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| Author | Hanggi, E.B. | ||||
| Title | Categorization Learning in Horses (Equus caballus) | Type | Journal Article | ||
| Year | 1999 | Publication  |
Journal of Comparative Psychology | Abbreviated Journal | J. Comp. Psychol. |
| Volume | 113 | Issue | 3 | Pages | 243-252 |
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| Abstract | Categorization learning was investigated in 2 horses (Equus caballus). Both horses learned to select a 2-dimensional black stimulus with an open center instead of a filled stimulus in a 2-choice discrimination task. After a criterion of 10 out of 10 correct responses in a random series for 2 consecutive sessions was reached, 15 additional pairs of open-center versus filled stimuli were tested. Each was run to criterion and then incorporated into sessions of randomly mixed problems. Both horses solved the 1st problem by simple pattern discrimination and showed evidence of categorical processing for subsequent problems. New pairs were learned with few or no errors, and correct responses on novel trials were significantly above chance. These results suggest that the horses were making their selections on the basis of shared characteristics with the training stimuli and were using categorization skills in problem solving. | ||||
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| Notes | Approved | yes | |||
| Call Number | Equine Behaviour @ team @ | Serial | 3678 | ||
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| Author | Custance, D.; Whiten, A.; Fredman, T. | ||||
| Title | Social learning of an artificial fruit task in capuchin monkeys (Cebus apella). | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of Comparative Psychology | Abbreviated Journal | J. Comp. Psychol. |
| Volume | 113 | Issue | 1 | Pages | 13-23 |
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| Abstract | Social learning in 11 human-raised capuchin monkeys (Cebus apella) was investigated using an artificial fruit that was designed as an analogue of natural foraging problems faced by primates. Each subject observed a human model open each of 3 principal components on the fruit in 1 of 2 alternative ways (“morphs”). The capuchin monkeys reproduced, to differing extents, the alternative techniques used for opening 1 component of the task (poking vs. pulling while twisting out a pair of smooth plastic bolts) but not the other 2. From the subjects' actions on the bolt latch, independent coders could recognize which morph they had witnessed, and they observed a degree of matching to the demonstrator's act consistent with simple imitation or object movement reenactment (A learns from watching B how an object, or parts of an object, move). Thus, these capuchins were capable of more complex social learning than has been recently ascribed to monkeys. (PsycINFO Database Record (c) 2016 APA, all rights reserved) | ||||
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 6563 | ||
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| Author | Lilienfeld, S.O.; Gershon, J.; Duke, M.; Marino, L.; de Waal, F.B. | ||||
| Title | A preliminary investigation of the construct of psychopathic personality (psychopathy) in chimpanzees (Pan troglodytes) | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of comparative psychology (Washington, D.C. : 1983) | Abbreviated Journal | J Comp Psychol |
| Volume | 113 | Issue | 4 | Pages | 365-375 |
| Keywords | Age Factors; Analysis of Variance; Animals; Antisocial Personality Disorder/*diagnosis/psychology; Ethology/*methods; Female; Male; Observer Variation; Pan troglodytes/*psychology; Psychiatric Status Rating Scales/*standards; Reproducibility of Results; Sex Characteristics; *Social Behavior | ||||
| Abstract | Although the construct of psychopathy has received considerable attention in humans, its relevance to other animals is largely unknown. We developed a measure of psychopathy for use in chimpanzees (Pan troglodytes), the Chimpanzee Psychopathy Measure (CPM), and asked 6 raters to complete this index on 34 chimpanzees. The CPM (a) demonstrated satisfactory interrater reliability and internal consistency; (b) exhibited marginally significant sex differences (males > females); (c) correlated positively with measures of extraversion, agreeableness, and observational ratings of agonism, sexual activity, daring behaviors, teasing, silent bluff displays, and temper tantrums, and negatively with observational ratings of generosity; and (d) demonstrated incremental validity above and beyond a measure of dominance. Although further validation of the CPM is needed, these findings suggest that the psychopathy construct may be relevant to chimpanzees. | ||||
| Address | Department of Psychology, Emory University, Atlanta, Georgia 30322, USA. scott@ss.emory.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0735-7036 | ISBN | Medium | ||
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| Notes | PMID:10608560 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 193 | ||
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| Author | Aureli, F.; Preston, S.D.; de Waal, F.B. | ||||
| Title | Heart rate responses to social interactions in free-moving rhesus macaques (Macaca mulatta): a pilot study | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of comparative psychology (Washington, D.C. : 1983) | Abbreviated Journal | J Comp Psychol |
| Volume | 113 | Issue | 1 | Pages | 59-65 |
| Keywords | Animals; Behavior, Animal/physiology; Female; Grooming/physiology; Heart Rate/*physiology; Macaca mulatta/*physiology; Male; Movement/*physiology; Pilot Projects; *Social Behavior | ||||
