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Author |
Phillips, K. |
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Title |
Natural conceptual behavior in squirrel monkeys (saimiri sciureus): An experimental investigation |
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Year |
1996 |
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Primates |
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Primates |
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37 |
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3 |
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327-332 |
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Abstract Natural conceptual discriminations have been tested in many different species, including pigeons and a variety of non-human primates. The ability of four male squirrel monkeys (Saimiri sciureus) to learn and use the natural concept “squirrel monkey” was investigated in this study. After a training phase, subjects were presented with novel stimuli in transfer and test trials. All subjects performed at a rate significantly above chance on the first test trial (p<.001), indicating that squirrel monkeys can utilize natural concepts in the laboratory. |
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Equine Behaviour @ team @ |
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3114 |
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Zachritz W.H.; Lundie L.L.; Wang H.; Thomas R.K. |
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Title |
Investigating cognitive abilities in animals: unrealized potential |
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1996 |
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Cognitive Brain Research |
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3 |
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157-166 |
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refbase @ user @ |
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3449 |
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Bizot J.-C.; Thiebot M.-H. |
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Title |
Impulsivity as a confounding factor in certain animal tests of cognitive function |
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1996 |
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Cognitive Brain Research |
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3 |
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243-250 |
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refbase @ user @ |
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3450 |
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Davidsson T.E.; Leonardson L.G.; Marston H.M. |
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Analysis of cognitive function in animals, the value of SDT |
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1996 |
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Cognitive Brain Research |
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3 |
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269-277 |
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refbase @ user @ |
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3451 |
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Author |
Overman W.H. |
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Title |
Adaptations of ''animal tests'' of cognition for use in children |
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1996 |
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Neurotoxicology and Teratology |
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18 |
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343-343 |
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refbase @ user @ |
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3472 |
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Sommer, H.; Barz, A.; Lindner, A. |
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Title |
Testing horses for character and temperament |
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1996 |
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Tierarztliche Umschau |
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Tierärztl. Umschau |
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Equine Behaviour @ team @ |
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3567 |
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Author |
Dixon, J.C. |
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Title |
Pattern discrimination, learning-set and memory in a pony |
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1996 |
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Proceedings of the Paper Presented at the Midwestern ..? |
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Equine Behaviour @ team @ |
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3599 |
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Author |
Poling, A.; Temple, W.; Foster, T.M. |
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The differential outcomes effect: A demonstration in domestic chickens responding under a titrating-delayed-matching-to-sample procedure |
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1996 |
Publication |
Behavioural Processes |
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Behav. Process. |
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36 |
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2 |
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109-115 |
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Domestic hen; Titrating-delayed-matching-to-sample procedure; Differential outcomes effect; Conditional discrimination; Animal welfare |
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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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Author |
Mal, M.E.; McCall ,C.A. |
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Title |
The influence of handling during different ages on a halter training test in foals |
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1996 |
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Applied Animal Behaviour Science |
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Appl. Anim. Behav. Sci. |
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5 |
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2 |
Pages |
115-120 |
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Ten foals were used to determine effects of handling during different ages on their ability to perform a halter training test. Early-handled (EH) foals (n = 5) were handled in 10 min sessions 5 d weekly from 24 h after birth until 42 d of age, then were not handled from 43 to 84 d of age. Later-handled (LH) foals (n = 5) were not handled from birth to 42 d of age, then were handled in 10-min sessions 5 d weekly from 43 to 84 d of age. At 85 d of age, each foal was subjected to a 10 min halter training test for 5 consecutive d. The test consisted of an unfamiliar handler placing a halter on each foal and attempting to make the foal walk forward for 20 m. Data recorded during each d of the halter training were duration of initial struggle, number of lunges into the air, time to first forward step, time to five consecutive forward steps, and time to travel 20 m. At the end of the 5 d halter training test, the handler assigned a subjective test rating score to each foal based on ease of training. Split-plot analysis indicated that EH foals took less time (P < 0.05) to take one step forward, five consecutive steps forward, and to travel 20 m than LH foals. One-way ANOVA indicated that EH foals had a lower (more desirable) test ratings than LH foals (P < 0.01). Results indicate that handling throughout the first 42 d of life increased foal performance on this halter training task compared to handling from 43 to 84 d of age. These results may imply the existence of a critical handling period during the first 42 d of age or a phenomenon similar to learned helplessness |
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Equine Behaviour @ team @ http://www.ag.auburn.edu/ansc/ResPrograms/influ_age.html |
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3665 |
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Ballew, R.M.; Sabelko, J.; Gruebele, M. |
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Title |
Direct observation of fast protein folding: the initial collapse of apomyoglobin |
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1996 |
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Proceedings of the National Academy of Sciences of the United States of America |
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Proc. Natl. Acad. Sci. U.S.A. |
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93 |
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12 |
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5759-5764 |
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Animals; Apoproteins/*chemistry; Circular Dichroism; Horses; Kinetics; Muscle, Skeletal/chemistry; Myoglobin/*chemistry; *Protein Folding; Spectrometry, Fluorescence; Spectrophotometry, Infrared; Temperature |
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The rapid refolding dynamics of apomyoglobin are followed by a new temperature-jump fluorescence technique on a 15-ns to 0.5-ms time scale in vitro. The apparatus measures the protein-folding history in a single sweep in standard aqueous buffers. The earliest steps during folding to a compact state are observed and are complete in under 20 micros. Experiments on mutants and consideration of steady-state CD and fluorescence spectra indicate that the observed microsecond phase monitors assembly of an A x (H x G) helix subunit. Measurements at different viscosities indicate diffusive behavior even at low viscosities, in agreement with motions of a solvent-exposed protein during the initial collapse. |
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School of Chemical Sciences and Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana, 61801, USA |
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English |
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0027-8424 |
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PMID:8650166 |
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Equine Behaviour @ team @ |
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3798 |
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