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Author |
Wasserman, E.A.; Gagliardi, J.L.; Cook, B.R.; Kirkpatrick-Steger, K.; Astley, S.L.; Biederman, I. |
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Title |
The pigeon's recognition of drawings of depth-rotated stimuli |
Type |
Journal Article |
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Year |
1996 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
22 |
Issue |
2 |
Pages |
205-221 |
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Keywords |
Animals; Cognition/*physiology; Columbidae; Discrimination (Psychology); Form Perception/*physiology; Learning/*physiology; Photic Stimulation; Rotation |
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Abstract |
Four experiments used a four-choice discrimination learning paradigm to explore the pigeon's recognition of line drawings of four objects (an airplane, a chair, a desk lamp, and a flashlight) that were rotated in depth. The pigeons reliably generalized discriminative responding to pictorial stimuli over all untrained depth rotations, despite the bird's having been trained at only a single depth orientation. These generalization gradients closely resembled those found in prior research that used other stimulus dimensions. Increasing the number of different vantage points in the training set from one to three broadened the range of generalized testing performance, with wider spacing of the training orientations more effectively broadening generalized responding. Template and geon theories of visual recognition are applied to these empirical results. |
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Department of Psychology, University of Iowa, Iowa City 52242-1407, USA. ed-wasserman@uiowa.educ |
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0097-7403 |
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PMID:8618103 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2780 |
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Author |
Nallan, G.B.; Pace, G.M.; McCoy, D.F.; Zentall, T.R. |
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Title |
Temporal parameters of the feature positive effect |
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Journal Article |
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Year |
1979 |
Publication |
The American journal of psychology |
Abbreviated Journal |
Am J Psychol |
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Volume |
92 |
Issue |
4 |
Pages |
703-710 |
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Keywords |
Animals; Columbidae; Conditioning, Operant; *Discrimination Learning; Form Perception; Male; *Time Perception |
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Abstract |
Trial duration and intertrial interval duration were parametrically varied between groups of pigeons exposed to a discrimination involving the presence vs. the absence of a dot. Half the groups received the dot as the positive stimulus (feature positive groups) and half the groups received the dot as the negative stimulus (feature negative groups). Faster learning by the feature positive birds (feature positive effect) was found when the trial duration was short (5 sec) regardless of whether the intertrial interval was short (5 sec) or long (30 sec). No evidence for a feature positive effect was found when the trial duration was long (30 sec) regardless of the length of the intertrial interval (30 sec or 180 sec). The results suggest that short trial duration is a necessary condition for the occurrence of the feature positive effect, and neither intertrial interval nor trial duration/intertrial interval ratio are important for its occurrence. The suggestion that mechanisms underlying the feature positive effect and autoshaping might be similar was not supported by the present experiment since the trial duration/intertrial interval ration parameter appears to play an important role in autoshaping but not the feature positive effect. |
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0002-9556 |
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PMID:532834 |
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no |
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refbase @ user @ |
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269 |
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Zentall, T.R.; Jackson-Smith, P.; Jagielo, J.A.; Nallan, G.B. |
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Title |
Categorical shape and color coding by pigeons |
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Journal Article |
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Year |
1986 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
12 |
Issue |
2 |
Pages |
153-159 |
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Keywords |
Animals; *Color Perception; Columbidae; *Discrimination Learning; *Form Perception; *Generalization, Stimulus; Psychophysics; Transfer (Psychology) |
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Abstract |
Categorical coding is the tendency to respond similarly to discriminated stimuli. Past research indicates that pigeons can categorize colors according to at least three spectral regions. Two present experiments assessed the categorical coding of shapes and the existence of a higher order color category (all colors). Pigeons were trained on two independent tasks (matching-to-sample, and oddity-from-sample). One task involved red and a plus sign, the other a circle and green. On test trials one of the two comparison stimuli from one task was replaced by one of the stimuli from the other task. Differential performance based on which of the two stimuli from the other task was introduced suggested categorical coding rules. In Experiment 1 evidence for the categorical coding of sample shapes was found. Categorical color coding was also found; however, it was the comparison stimuli rather than the samples that were categorically coded. Experiment 2 replicated the categorical shape sample effect and ruled out the possibility that the particular colors used were responsible for the categorical coding of comparison stimuli. Overall, the results indicate that pigeons can develop categorical rules involving shapes and colors and that the color categories can be hierarchical. |
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0097-7403 |
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PMID:3701264 |
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no |
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Call Number |
refbase @ user @ |
Serial |
262 |
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Author |
Urcuioli, P.J.; Zentall, T.R. |
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Title |
Retrospective coding in pigeons' delayed matching-to-sample |
Type |
Journal Article |
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Year |
1986 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
12 |
Issue |
1 |
Pages |
69-77 |
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Keywords |
Animals; *Color Perception; Columbidae; *Discrimination Learning; *Form Perception; *Memory; *Mental Recall; Orientation; *Pattern Recognition, Visual; Retention (Psychology) |
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Abstract |