| Abstract | Heart rate telemetry was explored as a means to access animal emotion during social interactions under naturalistic conditions. Heart rates of 2 middle-ranking adult females living in a large group of rhesus macaques (Macaca mulatta) were recorded along with their behavior. Heart rate changes during 2 types of interactions were investigated, while controlling for the effects of posture and activity. The risk of aggression associated with the approach of a dominant individual was expected to provoke anxiety in the approachee. This prediction was supported by the heart rate increase after such an approach. No increase was found when the approacher was a kin or a subordinate individual. The tension-reduction function of allogrooming was also supported. Heart rate decelerated faster during the receipt of grooming than in matched control periods. | ||||
| Address | Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA. aureli@rmy.emory.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0735-7036 | ISBN | Medium | ||
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| Notes | PMID:10098269 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 197 | ||
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| Author | Hanggi, E.B. | ||||
| Title | Interocular transfer of learning In horses (Equus caballus) | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of Equine Veterinary Science | Abbreviated Journal | J Equine Vet Sci |
| Volume | 19 | Issue | 8 | Pages | 518-524 |
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| Notes | Approved | no | |||
| Call Number | Equine Behaviour @ team @ | Serial | 3564 | ||
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| Author | Crystal, J.D. | ||||
| Title | Systematic nonlinearities in the perception of temporal intervals | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of Experimental Psychology. Animal Behavior Processes | Abbreviated Journal | J Exp Psychol Anim Behav Process |
| Volume | 25 | Issue | 1 | Pages | 3-17 |
| Keywords | Animals; *Attention; Awareness; Discrimination Learning; Male; Neural Networks (Computer); *Nonlinear Dynamics; Rats; Rats, Sprague-Dawley; Sensory Thresholds; *Time Perception | ||||
| Abstract | Rats judged time intervals in a choice procedure in which accuracy was maintained at approximately 75% correct. Sensitivity to time (d') was approximately constant for short durations 2.0-32.0 s with 1.0- or 2.0-s spacing between intervals (n = 5 in each group, Experiment 1), 2.0-50.0 s with 2.0-s spacing (n = 2, Experiment 1), and 0.1-2.0 s with 0.1- or 0.2-s spacing (n = 6 in each group, Experiment 2). However, systematic departures from average sensitivity were observed, with local maxima in sensitivity at approximately 0.3, 1.2, 10.0, 24.0, and 36.0 s. Such systematic departures from an approximately constant d' are predicted by a connectionist theory of time with multiple oscillators and may require a modification of the linear timing hypothesis of scalar timing theory. | ||||
| Address | Department of Psychology, Brown University, USA. jdcrys@facstaff.wm.edu | ||||
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| Language | English | Summary Language | Original Title | ||
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| ISSN | 0097-7403 | ISBN | Medium | ||
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| Notes | PMID:9987854 | Approved | no | ||
| Call Number | Equine Behaviour @ team @ | Serial | 2776 | ||
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| Author | Cioni, P.; Strambini, G.B. | ||||
| Title | Pressure/temperature effects on protein flexibilty from acrylamide quenching of protein phosphorescence | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of Molecular Biology | Abbreviated Journal | |
| Volume | 291 | Issue | 4 | Pages | 955-964 |
| Keywords | phosphorescence; tryptophan; acrylamide; quenching; protein dynamics | ||||
| Abstract | Pressure is an effective modulator of protein structure and biological function. The influence of hydrostatic pressure ([less-than-or-equals, slant]3 kbar, 10-50[degree sign]C) on conformational dynamics was assessed from the rate of migration of acrylamide through the protein interior. Migration rates in apoazurin, alcohol dehydrogenase and alkaline phosphatase were obtained from the phosphorescence quenching rate constant (kq) of the deeply buried Trp residues. The dominant effect of applied pressure is to slow the diffusion process, although at low temperature, high pressure may also accelerate it. For apoazurin, alcohol dehydrogenase and alkaline phosphatase the activation free volumes, ΔVobs++, derived from the pressure-dependence of kq, ranges from +10, +16 and +20 ml mol-1 at 50[degree sign]C to -20, +5 and 0 ml mol-1 at 10[degree sign]C, respectively. Analysing ΔVobs++ in terms of a positive contribution from cavity expansion and a negative one from peptide hydration, the results emphasise that whereas at warm temperature the formation of cavities plays a dominant role in the migration process, at low temperature the required flexibility may be conferred by internal protein hydration. The relatively small magnitude of both ΔVobs++ and the activation enthalpy (ΔH++=10-20 kcal mol-1) indicates that acrylamide diffusion jumps inside these proteins appear to involve relatively small amplitude structural fluctuations not requiring major unfolding-like transitions. The implication of these findings for the thermodynamic stability of proteins under pressure is discussed. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 3975 | ||
