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Articles 31 - 46 of 46
Full-Text Articles in Biological Psychology
Evidence For Animal Grief?, Carolyn Ristau
Evidence For Animal Grief?, Carolyn Ristau
Animal Sentience
The nature of evidence appropriate to the study of animal emotion (and cognition) is discussed in this review with reference to Barbara King’s book. How Animals Grieve is beautifully written, but it intermixes examples meeting King’s criteria for evidence of grief with other poignant but far less convincing examples. Yet, as noted earlier by Griffin (1958/1974), “Excessive caution can sometimes lead one as far astray as rash enthusiasm.” King cites strong evidence from long-term scientific field studies, often involving known individuals; from videotapes; from convergent evidence in neurophysiological studies; and, notwithstanding possible emotional bias, from animals living closely with humans. …
Multidimensional Approach To Comparative Avian Visual Systems, Bret Alan Moore
Multidimensional Approach To Comparative Avian Visual Systems, Bret Alan Moore
Open Access Dissertations
Since the birth of visual ecology, comparative studies on how birds see their world have been limited to a small number of species and tended to focus on a single visual trait. This approach has constrained our ability to understand the diversity and evolution of the avian visual system. The goal of this dissertation was to characterize multiple visual dimensions on bird groups that are highly speciouse (e.g., Passeriformes), and test some hypotheses and predictions, using modern comparative tools, on the relationship between different visual traits and their association with visual information sampling behaviors. First, I developed a novel method …
Evolutionary Pressures On Primate Intertemporal Choice, Jeffrey R. Stevens
Evolutionary Pressures On Primate Intertemporal Choice, Jeffrey R. Stevens
Department of Psychology: Faculty Publications
From finding food to choosing mates, animals must make intertemporal choices that involve fitness benefits available at different times. Species vary dramatically in their willingness to wait for delayed rewards. Why does this variation across species exist? An adaptive approach to intertemporal choice suggests that time preferences should reflect the temporal problems faced in a species' environment. Here, I use phylogenetic regression to test whether allometric factors (relating to body size), relative brain size, and social group size predict how long 13 primate species will wait in laboratory intertemporal choice tasks. Controlling for phylogeny, a composite allometric factor that includes …
Visual Search And Attention In Blue Jays (Cyanocitta Cristata): Associative Cuing And Sequential Priming, Kazuhiro Goto, Alan B. Bond, Marianna Burks, Alan C. Kamil
Visual Search And Attention In Blue Jays (Cyanocitta Cristata): Associative Cuing And Sequential Priming, Kazuhiro Goto, Alan B. Bond, Marianna Burks, Alan C. Kamil
Alan Bond Publications
Visual search for complex natural targets requires focal attention, either cued by predictive stimulus associations or primed by a representation of the most recently detected target. Because both processes can focus visual attention, cuing and priming were compared in an operant search task to evaluate their relative impacts on performance and to determine the nature of their interaction in combined treatments. Blue jays were trained to search for pairs of alternative targets among distractors. Informative or ambiguous color cues were provided before each trial, and targets were presented either in homogeneous blocked sequences or in constrained random order. Initial task …
Direct And Relational Representation During Transitive List Linking In Pinyon Jays (Gymnorhinus Cyanocephalus), Cynthia Wei, Alan Kamil, Alan B. Bond
Direct And Relational Representation During Transitive List Linking In Pinyon Jays (Gymnorhinus Cyanocephalus), Cynthia Wei, Alan Kamil, Alan B. Bond
Alan Bond Publications
The authors used the list-linking procedure (Treichler & Van Tilburg, 1996) to explore the processes by which animals assemble cognitive structures from fragmentary and often contradictory data. Pinyon jays (Gymnorhinus cyanocephalus) were trained to a high level of accuracy on two implicit transitive lists. They were then given linkage training on the single pair that linked the two lists into a composite, 10-item hierarchy. Following linkage training, the birds were tested on nonadjacent probe pairs drawn both from within (B-D and 2–4) and between (D-1, E-2, B-2, C-3) each original list. Linkage training resulted in a significant transitory disruption in …
The Effect Of Visual Wulst Lesions And Trigeminal Nerve Sectioning On The Discrimination Of Magnetic Inclination In The Homing Pigeon (Columba Livia), Merissa Acerbi
Honors Projects
The ability of homing pigeons to return to their loft from unknown places has fascinated scientists for centuries. It is well established that homing pigeons, like migratory birds, posses an innate magnetic inclination compass to determine direction by measuring the angle between the magnetic field vector and the Earth's surface. Recent work has indicated that the avian magnetic compass is light mediated and appears to mediate magnetic information to the brain. This occurs via a visual pathway with processing in the visual Wulst area of the forebrain. There is, however, also evidence from other avian species that magnetic direction may …
