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	Author	Zentall, T.R.; Galizio, M.; Critchfied, T.S.
	Title	Categorization, concept learning, and behavior analysis: an introduction			Type	Journal Article
	Year	2002	Publication	Journal of the experimental analysis of behavior	Abbreviated Journal	J Exp Anal Behav
	Volume	78	Issue	3	Pages	237-248
	Keywords	Animals; Association Learning; Concept Formation; Discrimination Learning; Humans; Language
	Abstract	Categorization and concept learning encompass some of the most important aspects of behavior, but historically they have not been central topics in the experimental analysis of behavior. To introduce this special issue of the Journal of the Experimental Analysis of Behavior (JEAB), we define key terms; distinguish between the study of concepts and the study of concept learning; describe three types of concept learning characterized by the stimulus classes they yield; and briefly identify several other themes (e.g., quantitative modeling and ties to language) that appear in the literature. As the special issue demonstrates, a surprising amount and diversity of work is being conducted that either represents a behavior-analytic perspective or can inform or constructively challenge this perspective.
	Address	Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu
	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	0022-5002	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12507002			Approved	no
	Call Number	refbase @ user @			Serial	236
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	Author	DiGian, K.A.; Friedrich, A.M.; Zentall, T.R.
	Title	Discriminative stimuli that follow a delay have added value for pigeons			Type	Journal Article
	Year	2004	Publication	Psychonomic bulletin & review	Abbreviated Journal	Psychon Bull Rev
	Volume	11	Issue	5	Pages	889-895
	Keywords	Animals; Behavior, Animal; Choice Behavior; Columbidae; Cues; Discrimination (Psychology)
	Abstract	Clement, Feltus, Kaiser, and Zentall (2000) reported that pigeons prefer discriminative stimuli that require greater effort (more pecks) to obtain over those that require less effort. In the present experiment, we examined two variables associated with this phenomenon. First, we asked whether delay of reinforcement, presumably a relatively aversive event similar to effort, would produce similar effects. Second, we asked whether the stimulus preference produced by a prior relatively aversive event depends on its anticipation. Anticipation of delay was accomplished by signaling its occurrence. Results indicated that delays can produce preferences similar to those produced by increased effort, but only if the delays are signaled.
	Address	University of Kentucky, Lexington, Kentucky 40506-0044, 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	1069-9384	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:15732699			Approved	no
	Call Number	refbase @ user @			Serial	226
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	Author	Nguyen, N.H.; Klein, E.D.; Zentall, T.R.
	Title	Imitation of a two-action sequence by pigeons			Type	Journal Article
	Year	2005	Publication	Psychonomic bulletin & review	Abbreviated Journal	Psychon Bull Rev
	Volume	12	Issue	3	Pages	514-518
	Keywords	Animals; Behavior, Animal; Cognition; Columbidae; Imitative Behavior; *Learning
	Abstract	Developmental psychologists have described imitation as a process that suggests perspective-taking abilities. However, imitative behavior has been found in animals, which are generally not considered capable of taking the perspective of another. Previous studies with birds have demonstrated the imitation of a single response (sometimes referred to as action-level imitation). In the present experiment, we examined the extent to which pigeons would imitate an unfamiliar sequence of two behaviors (sometimes referred to as program-level imitation). Our results indicate that, although there are individual differences, pigeons show a significant tendency to match a demonstrated sequence of behavior involving, first, a response to a treadle (pecking at it or stepping on it) and, second, pushing aside a screen that blocks access to food (a left-vs.-right push).
	Address	University of Kentucky, Lexington, Kentucky 40506, 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	1069-9384	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16235638			Approved	no
	Call Number	refbase @ user @			Serial	221
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	Author	Roper, K.L.; Zentall, T.R.
	Title	Directed forgetting in animals			Type	Journal Article
	Year	1993	Publication	Psychological bulletin	Abbreviated Journal	Psychol Bull
	Volume	113	Issue	3	Pages	513-532
	Keywords	Animals; Behavior, Animal; Cognition; Columbidae; Conditioning (Psychology); Discrimination Learning; Female; Humans; Male; Memory Disorders/psychology; Reinforcement (Psychology); Task Performance and Analysis
	Abstract	Directed-forgetting research with animals suggests that animals show disrupted test performance only under certain conditions. Important variables are (a) whether during training, the cue to forget (F cue) signals nonreward (i.e., that the trial is over) versus reward (i.e., that reinforcement can be obtained) and (b) given that reinforcement can be obtained on F-cue trials, whether the post-F-cue response pattern is compatible with the baseline memory task. It is proposed that some findings of directed forgetting can be attributed to trained response biases, whereas others may be attributable perhaps to frustration-produced interference. It is suggested that directed forgetting in animals should be studied using procedures similar to those used to study directed forgetting in humans. This can be accomplished by presenting, within a trial, both to-be-remembered and to-be-forgotten material.