In this study we examined how coding processes in pigeons' delayed matching-to-sample were affected by the stimuli to be remembered. In Experiment 1, two groups of pigeons initially learned 0-delay matching-to-sample with identical comparison stimuli (vertical and horizontal lines) but with different sample stimuli (red and green hues or vertical and horizontal lines). Longer delays were then introduced between sample offset and comparison onset to assess whether pigeons were prospectively coding the same events (viz., the correct line comparisons) or retrospectively coding different events (viz., their respective sample stimuli). The hue-sample group matched more accurately and showed a slower rate of forgetting than the line-sample group. In Experiment 2, pigeons were trained with either hues or lines as both sample and comparison stimuli, or with hue samples and line comparisons or vice versa. Subsequent delay tests revealed that the hue-sample groups remembered more accurately and generally showed slower rates of forgetting than the line-sample groups. Comparison dimension had little or no effect on performance. Together, these data suggest that pigeons retrospectively code the samples in delayed matching-to-sample. |
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0097-7403 |
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PMID:3701260 |
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no |
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Call Number |
refbase @ user @ |
Serial |
263 |
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Author |
Pepperberg, I.M.; Brezinsky, M.V. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Acquisition of a relative class concept by an African gray parrot (Psittacus erithacus): discriminations based on relative size |
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Journal Article |
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Year |
1991 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J Comp Psychol |
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Volume |
105 |
Issue |
3 |
Pages |
286-294 |
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Keywords |
Animals; Aptitude; *Concept Formation; *Discrimination Learning; Form Perception; Male; Mental Recall; *Parrots; *Size Perception; Vocalization, Animal |
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We report that an African gray parrot (Psittacus erithacus), Alex, responds to stimuli on a relative basis. Previous laboratory studies with artificial stimuli (such as pure tones) suggest that birds make relational responses as a secondary strategy, only after they have acquired information about the absolute values of the stimuli. Alex, however, after learning to respond to a small set of exemplars on the basis of relative size, transferred this behavior to novel situations that did not provide specific information about the absolute values of the stimuli. He responded to vocal questions about which was the larger or smaller exemplar by vocally labeling its color or material, and he responded “none” if the exemplars did not differ in size. His overall accuracy was 78.7%. |
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Northwestern University |
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Washington, D.C. : 1983 |
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0735-7036 |
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PMID:1935007 |
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yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
3610 |
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Author |
Henderson, J.; Hurly, T.A.; Healy, S.D. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Spatial relational learning in rufous hummingbirds (Selasphorus rufus) |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
3 |
Pages |
201-205 |
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Keywords |
Animals; *Association Learning; *Birds; *Concept Formation; Flowers; Form Perception; Male; *Orientation; Reward; Size Perception; *Space Perception; Spatial Behavior |
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Abstract |
There is increasing evidence that animals can learn abstract spatial relationships, and successfully transfer this knowledge to novel situations. In this study, rufous hummingbirds (Selasphorus rufus) were trained to feed from either the lower or the higher of two flowers. When presented with a test pair of flowers, one of which was at a novel height, they chose the flower in the appropriate spatial position rather than the flower at the correct height. This response may also have been influenced by a preference for taller flowers as acquisition of the task during experimental training occurred more readily when the reward flower was the taller of the pair. Thus, it appears that although learning abstract relationships may be a general phenomenon across contexts, and perhaps across species, the ease with which they are learned and the context in which they are subsequently used may not be the same. |
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Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3JT, UK |
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1435-9448 |
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PMID:16767469 |
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no |
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Equine Behaviour @ team @ |
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2465 |
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Author |
Aust, U.; Huber, L. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Picture-object recognition in pigeons: evidence of representational insight in a visual categorization task using a complementary information procedure |
Type |
Journal Article |
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Year |
2006 |
Publication |
Journal of Experimental Psychology. Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
32 |
Issue |
2 |
Pages |
190-195 |
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Keywords |
Animals; Classification; *Cognition; Columbidae; *Discrimination Learning; *Form Perception; *Generalization (Psychology); Humans; Perceptual Closure; Photic Stimulation; Photography; *Recognition (Psychology) |
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Success in tasks requiring categorization of pictorial stimuli does not prove that a subject understands what the pictures stand for. The ability to achieve representational insight is by no means a trivial one because it exceeds mere detection of 2-D features present in both the pictorial images and their referents. So far, evidence for such an ability in nonhuman species is weak and inconclusive. Here, the authors report evidence of representational insight in pigeons. After being trained on pictures of incomplete human figures, the birds responded significantly more to pictures of the previously missing parts than to nonrepresentative stimuli, which demonstrates that they actually recognized the pictures' representational content. |
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Department for Behavior, Neurobiology and Cognition, University of Vienna, Austria. ulrike.aust@univie.ac.at |
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0097-7403 |
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Notes ![sorted by Notes field, descending order (down)](img/sort_desc.gif) |
PMID:16634663 |
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no |
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Call Number |
Equine Behaviour @ team @ |