The Lives Of Others: Social Rationality In Animals, Jeffrey R. Stevens, Andrew J. King
The Lives Of Others: Social Rationality In Animals, Jeffrey R. Stevens, Andrew J. King
Jeffrey Stevens Publications
Darwin (1871) boldly claimed that humans and other animals differ very little in their cognition; a statement that has raised the ire of many scientists (Bolhuis & Wynne, 2009; Penn, Holyoak, & Povinelli, 2008). Rather than stating this continuity as a fact, we will explore the similarities and differences between humans and animals in the social rationality of their decision making. We find this a fruitful exercise because it can profit researchers of both humans and animals. Our purpose here is to provide an evolutionary background of social rationality: Why do animals attend to the lives of others? To this …
Picture Recognition Of Food By Macaques (Macaca Silenus), Peter G. Judge
Picture Recognition Of Food By Macaques (Macaca Silenus), Peter G. Judge
Faculty Journal Articles
Pictorial representations of three-dimensional objects are often used to investigate animal cognitive abilities; however, investigators rarely evaluate whether the animals conceptualize the two-dimensional image as the object it is intended to represent. We tested for picture recognition in lion-tailed macaques by presenting five monkeys with digitized images of familiar foods on a touch screen. Monkeys viewed images of two different foods and learned that they would receive a piece of the one they touched first. After demonstrating that they would reliably select images of their preferred foods on one set of foods, animals were transferred to images of a second …
Mechanisms For Decisions About The Future, Jeffrey R. Stevens
Mechanisms For Decisions About The Future, Jeffrey R. Stevens
Jeffrey Stevens Publications
Evolutionary and psychological perspectives on decision making remain largely separate endeavors. The bounded rationality approach integrates these two perspectives by focusing on simple, plausible mechanisms of decision making and the cognitive capacities needed to implement these mechanisms. Decisions about the future provide a class of decisions that lend themselves to a bounded rationality approach. Though many different mechanisms may exist for making decisions about the future, only a subset of these mechanisms actually require a representation of the future. The bounded rationality approach helps focus on the cognitive capacities and decision mechanisms that are necessary for a full understanding of …
Parental Precaution: Neurobiological Means And Adaptive Ends, Jennifer Hahn-Holbrook, Colin Holbrook, Martie G. Haselton
Parental Precaution: Neurobiological Means And Adaptive Ends, Jennifer Hahn-Holbrook, Colin Holbrook, Martie G. Haselton
Psychology Faculty Articles and Research
Humans invest precious reproductive resources in just a few offspring, who remain vulnerable for an extended period of their lifetimes relative to other primates. Therefore, it is likely that humans evolved a rich precautionary psychology that assists in the formidable task of protecting offspring. In this review, we integrate precautionary behaviors during pregnancy and postpartum with the adaptive functions they may serve and what is known of their biological mediators, particularly brain systems motivating security and attachment. We highlight the role of reproductive hormones in (i) priming parental affiliation with young to incentivize offspring protection, (ii) focusing parental attention on …
Effects Of Early Developmental Stress On Adult Physiology And Behavior, Michael James Frederick
Effects Of Early Developmental Stress On Adult Physiology And Behavior, Michael James Frederick
Legacy Theses & Dissertations (2009 - 2024)
Events during early development can have long-term effects on physiology and behavior. While extreme developmental stress is known to be associated with a variety of behavioral problems, it is less well understood how milder stress may affect behavior, personality, and reproductive success. This research project assessed a variety of behavioral dimensions in a college age sample, while assessing early development using size at birth, fluctuating asymmetry, and retrospective surveys. Maternal stress during pregnancy was found to reduce adolescent growth spurts and adult handgrip strength in the offspring. In males, lower birth weights were associated with higher scores of impulsivity and …
Functionality, Parsimony, Discovery, Avoiding Hamartia: How Evolutionary Perspectives Are Changing Psychology, Brooke N. Jenkins, Aaron T. Goetz
Functionality, Parsimony, Discovery, Avoiding Hamartia: How Evolutionary Perspectives Are Changing Psychology, Brooke N. Jenkins, Aaron T. Goetz
Psychology Faculty Articles and Research
Evolutionary psychology offers an important perspective to scientific psychology. Evolutionary psychology, in its short existence, has added an abundance of knowledge to the social sciences, let alone psychology. The study of human cognition and behavior remains incomplete without an evolutionary perspective. Here, we argue that evolutionary psychology uniquely provides a complete understanding of scientific psychology because it explains the functions of our psychological traits, provides us with the most parsimonious explanation of many psychological phenomena, predicts undocumented phenomena, and possibly allows us to avoid the downfalls of some of our contemptible evolved psychological mechanisms.
