negative results that are due to methodological particularities of the standard test. Finally, an evolutionary hypothesis is put forward as to why many primates can use a mirror instrumentally – i.e. know how to use it for grasping at hidden objects – while failing in the decisive mark test.
	Address	Konrad Lorenz Institute for Evolution and Cognition Research, Adolf Lorenz Gasse 2, 3422, Altenberg, Austria. adolf.heschl@uni-graz.at
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0032-8332	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16432640			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2810
Permanent link to this record



	Author	Poti, P.
	Title	Chimpanzees' constructional praxis (Pan paniscus, P. troglodytes)			Type	Journal Article
	Year	2005	Publication	Primates	Abbreviated Journal	Primates
	Volume	46	Issue	2	Pages	103-113
	Keywords	Animals; Cognition; Discrimination Learning; Female; Male; Pan troglodytes/physiology; Psychomotor Performance/physiology; Spatial Behavior/*physiology; Species Specificity
	Abstract	This study investigated chimpanzees' spontaneous spatial constructions with objects and especially their ability to repeat inter-object spatial relations, which is basic to understanding spatial relations at a higher level than perception or recognition. Subjects were six chimpanzees-four chimpanzees and two bonobos-aged 6-21 years, all raised in a human environment from an early age. Only minor species differences, but considerable individual differences were found. The effect of different object samples was assessed through a comparison with a previous study. A common overall chimpanzee pattern was also found. Chimpanzees repeated different types of inter-object spatial relations such as insertion (I), or vertical (V), or next-to (H) relations. However chimpanzees repeated I or V relations with more advanced procedures than when repeating H relations. Moreover, chimpanzees never repeated combined HV relations. Compared with children, chimpanzees showed a specific difficulty in repeating H relations. Repeating H relations is crucial for representing and understanding multiple reciprocal spatial relations between detached elements and for coordinating independent positions in space. Therefore, the chimpanzees' difficulty indicates a fundamental difference in constructive space in comparison to humans. The findings are discussed in relation to issues of spatial cognition and tool use.
	Address	Istituto di Scienze e Tecnologie della Cognizione, CNR, via U. Aldrovandi 16b, 00197, Rome, Italy. p.poti@istc.cnr.it
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0032-8332	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15378424			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	2811
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