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| Author |
Poling, A.; Temple, W.; Foster, T.M. |
| Title |
The differential outcomes effect: A demonstration in domestic chickens responding under a titrating-delayed-matching-to-sample procedure |
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Journal Article |
| Year |
1996 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
36 |
Issue |
2 |
Pages  |
109-115 |
| Keywords |
Domestic hen; Titrating-delayed-matching-to-sample procedure; Differential outcomes effect; Conditional discrimination; Animal welfare |
| Abstract |
The differential outcomes effect refers to the increase in speed of acquisition or terminal accuracy that occurs in discrimination training when each of two or more discriminative stimuli is correlated with a different outcome (e.g. type of reinforcer). The present study demonstrated this effect in domestic hens exposed to a titrating-delayed-matching-to-sample procedure, under which correct responses increased (and incorrect responses decreased) the delay between the offset of a sample stimulus and the onset of two comparison stimuli. Colors of key illumination (red, green) were used as sample and comparison stimuli and correct responses resulted in 1- or 4-s food deliveries. When 1-s food deliveries consistently followed correct responses to one key color and 4-s food deliveries followed correct responses to the other key color, the maximum delay reached by the hens and their overall accuracy was significantly higher than when 1- and 4-s food deliveries were randomly arranged following correct responses to both key colors. These data constitute the first demonstration of the differential outcomes effect in chickens, and in any species evaluated under a titrating-delayed-matching-to-sample procedure. |
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Equine Behaviour @ team @ |
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3604 |
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Chalmeau, R.; Gallo, A. |
| Title |
Cooperation in primates: Critical analysis of behavioural criteria |
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Journal Article |
| Year |
1995 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
35 |
Issue |
1-3 |
Pages |
101-111 |
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Cognition; Communication; Cooperation; Evolution; Primates |
| Abstract |
Concerning hunting in chimpanzees, cooperation has generally been attributed to the behaviour of two or more individuals acting together to achieve a common goal (Boesch and Boesch, 1989). The common goal is often considered as the concrete result of a common action by two or several individuals. Although this result could be used as a criterion for cooperation, it could also be an outcome due to chance. We suggest that the goal, viewed as a concrete benefit shared by the partners, is not a requisite of cooperation but rather a possible consequence of a common action largely submitted to social constraints. Individuals engaged in a cooperative task in order to solve a problem have to exchange information to adjust to each other's behaviour. However, evidence of communication between partners during simultaneous cooperation is rare. An experiment in which two chimpanzees each had to simultaneously pull a handle to get a fruit was performed. We analysed not only the concrete result of the partners' activity but also what the individuals took into account before pulling a handle. We tried to specify what the chimpanzees learned by means of a series of logical propositions which we were able to confront the experimental results. |
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refbase @ user @ |
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570 |
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Anderson, J.R.; Fornasieri, I.; Ludes, E.; Roeder, J.-J. |
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Social processes and innovative behaviour in changing groups of lemur fulvus |
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Journal Article |
| Year |
1992 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
27 |
Issue |
2 |
Pages |
101-112 |
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Social learning; Lemur fulvus; Dominance; Individual differences |
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A group of brown lemurs was presented with one or two baited food-boxes requiring a specific type of motor response in order to be opened. Subsequently, four groups containing different combinations of experienced individuals from the original group and naive individuals were tested. Solutions to the problem and access to the food were recorded and considered in relation to social factors. In the original group, two adult males learned to open the boxes, with one male increasingly preventing the other from approaching. In the second group, with the subordinate male and certain females removed, the dominant male tolerated successful performances by a juvenile female. Group 3 consisted of three passive female participants from the original group and a naive female; one of the three original females now became the sole box-opener. The introduction of the subordinate male from the original group into the all-female group led to a sharing of box-opening by this subject and the skilled female. In the final group, intense aggression toward the skilled female by a new, naive adult male resulted in two previously passive females succeeding on some occasions. In lemurs, at least some `scroungers' appear able to learn to perform a new act when the social context permits. |
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refbase @ user @ |
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576 |
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Range, F.; Bugnyar, T.; Schlogl, C.; Kotrschal, K. |
| Title |
Individual and sex differences in learning abilities of ravens |
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Journal Article |
| Year |
2006 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
73 |
Issue |
1 |
Pages |
100-106 |
| Keywords |
Animals; Behavior, Animal/*physiology; *Crows; Discrimination Learning/*physiology; Exploratory Behavior/physiology; Female; *Individuality; Male; Sex Factors; Spatial Behavior |
| Abstract |
Behavioral and physiological characteristics of individuals within the same species have been found to be stable across time and contexts. In this study, we investigated individual differences in learning abilities and object and social manipulation to test for consistency within individuals across different tasks. Individual ravens (Corvus corax) were tested in simple color and position discrimination tasks to establish their learning abilities. We found that males were significantly better in the acquisition of the first discrimination task and the object manipulation task, but not in any of the other tasks. Furthermore, faster learners engaged less often in manipulations of conspecifics and exploration of objects to get access to food. No relationship between object and social manipulation and reversal training were found. Our results suggest that individual differences in regard to the acquisition of new tasks may be related to personalities or at least object manipulation in ravens. |
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Konrad Lorenz Research Station, A-4645 Gruenau 11, Austria. friederike.range@univie.ac.at |
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0376-6357 |
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PMID:16675158 |
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Equine Behaviour @ team @ |
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4146 |
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Kraak, S.B.M. |
| Title |
`Copying mate choice': Which phenomena deserve this term? |
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Journal Article |
| Year |
1996 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
36 |
Issue |
1 |
Pages |
99-102 |
| Keywords |
Copying mate choice; Proximate/ultimate causes |
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no |
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1816 |
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Allcroft, D. J.; Tolkamp, B. J.; Glasbey, C. A.; Kyriazakis, I. |
| Title |
The importance of `memory' in statistical models for animal feeding behaviour |
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Journal Article |
| Year |
2004 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