	Address	Department of Psychology, University of Kentucky, Lexington 40506
	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	0033-2909	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:8316612			Approved	no
	Call Number	refbase @ user @			Serial	259
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	Author	Zentall, T.R.; Kaiser, D.H.; Clement, T.S.; Weaver, J.E.; Campbell, G.
	Title	Presence/absence-sample matching by pigeons: divergent retention functions may result from the similarity of behavior during the absence sample and the retention interval			Type	Journal Article
	Year	2000	Publication	Journal of experimental psychology. Animal behavior processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	26	Issue	3	Pages	294-304
	Keywords	Analysis of Variance; Animals; Behavior, Animal; Choice Behavior; Columbidae; Conditioning, Operant; Cues
	Abstract	Divergent choose-absence retention functions typically found in pigeons following presence/absence-sample matching have been attributed to the development of a single-code/default coding strategy. However, such effects may result from adventitious differential responding to the samples. In Experiment 1, retention functions were divergent only when differential sample responding could serve as the basis for comparison choice. In Experiment 2, when pecking did not occur during the retention interval, a choose-absence bias was found, but when pecking occurred during the retention interval, a choose-presence bias resulted. In Experiment 3, positive transfer was found when a stimulus associated with the absence of pecking replaced the absence sample but not when a stimulus associated with pecking replaced the presence sample. Thus, presence/absence-sample matching may not encourage the development of a single-code/default coding strategy in pigeons.
	Address	Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu
	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:10913994			Approved	no
	Call Number	refbase @ user @			Serial	247
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	Author	Zentall, T.R.; Clement, T.S.; Weaver, J.E.
	Title	Symmetry training in pigeons can produce functional equivalences			Type	Journal Article
	Year	2003	Publication	Psychonomic bulletin & review	Abbreviated Journal	Psychon Bull Rev
	Volume	10	Issue	2	Pages	387-391
	Keywords	Animals; Association; Behavior, Animal; Columbidae; Conditioning (Psychology)/physiology; Teaching/methods; *Transfer (Psychology)
	Abstract	Functional stimulus equivalence has been demonstrated using a transfer of training design with matching-to-sample training in which two sample stimuli are associated with the same comparison stimulus (A-B, C-B; many-to-one matching). Equivalence is shown by training a new association (A-D) and demonstrating the presence of an emergent relation (C-D). In the present experiment, we show that symmetry training, in which a bidirectional association is trained between two stimuli (A-B, B-A, using successive stimulus presentations followed by reinforcement), can also produce functional equivalence using a transfer of training design (i.e., train B-C, test A-C). The results suggest that training pigeons in the substitutability of two stimuli may be sufficient to produce functional stimulus equivalence between them. The results also have implications for the development of an emergent transitive relation, because training on A-B and B-C relations results in the emergence of an untrained A-C relation, if B-A training also is provided.
	Address	Department of Psychology, University of Kentucky, Lexington, Kentucky 40506-0044, USA. zentall@pop.uky.edu
	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	1069-9384	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:12921414			Approved	no
	Call Number	refbase @ user @			Serial	235
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	Author	Nallan, G.B.; Pace, G.M.; McCoy, D.F.; Zentall, T.R.
	Title	The role of elicited responding in the feature-positive effect			Type	Journal Article
	Year	1983	Publication	The American journal of psychology	Abbreviated Journal	Am J Psychol
	Volume	96	Issue	3	Pages	377-390
	Keywords	Animals; Color Perception; Columbidae; *Discrimination (Psychology); Male; Practice (Psychology); Reinforcement (Psychology); Time Factors
	Abstract	Hearst and Jenkins proposed in 1974 that elicited responding accounts for the feature-positive effect. To test this position, pigeons were exposed to a feature-positive or feature-negative discrimination between successively presented displays--one consisted of a red and a green response key and the other consisted of two green response keys. There were four main conditions: 5-5 (5-sec trials, 5-sec intertrial intervals), 5-30, 30-30, and 30-180. Conditions 5-30 and 30-180 should produce the largest amount of elicited responding, and therefore the largest feature-positive effects. A response-independent bird was yoked to each response-dependent bird to allow direct assessment of the amount of elicited responding generated by each condition. Contrary to the predictions by Hearst and Jenkins's theory, response-dependent birds showed large feature-positive effects in each condition. The largest feature-positive effect was obtained in condition 5-5. Response-independent birds produced similar results, but manifested low response rates.