Observations Of Rough-Toothed Dolphins (Steno Bredanensis) Off The Coast Of Utila, Honduras, Stan A. Kuczaj Ii, Deirdre Yeater
Observations Of Rough-Toothed Dolphins (Steno Bredanensis) Off The Coast Of Utila, Honduras, Stan A. Kuczaj Ii, Deirdre Yeater
Psychology Faculty Publications
Local dive shop operators and fishermen report that rough-toothed dolphins (Steno bredanensis) are frequently encountered off the coast of Utila, Honduras, (16°05'46.5"N 86°55'47.8"W). Our observations suggest that at least some of these animals may constitute a resident population, although the extent of the resident group’s home range has not been determined. Twenty-eight rough-toothed dolphins were identified using photoidentification techniques, 15 of which were re-sighted on two or more occasions. The 12 animals that were re-sighted four or more times were typically seen together, suggesting that they constitute a stable social group. At least one of these dolphins is …
The Selfish Nature Of Generosity: Harassment And Food Sharing In Primates, Jeffrey R. Stevens
The Selfish Nature Of Generosity: Harassment And Food Sharing In Primates, Jeffrey R. Stevens
Jeffrey Stevens Publications
Animals may share food to gain immediate or delayed fitness benefits. Previous studies of sharing have concentrated on delayed benefits such as reciprocity, trade and punishment. This study tests an alternative model (the harassment or sharing–under–pressure hypothesis) in which a food owner immediately benefits because sharing avoids costly harassment from a beggar. I present an experiment that varies the potential ability of the beggar to harass, and of the owner to defend the food, to examine the effects of harassment on food sharing in two primate species: chimpanzees (Pan troglodytes) and squirrel monkeys (Saimiri boliviensis). For …
Discounting And Reciprocity In An Iterated Prisoner’S Dilemma, David W. Stephens, Colleen M. Mclinn, Jeffrey R. Stevens
Discounting And Reciprocity In An Iterated Prisoner’S Dilemma, David W. Stephens, Colleen M. Mclinn, Jeffrey R. Stevens
Jeffrey Stevens Publications
The Iterated Prisoner’s Dilemma (IPD) is a central paradigm in the study of animal cooperation. According to the IPD framework, repeated play (repetition) and reciprocity combine to maintain a cooperative equilibrium. However, experimental studies with animals suggest that cooperative behavior in IPDs is unstable, and some have suggested that strong preferences for immediate benefits (that is, temporal discounting) might explain the fragility of cooperative equilibria. We studied the effects of discounting and strategic reciprocity on cooperation in captive blue jays. Our results demonstrate an interaction between discounting and reciprocity. Blue jays show high stable levels of cooperation in treatments with …
Behavioral Response Of The Crayfish Procambarus Clarkii To The Crustacean Molting Hormone 20-Hydroxyecdysone, William D. Hornsby
Behavioral Response Of The Crayfish Procambarus Clarkii To The Crustacean Molting Hormone 20-Hydroxyecdysone, William D. Hornsby
Honors Capstone Projects and Theses
No abstract provided.