People recognize faces of their own race more accurately than faces of other races. The “contact” hypothesis suggests that this “other‐race effect” occurs as a result of the greater experience we have with own‐ versus other‐race faces. The computational mechanisms that may underlie different versions of the contact hypothesis were explored in this study. We replicated the other‐race effect with human participants and evaluated four classes of computational face recognition algorithms for the presence of an other‐race effect. Consistent with the (...) predictions of a developmental contact hypothesis, “experience‐based models” demonstrated an other‐race effect only when the representational system was developed through experience that warped the perceptual space in a way that was sensitive to the overall structure of the model's experience with faces of different races. When the model's representation relied on a feature set optimized to encode the information in the learned faces, experience‐based algorithms recognized minority‐race faces more accurately than majority‐race faces. The results suggest a developmental learning process that warps the perceptual space to enhance the encoding of distinctions relevant for own‐race faces. This feature space limits the quality of face representations for other‐race faces. (shrink)

A complex brain network, centered on the hippocampus, supports episodic memories throughout their lifetimes. Classically, upon memory encoding during active behavior, hippocampal activity is dominated by theta oscillations (6-10Hz). During inactivity, hippocampal neurons burst synchronously, constituting sharp waves, which can propagate to other structures, theoretically supporting memory consolidation. This 'two-stage' model has been updated by new data from high-density electrophysiological recordings in animals that shed light on how information is encoded and exchanged between hippocampus, neocortex and subcortical structures such as (...) the striatum. Cell assemblies (tightly related groups of cells) discharge together and synchronize across brain structures orchestrated by theta, sharp waves and slow oscillations, to encode information. This evolving dynamical schema is key to extending our understanding of memory processes. (shrink)

This book is a volume in the Penn Press Anniversary Collection. To mark its 125th anniversary in 2015, the University of Pennsylvania Press rereleased more than 1,100 titles from Penn Press's distinguished backlist from 1899-1999 that had fallen out of print. Spanning an entire century, the Anniversary Collection offers peer-reviewed scholarship in a wide range of subject areas.

