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of 15
pro vyhledávání: '"Jennifer Vonk"'
Publikováno v:
Zoo Biology. 40:89-97
Judgment bias tasks can reveal changes in affect in animals as a function of environmental manipulations such as provision of enrichment. We assessed affect in an American black bear across seasonal changes in availability of a mulberry bush. We used
Autor:
Molly C. McGuire, Jennifer Vonk
Publikováno v:
PeerJ, Vol 8, p e9525 (2020)
Background Individuals experiencing negative affect have shown response slowing, a longer latency to respond in relation to baseline, when presented with aversive stimuli. We assessed response slowing in three male gorillas housed in a bachelor group
Publikováno v:
Behavioral Sciences, Vol 10, Iss 81, p 81 (2020)
Behavioral Sciences
Volume 10
Issue 5
Behavioral Sciences
Volume 10
Issue 5
Over the last two decades, evidence has accrued that at least some nonhuman animals possess metacognitive abilities. However, of the carnivores, only domestic dogs have been tested. Although rarely represented in the psychological literature, foxes a
Autor:
Zoe Johnson-Ulrich, Jennifer Vonk
Publikováno v:
Animal Cognition. 21:531-550
The spatial-numerical association of response codes (SNARC) effect is the tendency for humans to respond faster to relatively larger numbers on the left or right (or with the left or right hand) and faster to relatively smaller numbers on the other s
Autor:
Molly C. McGuire, Jennifer Vonk
Publikováno v:
Animal Behavior and Cognition, Vol 5, Iss 1, Pp 103-117 (2018)
In order to assess mood state in three male western lowland gorillas housed in a bachelor group, we developed a novel version of a cognitive bias task. The background color of a touchscreen presented a conditional ‘if, then…” rule relating to o
Publikováno v:
Zoo Biology. 37:23-34
We investigated how forage material affects indicators of welfare in three male Western lowland gorillas (Gorilla gorilla gorilla) at the Detroit Zoo. In addition to their maintenance diet and enrichment foods, the gorillas generally received forage
Autor:
Jennifer Vonk
Publikováno v:
Animal Sentience. 4
Publikováno v:
Behavioral Sciences; Volume 7; Issue 3; Pages: 51
Behavioral Sciences
Behavioral Sciences, Vol 7, Iss 3, p 51 (2017)
Behavioral Sciences
Behavioral Sciences, Vol 7, Iss 3, p 51 (2017)
Cognitive bias tests are frequently used to assess affective state in nonhumans. We adapted the ambiguous-cue paradigm to assess affective states and to compare learning of reward associations in two distantly related species, an American black bear
Autor:
Jennifer Vonk, Melissa Thueme, Michael J. Beran, Jennifer Thomas, Lauri Torgerson-White, Molly C. McGuire
Publikováno v:
Animal Cognition. 17:755-765
We investigated the quantity judgment abilities of two adult male western lowland gorillas (Gorilla gorilla gorilla) by presenting discrimination tasks on a touch-screen computer. Both gorillas chose the larger quantity of two arrays of dot stimuli.
Autor:
Jennifer Vonk, Ela Wojtkowski, Mary Humbyrd, Zoe Johnson-Ulrich, Marilyn Crowley, Stephanie Allard, Florence Yates
Publikováno v:
Animal cognition. 19(6)
Many animals have been tested for conceptual discriminations using two-dimensional images as stimuli, and many of these species appear to transfer knowledge from 2D images to analogous real life objects. We tested an American black bear for picture-o