67 |
Issue |
1 |
Pages |
99-109 |
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Cow; Feeding data; Bouts; Memory; Satiety; Latent structure; Model comparison |
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We investigate models for animal feeding behaviour, with the aim of improving understanding of how animals organise their behaviour in the short term. We consider three classes of model: hidden Markov, latent Gaussian and semi-Markov. Each can predict the typical `clustered' feeding behaviour that is generally observed, however they differ in the extent to which `memory' of previous behaviour is allowed to affect future behaviour. The hidden Markov model has `lack of memory', the current behavioural state being dependent on the previous state only. The latent Gaussian model assumes feeding/non-feeding periods to occur by the thresholding of an underlying continuous variable, thereby incorporating some `short-term memory'. The semi-Markov model, by taking into account the duration of time spent in the previous state, can be said to incorporate `longer-term memory'. We fit each of these models to a dataset of cow feeding behaviour. We find the semi-Markov model (longer-term memory) to have the best fit to the data and the hidden Markov model (lack of memory) the worst. We argue that in view of effects of satiety on short-term feeding behaviour of animal species in general, biologically suitable models should allow `memory' to play a role. We conclude that our findings are equally relevant for the analysis of other types of short-term behaviour that are governed by satiety-like principles. |
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Equine Behaviour @ team @ |
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2350 |
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Le Pendu, Y.; Guilhem, C.; Briedermann, L.; Maublanc, M.-L.; Gerard, J.-F. |
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Interactions and associations between age and sex classes in mouflon sheep (Ovis gmelini) during winter |
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Journal Article |
| Year |
2000 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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52 |
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2-3 |
Pages |
97-107 |
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Group composition; Interactive behaviour; Sexual segregation; Social organisation; Ungulate; Wild sheep |
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Equine Behaviour @ team @ |
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4248 |
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Byrne, T.; Sutphin, G.; Poling, A. |
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Acquisition, extinction, and reacquisition of responding with delayed and immediate reinforcement |
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Journal Article |
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1998 |
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Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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43 |
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1 |
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97-101 |
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Acquisition; Delayed reinforcement; Extinction; Rats |
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The present study investigated acquisition, extinction, and reacquisition of free-operant responding when rats' lever presses produced water after a resetting delay of 0, 10, 20, or 30 s. Results indicated that: (1) responding was acquired rapidly at all delays without shaping or autoshaping; (2) resistance to extinction was directly related to delay length and inversely related to intermittency of reinforcement; (3) responding acquired with delayed reinforcement recovered less rapidly from extinction, and was less efficient, than responding acquired with immediate reinforcement. Comparing these results with those of studies using discrete-trials and free-operant procedures with no reinforcement delay suggest that the specific conditions under which behavior is maintained determines, in part, the behavioral effects of delay and intermittency of reinforcement. |
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Equine Behaviour @ team @ |
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3601 |
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Krueger, K.; Flauger, B.; Farmer, K.; Hemelrijk, C. |
| Title |
Movement initiation in groups of feral horses |
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Journal Article |
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2014 |
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Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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103 |
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91-101 |
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Horse; Equus ferus caballus; Distributed leadership; Herding; Departure; Rank |
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Abstract Herds of ungulates, flocks of birds, swarms of insects and schools of fish move in coordinated groups. Computer models show that only one or very few animals are needed to initiate and direct movement. To investigate initiation mechanisms further, we studied two ways in which movement can be initiated in feral horses: herding, and departure from the group. We examined traits affecting the likelihood of a horse initiating movement i.e. social rank, affiliative relationships, spatial position, and social network. We also investigated whether group members join a movement in dominance rank order. Our results show that whereas herding is exclusive to alpha males, any group member may initiate movement by departure. Social bonds, the number of animals interacted with, and the spatial position were not significantly associated with movement initiation. We did not find movement initiation by departure to be exclusive to any type of individual. Instead we find evidence for a limited form of distributed leadership, with higher ranking animals being followed more often. |
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0376-6357 |
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Equine Behaviour @ team @ |
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5738 |
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Zentall, T.R. |
| Title |
Timing, memory for intervals, and memory for untimed stimuli: The role of instructional ambiguity |
Type |
Journal Article |
| Year |
2006 |
Publication |
Behavioural processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
71 |
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2-3 |
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88-97 |
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Theories of animal timing have had to account for findings that the memory for the duration of a timed interval appears to be dramatically shorted within a short time of its termination. This finding has led to the subjective shortening hypothesis and it has been proposed to account for the poor memory that animals appear to have for the initial portion of a timed interval when a gap is inserted in the to-be-timed signal. It has also been proposed to account for the poor memory for a relatively long interval that has been discriminated from a shorter interval. I suggest here a simpler account in which ambiguity between the gap or retention interval and the intertrial interval results in resetting the clock, rather than forgetting the interval. The ambiguity hypothesis, together with a signal salience mechanism that determines how quickly the clock is reset at the start of the intertrial interval can account for the results of the reported timing experiments that have used the peak procedure. Furthermore, instructional ambiguity rather than memory loss may account for the results of many animal memory experiments that do not involve memory for time. |
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Department of Psychology, University of Kentucky, 202B Kastle Hall, Lexington, KY 40506-0044, USA. zentall@uky.edu |
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0376-6357 |
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PMID:16406373 |
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refbase @ user @ |
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219 |
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