Preface Phillip R. Sloan, Gerald McKenny, Kathleen Eggleson pp. xiii-xviii In November of 2009, the University of Notre Dame hosted the conference “Darwin in the Twenty-First Century: Nature, Humanity, and God.‘ Sponsored primarily by the John J. Reilly Center for Science, Technology, and Values at Notre Dame, and the Science, Theology, and the Ontological Quest project within the Vatican Pontifical... 1. Introduction: Restructuring an Interdisciplinary Dialogue Phillip R. Sloan pp. 1-32 Almost exactly fifty years before the Notre Dame (...) conference, the world’s largest centenary commemoration of Darwin’s legacy was held at nearby University of Chicago. This event, organized by a committee spearheaded by University of Chicago anthropologist Sol Tax, drew nearly 2,500 registrants. In attendance were the primary leaders... Part 1. Nature 2. Evolution through Developmental Change: How Alterations in Development Cause Evolutionary Changes in Anatomy Scott F. Gilbert pp. 35-60 For the past half-century, the mechanisms of evolution have been explained by the fusion of genetics and evolutionary biology called “the Modern Synthesis.‘ The tenets of the Modern Synthesis have been generally formulated as such: 1. There is genetic variation within the population. 2. There is competition... 3. The Evolution of Evolutionary Mechanisms: A New Perspective Stuart A. Newman pp. 61-89 The Modern Evolutionary Synthesis, based on Charles Darwin’s concept of natural selection in conjunction with a genetic theory of inheritance in a population-based framework, has been, for more than six decades, the dominant scientific perspective for explaining the diversity of living organisms. In recent years, however, with the growth... 4. The Evolvability of Organic Forms: Possible, Likely, and Unlikely Change from the Perspective of Evolutionary Developmental Biology Alessandro Minelli pp. 90-115 Confronted with the extraordinary diversity of animal form, we can ask questions about function and adaptation. How does this animal move? How does it feed? How does it defend itself from its enemies? But we can also ask questions about development, reproduction, and heredity. What mechanisms produce these forms? How are these... 5. Accident, Adaptation, and Teleology in Aristotle and Darwinism David J. Depew pp. 116-143 Charles Darwin framed the Origin of Species to meet criteria for inductive science set out by John Herschel in his Preliminary Discourse on the Study of Natural Philosophy. Accordingly, he was distraught when he learned that Herschel, to whom he had sent a copy of his newly published book, was not... 6. The Game of Life Implies Both Teleonomy and Teleology Gennaro Auletta, Ivan Colagè, Paolo D’Ambrosio pp. 144-164 The present contribution is mainly aimed at suggesting the importance of teleonomy and teleology as explanatory mechanisms in biology in the light of recent achievements in the field, and at showing that they play an actual and relevant role in the realm of life. The issue of finality in biology still provokes lively debates in the... Part 2. Humanity 7. Humanity’s Origins Bernard Wood pp. 167-181 One of Charles Darwin’s many achievements is that he began the process of converting the Tree of Life from a religious metaphor into a biological reality. All types of living organisms, be they animals, plants, fungi, bacteria, or viruses, are at the end of twigs that reach the surface of the Tree of Life, and all the types of organisms... 8. Darwin’s Evolutionary Ethics: The Empirical and Normative Justifications Robert J. Richards pp. 182-200 In the increasingly secular atmosphere of the nineteenth century, intellectuals grew wary of the idea that nature had any moral authority. In an earlier age, one might have looked upon the dispositions of nature as divinely sanctioned, and thus one could call upon natural law to ground moral judgment. Certain behaviors, for instance, might have... 9. Crossing the Milvian Bridge: When Do Evolutionary Explanations of Belief Debunk Belief? Paul E. Griffiths, John S. Wilkins pp. 201-231 Two traditional targets for evolutionary skepticism are religion and morality. Evolutionary skeptical arguments against religious belief are continuous with earlier genetic arguments against religion, such as that implicit in David Hume’s Natural History of Religion. Evolutionary arguments are also... 10. Questioning the Zoological Gaze: Darwinian Epistemology and Anthropology Phillip R. Sloan pp. 232-266 This quotation from Darwin’s Descent of Man illuminates an under-explored issue in Darwin’s work---not the issue of evolutionary ethics itself, but the epistemology of experience assumed in his work, and the consequences of his application of this “zoological gaze‘ to human beings. I will term this epistemological stance in this chapter “natural historical... Part 3. God 11. Evolution and Catholic Faith John O’Callaghan pp. 269-298 To begin to examine the relation of orthodox Catholic Christian faith to evolutionary theory and the question of human origins, consider words of the fourth pope, St. Clement: Let us fix our gaze on the Father and Creator of the whole world, and let us hold on to his peace and blessings, his splendid and surpassing... 12. After Darwin, Aquinas: A Universe Created and Evolving William E. Carroll pp. 299-337 At the 2000 Jubilee Session for scientists, held at the Vatican in May of that year, Archbishop Józef Życiński offered an eloquent assessment of contemporary discourse on the relationship between the natural sciences and theology. He ended his address with the comment that what is needed today is a new Thomas Aquinas. I remember... 13. Evolutionary Theism and the Emergent Universe Józef Życiński pp. 338-354 The 150th anniversary of the publication of Charles Darwin’s The Origin of Species has been celebrated in the context of an animated debate concerning both scientific and philosophical issues implied by the theory of evolution.1 One finds a deep diversity of attitudes, both methodological and semantic, in the current debates on evolutionary... 14. Beyond Separation or Synthesis: Christ and Evolution as Theodrama Celia Deane-Drummond pp. 355-380 The fervor with which popular discourse on science and religion has continued to bubble up in the anniversary year celebrating Darwin’s achievements shows that the publically perceived conflict between science and religion will not go away. Academic discussion on such matters is therefore not just peripheral to cultural concerns but takes... Part 4. Past and Future Prospects 15. Imagining a World without Darwin Peter J. Bowler pp. 383-403 What would have happened if Charles Darwin had not lived to write On the Origin of Species? Perhaps his bad health caused the early death he feared, or maybe he fell overboard while on the voyage of the Beagle. Would the world have still experienced the Darwinian Revolution under another name, or would the history of science, and... 16. What Future for Darwinism? Jean Gayon pp. 404-423 What future for Darwinism? I will propose some criteria for exploring this question in the domains of both evolutionary biology and the human sciences. Do not expect me to tell you where we will stand thirty years from now. It will be enough to identify a few general tendencies. For the sake of brevity, I will not devote a preamble to explain... Contributors pp. 424-430. (shrink)