Zobrazeno 1 - 10
of 18
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
Publikováno v:
Primates. 61:237-247
Studies of prosocial behavior in nonhumans have focused on group-living social animals. Despite being highly social and closely related to humans, chimpanzees have rarely exhibited prosocial preferences in experimental tasks. Fewer studies have provi
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
Publikováno v:
Journal of Comparative Psychology. 131:384-389
The visual acuity of striped skunks (Mephitis mephitis) was tested using a 2 alternative forced-choice task with square wave gratings. Skunks were reinforced with food items for touching a ball in front of a striped stimulus when paired with a ball i
Publikováno v:
The Journal of genetic psychology. 180(2-3)
Little research has examined the mechanisms through which adult children adopt beliefs across a range of contexts. Through an online survey, the authors examined belief transmission via the correspondence between beliefs of 837 young adults and the p
Autor:
Jennifer Vonk, Jennifer Hamilton
Publikováno v:
Behavioural Processes. 119:123-134
Kin recognition requires the ability to discriminate between one's own genetic relatives and non-relatives. There are two mechanisms that aid in kin discrimination: phenotype matching and familiarity. Dogs may be a good model for assessing these mech
Autor:
Moriah Galvan, Jennifer Vonk
Publikováno v:
Animal Cognition. 19:193-205
The ability of domestic dogs (C. lupus famaliaris) to follow and attend to human emotion expressions is well documented. It is unknown whether domestic cats (F. silvestris catus) possess similar abilities. Because cats belong to the same order (Carni
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
Autor:
Jennifer Vonk
Publikováno v:
Animal Cognition. 6:77-86
Four orangutans and one gorilla matched images in a delayed matching-to-sample (DMTS) task based on the relationship between items depicted in those images, thus demonstrating understanding of both first- and second-order relations. Subjects matched
Publikováno v:
Journal of experimental child psychology. 135
We investigated the effect of young children’s (hereafter children’s) facial expressions on adult responsiveness. In Study 1, 131 undergraduate students from a midsized university in the midwestern United States rated children’s images and vide