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2759 |
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Author |
Skov-Rackette, S.I.; Shettleworth, S.J. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
What do rats learn about the geometry of object arrays? Tests with exploratory behavior |
Type |
Journal Article |
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Year |
2005 |
Publication |
Journal of experimental psychology. Animal behavior processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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Volume |
31 |
Issue |
2 |
Pages |
142-154 |
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Animals; Behavior, Animal; *Discrimination Learning; *Exploratory Behavior; Female; *Form Perception; Habituation, Psychophysiologic; Male; Rats; Rats, Long-Evans |
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Six experiments using habituation of exploratory behavior tested whether disoriented rats foraging in a large arena encode the shapes of arrays of objects. Rats did not respond to changes in position of a single object, but they responded to a change in object color and to a change in position of 1 object in a square array, as in previous research (e.g., C. Thinus-Blanc et al., 1987). Rats also responded to an expansion of a square array, suggesting that they encoded sets of interobject distances rather than overall shape. In Experiments 4-6, rats did not respond to changes in sense of a triangular array that maintained interobject distances and angles. Shapes of object arrays are encoded differently from shapes of enclosures. |
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Department of Psychology, University of Toronto, Toronto, ON M5S 3G3, Canada. shannon.skov.rackette@utoronto.ca |
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0097-7403 |
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PMID:15839772 |
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no |
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Call Number |
refbase @ user @ |
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363 |
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Author |
Fiset, S.; Landry, F.; Ouellette, M. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Egocentric search for disappearing objects in domestic dogs: evidence for a geometric hypothesis of direction |
Type |
Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
Issue |
1 |
Pages |
1-12 |
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Animals; Dogs/*psychology; Female; Form Perception; Male; Mental Recall; *Motion Perception; Orientation; Problem Solving; *Space Perception |
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In several species, the ability to locate a disappearing object is an adaptive component of predatory and social behaviour. In domestic dogs, spatial memory for hidden objects is primarily based on an egocentric frame of reference. We investigated the geometric components of egocentric spatial information used by domestic dogs to locate an object they saw move and disappear. In experiment 1, the distance and the direction between the position of the animal and the hiding location were put in conflict. Results showed that the dogs primarily used the directional information between their own spatial coordinates and the target position. In experiment 2, the accuracy of the dogs in finding a hidden object by using directional information was estimated by manipulating the angular deviation between adjacent hiding locations and the position of the animal. Four angular deviations were tested: 5, 7.5, 10 and 15 degrees . Results showed that the performance of the dogs decreased as a function of the angular deviations but it clearly remained well above chance, revealing that the representation of the dogs for direction is precise. In the discussion, we examine how and why domestic dogs determine the direction in which they saw an object disappear. |
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Secteur Sciences Humaines, Universite de Moncton, Campus d'Edmundston, Edmundston, New-Brunswick, Canada E3V 2S8. sfiset@umce.ca |
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1435-9448 |
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PMID:15750805 |
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no |
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Equine Behaviour @ team @ |
Serial |
2489 |
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Author |
Bovet, D.; Vauclair, J.; Blaye, A. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Categorization and abstraction abilities in 3-year-old children: a comparison with monkey data |
Type |
Journal Article |
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Year |
2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
8 |
Issue |
1 |
Pages |
53-59 |
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Animals; Child Development; Child, Preschool; *Classification; *Concept Formation; *Discrimination Learning; Female; *Form Perception; Humans; Male; Papio; Pattern Recognition, Visual; *Problem Solving; Species Specificity |
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Three-year-old children were tested on three categorization tasks of increasing levels of abstraction (used with adult baboons in an earlier study): the first was a conceptual categorization task (food vs toys), the second a perceptual matching task (same vs different objects), and the third a relational matching task in which the children had to sort pairs according to whether or not the two items belonged to the same or different categories. The children were tested using two different procedures, the first a replication of the procedure used with the baboons (pulling one rope for a category or a relationship between two objects, and another rope for the other category or relationship), the second a task based upon children's prior experiences with sorting objects (putting in the same box objects belonging to the same category or a pair of objects exemplifying the same relation). The children were able to solve the first task (conceptual categorization) when tested with the sorting into boxes procedure, and the second task (perceptual matching) when tested with both procedures. The children were able to master the third task (relational matching) only when the rules were clearly explained to them, but not when they could only watch sorting examples. In fact, the relational matching task without explanation requires analogy abilities that do not seem to be fully developed at 3 years of age. The discrepancies in performances between children tested with the two procedures, with the task explained or not, and the discrepancies observed between children and baboons are discussed in relation to differences between species and/or problem-solving strategies. |
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Address |
Center for Research in Psychology of Cognition, Language and Emotion, Universite de Provence, Aix-en-Provence, France. dbovet@u-paris10.fr |
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Notes ![sorted by Notes field, descending order (down)](img/sort_desc.gif) |
PMID:15300466 |
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no |
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Equine Behaviour @ team @ |
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2516 |
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