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Theories of interval timing have largely focused on accounting for the aggregate properties of behavior engendered by periodic reinforcement, such as sigmoidal psychophysical functions and their scalar property. Many theories of timing also stipulate that timing and motivation are inseparable processes. Such a claim is challenged by fluctuations in and

Theories of interval timing have largely focused on accounting for the aggregate properties of behavior engendered by periodic reinforcement, such as sigmoidal psychophysical functions and their scalar property. Many theories of timing also stipulate that timing and motivation are inseparable processes. Such a claim is challenged by fluctuations in and out of states of schedule control, making it unclear whether motivation directly affects states related to timing. The present paper seeks to advance our understanding of timing performance by analyzing and comparing the distribution of latencies and inter-response times (IRTs) of rats in two fixed-interval (FI) schedules of food reinforcement (FI 30-s and FI 90-s), and in two levels of food deprivation. Computational modeling revealed that each component was well described by mixture probability distributions embodying two-state Markov chains. Analysis of these models revealed that only a subset of latencies are sensitive to the periodicity of reinforcement, and pre-feeding only reduces the size of this subset. The distribution of IRTs suggests that behavior in FI schedules is organized in bouts that lengthen and ramp up in frequency with proximity to reinforcement. Pre-feeding slowed down the lengthening of bouts and increased the time between bouts. When concatenated, these models adequately reproduced sigmoidal FI response functions. These findings suggest that behavior in FI fluctuates in and out of schedule control; an account of such fluctuation suggests that timing and motivation are dissociable components of FI performance. These mixture-distribution models also provide novel insights on the motivational, associative, and timing processes expressed in FI performance, which need to be accounted for by causal theories of interval timing.
ContributorsDaniels, Carter W (Author) / Sanabria, Federico (Thesis advisor) / Brewer, Gene (Committee member) / Wynne, Clive (Committee member) / Arizona State University (Publisher)
Created2015
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Each year, nearly three million dogs will enter one of over 13,000 animal shelters in the United States. The purpose of this dissertation is to better understand how breed identity and dog welfare in the shelter, in addition to post-adoption and fostering interventions out of the shelter, can contribute to

Each year, nearly three million dogs will enter one of over 13,000 animal shelters in the United States. The purpose of this dissertation is to better understand how breed identity and dog welfare in the shelter, in addition to post-adoption and fostering interventions out of the shelter, can contribute to the betterment of dog lives. In Chapter 2, I conducted the largest sampling of shelter dogs’ breed identities to-date to determine their breed heritage and compare shelter breed assignment by staff as determined by visual appearance to that of genetic testing. In Chapter 4, I examined the efficacy of a post-adoption intervention intended to reduce returns by encouraging physical activity between adopters and their dogs. In Chapter 6, I examined the effects of brief stays in a foster home on the urinary cortisol: creatinine ratios of dogs awaiting adoption compared to ratios collected before or after their stays; and in Chapter 7, I characterized the relationships between multiple physiological, health, and cognitive measures and the in-kennel behavior of shelter dogs.

Four suggestions from the findings of this dissertation that will likely better the lives of dogs living in animal shelters are: 1) Shelter dog breed heritage is complex and visually identifying multiple breeds in a mixed breed dog is difficult at best. Shelters should instead focus on communicating the morphology and behavior of the dogs in their care to best support adopters. 2) While encouraging walking did not influence owner behavior, adopters who reported higher obligation and self-efficacy in dog walking were more active with their dogs. Thus, post-adoption interventions that can effectively target owner perceptions of obligation and self-efficacy may be more successful in changing behavior. 3) Temporary fostering is an impactful intervention that reduces stress for dogs awaiting adoption; however addressing stressors present at shelters that are likely contributing to higher stress responding is also needed. 4) It is possible to predict the internal stress responding of shelter dogs by observing their overt, in-kennel behavior, and this study is a first step in assessing and improving the welfare of dogs living in animal shelters.
ContributorsGunter, Lisa (Author) / Wynne, Clive D. L. (Thesis advisor) / Luecken, Linda J. (Committee member) / Barber, Rebecca T. (Committee member) / Casey, Rachel A. (Committee member) / Arizona State University (Publisher)
Created2018
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Description

Does a consistent mentor help a youth transition into a secure and independent adult life? To answer this, I have used a grounded theory methodology to research elements of the foster care system. Through academic research, I audited the landscape of mentoring within foster care and then helped in the

Does a consistent mentor help a youth transition into a secure and independent adult life? To answer this, I have used a grounded theory methodology to research elements of the foster care system. Through academic research, I audited the landscape of mentoring within foster care and then helped in the designing of a framework for a foster youth mentoring service could look like and have researched the areas in which a mentor can benefit a youth. I have listened to and recorded the stories of three college students with lived foster care experience so that I could learn from those who have firsthand experience. After using these methods, the findings showed that a consistent mentor figure is a key factor in the transition into a secure and independent adult life.

ContributorsWebb, Tanner Justin (Author) / Heller, Cheryl (Thesis director) / Stone Sheppard, Nyasha (Committee member) / Department of Supply Chain Management (Contributor) / Dean, W.P. Carey School of Business (Contributor) / Barrett, The Honors College (Contributor)
Created2021-05
Integrated Clinical Animal Behavior
Description

In this paper, I outline the drawbacks with the two main behavioral approaches to animal behavior problems and argue that each alone is insufficient to underpin a field of clinical animal behavior. Applied ethology offers an interest in an animal’s spontaneous behavior in natural contexts, understood within an ecological and

In this paper, I outline the drawbacks with the two main behavioral approaches to animal behavior problems and argue that each alone is insufficient to underpin a field of clinical animal behavior. Applied ethology offers an interest in an animal’s spontaneous behavior in natural contexts, understood within an ecological and evolutionary context, but lacks an awareness of mechanisms that can be manipulated to modify the behavior of individual animals. Behaviorism in the form of Applied Behavior Analysis offers a toolkit of techniques for modifying the behavior of individual animals, but has seldom been applied to non-human species, and often overlooks phylogenetic aspects of behavior. Notwithstanding the historical animosities between the two fields of animal behavior they are philosophically highly compatible – both being empiricist schools stemming ultimately from Darwin’s insights. Though each individually is incomplete, I argue that an integrated approach that synthesizes the strengths of each holds great promise in helping the many animals who need our assistance to survive and thrive in human-dominated environments.

ContributorsWynne, Clive D. L. (Author)
Created2021-02-05