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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Effects of environmental enrichment on fundamental cognitive processes in rats and humans /

Woodcock, Elizabeth Ann. January 2004 (has links)
Thesis (Ph. D.)--University of New South Wales, 2004. / Also available online.

Gestural communication in orangutans (Pongo pygmaeus and Pongo abelii) : a cognitive approach /

Cartmill, Erica A. January 2008 (has links)
Thesis (Ph.D.) - University of St Andrews, August 2008.

Social information gathering in lemurs /

Ruiz, April M. January 2009 (has links)
Thesis (Ph.D.) - University of St Andrews, November 2009. / Restricted until 5th November 2011.

Social play as a tool for developing social-cognitive skills in a wild population of Atlantic spotted dolphins (Stenella frontalis)

Unknown Date (has links)
The purposes of this dissertation were to identify complex social-cognitive behaviors in a population of wild Atlantic spotted dolphins (Stenella frontalis) using long-term video archives and identify developmental trends in those behaviors. Chapter One analyzed calf behavior during foraging events involving maternal teaching in order to identify mechanisms for sharing information between mother and calf... The calves' behavior was affected by the referencing cues, supporting the presence of joint attention and true teaching behavior....Chapter Two observed the altered benthic foraging behavior of juvenile play groups, in which juveniles took turns chasing the fish and using referencing gestures to reference the position of the fish to other individuals during the chase, despite the ability of these young, independent dolphins to catch fish much more quickly and efficiently alson... The third chapter analyzed social object play in which dolphins passed pieces of seaweed between individuals. The data clarified developmental trends in the play, and suggested social-cognitive abilities needed for participation. / by Courtney Elizabeth Bender. / Thesis (Ph.D.)--Florida Atlantic University, 2012. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.

Social manipulation in the bottlenose dolphin : a study of deception and inhibition

Miller, Amy A January 2004 (has links)
Thesis (M.A.)--University of Hawaii at Manoa, 2004. / Includes bibliographical references (leaves 125-135). / vii, 135 leaves, bound ill. 29 cm

Pictorial primates : a search for iconic abilities in great apes /

January 1900 (has links)
Thesis (doctoral)--Lund University, 1999. / Includes bibliographical references (p. 287-306). Also available on the Internet.

Investigating the role of cognition in nest construction in birds

Muth, Felicity January 2013 (has links)
Nest building in birds has long been assumed to be a behaviour that is not learned, despite suggestive evidence to the contrary. In this thesis I investigated the role of learning in nest building in birds. I focused primarily on the choice of nest material made by zebra finches, in particular between two or more colours of nesting material. Using this aspect of behaviour, I found that adult nest building birds changed their preference for a particular colour of nesting material depending on their own nesting and breeding experience: males that built a nest using material of their less preferred colour later preferred that colour following a successful breeding attempt in that nest. In contrast to this role for learning in adults, in two other experiments I found no evidence that juvenile birds learned about the nest from which they had fledged or that birds learned about what material to nest with from conspecifics. Using wild Southern masked weavers, I also addressed variability in a particular aspect of nest building: the attachment of the very first blade of grass knotted onto a branch. I found that birds did not construct the same attachment each time they did it, even when building at the same location, but that males generally used more loops in their attachments as they built more nests, and when using longer pieces of grass. Finally, I tested zebra finches on a nest building ‘task', using a paradigm often used to test cognitive abilities among tool-users. Birds were presented with two lengths of nest material, one of which was more appropriate for one of two sizes of nest box entrance. I found that nesting birds could choose the appropriate length of material and that the birds' handling of material and their choice of material changed with experience. Taking these results together, it seems that there is a greater role for learning in nest construction than is generally acknowledged and that nest building might involve the same underlying cognitive processes as tool manufacture and use.

Heading in the right direction: the behavior and brain mechanisms of directional navigation

Unknown Date (has links)
The mechanisms that rodents employ to navigate through their environment have been greatly studied. Cognitive mapping theory suggests that animals use distal cues in the environment to navigate to a goal location (place navigation). However, others have found that animals navigate in a particular direction to find a goal (directional navigation). The rodent brain contains head direction cells (HD cells) that discharge according to the head direction of the animal. Navigation by heading direction is disrupted by lesions of the anterodorsal thalamic nuclei (ADN), many of which are HD cells. Aim 1 tested whether male C57BL/6J mice exhibit direction or place navigation in the Morris water maze. Aim 2 tested the effects of temporary inactivation of the ADN on directional navigation. Together, these data indicate that C57BL/6J mice also exhibit preference for directional navigation and suggest that the ADN may be crucial for this form of spatial navigation. / by Sidney Beth Williams. / Thesis (M.A.)--Florida Atlantic University, 2009. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2009. Mode of access: World Wide Web.

Personality Traits in Atlantic Spotted Dolphins (Stenella Frontalis): Syndromes and Predictors of Neophilia

Unknown Date (has links)
Personality is defined as inter-individual variation of behavioral traits while maintaining intra-individual stability. The focus of this study was to observe distinct personality trait categories, establish baseline personality trait phenotypes for the juvenile population, and compare the personality phenotypes between different categories, such as sex or generation. Three personality traits were studied—sociability, curiousity, and boldness—based on the percentage of time individuals spent with conspecifics, human researchers, and their mothers, respectively. The surveyed individuals significantly varied positively and negatively from the means of each trait, and no significant difference for any trait was found between males and females, or across time periods. A moderately strong correlation was discovered between two personality traits, boldness and curiousity, suggesting a personality syndrome. The second primary goal was to use the aforementioned baseline to determine if personality traits can be used to predict neophilic behavior specific to human-dolphin communication research. Six of the study subjects were more prone than their peers to engage with the two-way work, and these individuals were more bold—spent less time with their mothers—than the other subjects. This suggests that boldness has some predictive capabilities towards this type of neophilia. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2016. / FAU Electronic Theses and Dissertations Collection

Chimpanzee alarm communications: a zoosemiotic study

Unknown Date (has links)
Evidence for conceptual semantics is well established in monkeys, however this basis of human language is less evident in the great apes. In order to study semantic communications in chimpanzees, I analyzed alarm calls produced towards a blimp as it was flying overhead. I then replayed a set of these alarm calls to the chimps on a different day. The chimps appeared to act in a manner consistent with the presence of the blimp. The calls they produced in response to the playback stimuli were nearly identical to the calls that were produced during the actual flyover. Though the data collected were not sufficient to support a definitive claim, it does appear that the chimpanzees of the study have a meaning-laden vocalization for the aerial stimuli. Whether this call is specific to the blimp or generalizable to other aerial threats is yet to be determined. / by Alyssa M. Raymond. / Thesis (M.A.)--Florida Atlantic University, 2012. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2012. Mode of access: World Wide Web.

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