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| Author | Zentall, T.R. | ||||
| Title | Support for a theory of memory for event duration must distinguish between test-trial ambiguity and actual memory loss | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of the experimental analysis of behavior | Abbreviated Journal | J Exp Anal Behav |
| Volume | 72 | Issue | 3 | Pages | 467-472 |
| Keywords | Animals; Behavior, Animal/physiology; Columbidae; Conditioning, Operant/physiology; Discrimination Learning/physiology; Memory/*physiology; *Psychological Theory; Time Factors; Time Perception/physiology | ||||
| Abstract | Staddon and Higa's (1999) trace-strength theory of timing and memory for event duration can account for pigeons' bias to “choose short” when retention intervals are introduced and to “choose long” when, following training with a fixed retention interval, retention intervals are shortened. However, it does not account for the failure of pigeons to choose short when the intertrial interval is distinct from the retention interval. That finding suggests that stimulus generalization (or ambiguity) between the intertrial interval and the retention interval may result in an effect that has been attributed to memory loss. Such artifacts must be eliminated before a theory of memory for event duration can be adequately tested. | ||||
| Address | Department of Psychology, University of Kentucky, Lexington 40506, USA. zentall@pop.uky.edu | ||||
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| ISSN | 0022-5002 | ISBN | Medium | ||
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| Notes | PMID:10605105 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 251 | ||
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| Author | Farmer-Dougan, V.; Dougan, J. | ||||
| Title | The Man Who Listens To Behavior: Folk Wisdom And Behavior Analysis From A Real Horse Whisperer | Type | Journal Article | ||
| Year | 1999 | Publication |
JOURNAL OF THE EXPERIMENTAL ANALYSIS OF BEHAVIOR | Abbreviated Journal | J Exp Anal Behav |
| Volume | 72 | Issue | 1 | Pages | 139-149 |
| Keywords | positive reinforcement, aversive control, learned helplessness, language, biological constraints, | ||||
| Abstract | The popular novel and movie The Horse Whisperer are based on the work of several real-life horse whisperers, the most famous of whom is Monty Roberts. Over the last 50 years, Roberts has developed a technique for training horses that is both more effective and less aversive than traditional training techniques. An analysis of Roberts` methods (as described in his book, The Man Who Listens to Horses) indicates a deep understanding of behavioral principles including positive reinforcement, timeout, species-specific defense reactions, learned helplessness, and the behavioral analysis of language. Roberts developed his theory and techniques on the basis of personal experience and folk wisdom, and not as the result of formal training in behavior analysis. Behavior analysts can clearly learn from such insightful yet behaviorally incorrect practitioners, just as such practitioners can benefit from the objective science of behavior analysts. |
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| ISSN | 0022-5002 | ISBN | Medium | ||
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| Notes | PMID:16812908 | Approved | no | ||
| Call Number | refbase @ user @ | Serial | 1829 | ||
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| Author | Fishman, M.A. | ||||
| Title | Predator Inspection: Closer Approach as a Way to Improve Assessment of Potential Threats | Type | Journal Article | ||
| Year | 1999 | Publication |
Journal of Theoretical Biology | Abbreviated Journal | J. Theor. Biol. |
| Volume | 196 | Issue | 2 | Pages | 225-235 |
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| Abstract | When detecting a predator, some prey animals respond in a counterintuitive fashion by approaching, rather than fleeing, that potential threat of extinction. This seemingly paradoxical behaviour, known aspredator inspection, has been reported for a wide variety of taxa--and therefore can be assumed to be adaptive. However, the view of predator inspection as a paradoxical behaviour rests on two implicit assumptions: (a) initial predator detecting is unambiguous, with no uncertainty in discriminating between hunting and non hunting members of predator species, or members of predator species and unrelated phenomena; (b) the costs of flight are negligible relative to the risk of predation. Upon reflection assumption (a) is not really tenable. Whereas assumption (b) is not consistent with experimental evidence [Godin & Crossman (1994)Behav. Ecol. Sociobiol.34,359-366]. Given that predator detection is ambiguous and the costs of flight are not negligible, a prey individual may benefit by a closer approach to the source of the alarming signals, thus improving its assessment of the situation--despite the increased risk of predation. In this paper, the above statement is given rigor by reformulating the problem in game theoretical terms. The results indicate that a prey will minimize its costs by performing predator inspection whenever its degree of certainty regarding predator identification and/or assessment of its intentions is less than a threshold, which is determined by the model's parameters. | ||||
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| Notes | Approved | no | |||
| Call Number | refbase @ user @ | Serial | 523 | ||
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