	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	0002-9556	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:6650707			Approved	no
	Call Number	refbase @ user @			Serial	266
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	Author	Zentall, T.R.
	Title	Mental time travel in animals: a challenging question			Type	Journal Article
	Year	2006	Publication	Behavioural processes	Abbreviated Journal	Behav. Process.
	Volume	72	Issue	2	Pages	173-183
	Keywords	Animals; Behavior, Animal; Columbidae; Concept Formation; Conditioning, Operant; Imagination; Memory; Mental Recall; Planning Techniques; Rats; Time Perception; Transfer (Psychology)
	Abstract	Humans have the ability to mentally recreate past events (using episodic memory) and imagine future events (by planning). The best evidence for such mental time travel is personal and thus subjective. For this reason, it is particularly difficult to study such behavior in animals. There is some indirect evidence, however, that animals have both episodic memory and the ability to plan for the future. When unexpectedly asked to do so, animals can report about their recent past experiences (episodic memory) and they also appear to be able to use the anticipation of a future event as the basis for a present action (planning). Thus, the ability to imagine past and future events may not be uniquely human.
	Address	Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA. zentall@uky.edu
	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	0376-6357	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:16466863			Approved	no
	Call Number	refbase @ user @			Serial	218
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	Author	Zentall, T.R.
	Title	Imitation: definitions, evidence, and mechanisms			Type	Journal Article
	Year	2006	Publication	Animal cognition	Abbreviated Journal	Anim. Cogn.
	Volume	9	Issue	4	Pages	335-353
	Keywords	Adaptation, Psychological; Animals; Behavior, Animal; Imitative Behavior; Learning; Motivation; Social Environment; Transfer (Psychology)
	Abstract	Imitation can be defined as the copying of behavior. To a biologist, interest in imitation is focused on its adaptive value for the survival of the organism, but to a psychologist, the mechanisms responsible for imitation are the most interesting. For psychologists, the most important cases of imitation are those that involve demonstrated behavior that the imitator cannot see when it performs the behavior (e.g., scratching one's head). Such examples of imitation are sometimes referred to as opaque imitation because they are difficult to account for without positing cognitive mechanisms, such as perspective taking, that most animals have not been acknowledged to have. The present review first identifies various forms of social influence and social learning that do not qualify as opaque imitation, including species-typical mechanisms (e.g., mimicry and contagion), motivational mechanisms (e.g., social facilitation, incentive motivation, transfer of fear), attentional mechanisms (e.g., local enhancement, stimulus enhancement), imprinting, following, observational conditioning, and learning how the environment works (affordance learning). It then presents evidence for different forms of opaque imitation in animals, and identifies characteristics of human imitation that have been proposed to distinguish it from animal imitation. Finally, it examines the role played in opaque imitation by demonstrator reinforcement and observer motivation. Although accounts of imitation have been proposed that vary in their level of analysis from neural to cognitive, at present no theory of imitation appears to be adequate to account for the varied results that have been found.
	Address	Department of Psychology, University of Kentucky, Lexington, KY 40506-0044, USA. Zentall@uky.edu
	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	1435-9448	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:17024510			Approved	no
	Call Number	refbase @ user @			Serial	217
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	Author	Urcuioli, P.J.; DeMarse, T.B.; Zentall, T.R.
	Title	Transfer across delayed discriminations: II. Differences in the substitutability of initial versus test stimuli			Type	Journal Article
	Year	1998	Publication	Journal of experimental psychology. Animal behavior processes	Abbreviated Journal	J Exp Psychol Anim Behav Process
	Volume	24	Issue	1	Pages	47-59
	Keywords	Animals; Behavior, Animal; Columbidae/physiology; Discrimination Learning/physiology; Pattern Recognition, Visual/physiology; Reinforcement (Psychology); Retention (Psychology)/physiology
	Abstract	In 2 experiments, pigeons were trained on, and then transferred to, delayed simple discriminations in which the initial stimuli signalled reinforcement versus extinction following a retention interval. Experiment 1 showed that discriminative responding on the retention test transferred to novel test stimuli that had appeared in another delayed simple discrimination but not to stimuli having the same reinforcement history off-baseline. By contrast, Experiment 2 showed that performances transferred to novel initial stimuli whether they had been trained on-baseline or off-baseline. These results suggest that the test stimuli in delayed simple discriminations acquire control over responding only in the memory task itself. On the other hand, control by the initial stimuli, if coded as outcome expectancies, does not require such task-specific training.
	Address	Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907-1364, USA. uche@psych.purdue.edu
	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:9438965			Approved	no
	Call Number	refbase @ user @			Serial	253
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