Search in an environment with an uncertain distribution of resources involves a trade-off between exploitation of past discoveries and further exploration. This extends to information foraging, where a knowledge-seeker shifts between reading in depth and studying new domains. To study this decision-making process, we examine the reading choices made by one of the most celebrated scientists of the modern era: Charles Darwin. From the full-text of books listed in his chronologically-organized reading journals, we generate topic models to quantify his local (...) (text-to-text) and global (text-to-past) reading decisions using Kullback-Liebler Divergence, a cognitively-validated, information-theoretic measure of relative surprise. Rather than a pattern of surprise-minimization, corresponding to a pure exploitation strategy, Darwin’s behavior shifts from early exploitation to later exploration, seeking unusually high levels of cognitive surprise relative to previous eras. These shifts, detected by an unsupervised Bayesian model, correlate with major intellectual epochs of his career as identified both by qualitative scholarship and Darwin’s own self-commentary. Our methods allow us to compare his consumption of texts with their publication order. We find Darwin’s consumption more exploratory than the culture’s production, suggesting that underneath gradual societal changes are the explorations of individual synthesis and discovery. Our quantitative methods advance the study of cognitive search through a framework for testing interactions between individual and collective behavior and between short- and long-term consumption choices. This novel application of topic modeling to characterize individual reading complements widespread studies of collective scientific behavior. (shrink)

We show how faceted search using a combination of traditional classification systems and mixed-membership topic models can go beyond keyword search to inform resource discovery, hypothesis formulation, and argument extraction for interdisciplinary research. Our test domain is the history and philosophy of scientific work on animal mind and cognition. The methods can be generalized to other research areas and ultimately support a system for semi-automatic identification of argument structures. We provide a case study for the application of the methods to (...) the problem of identifying and extracting arguments about anthropomorphism during a critical period in the development of comparative psychology. We show how a combination of classification systems and mixed-membership models trained over large digital libraries can inform resource discovery in this domain. Through a novel approach of “drill-down” topic modeling—simultaneously reducing both the size of the corpus and the unit of analysis—we are able to reduce a large collection of fulltext volumes to a much smaller set of pages within six focal volumes containing arguments of interest to historians and philosophers of comparative psychology. The volumes identified in this way did not appear among the first ten results of the keyword search in the HathiTrust digital library and the pages bear the kind of “close reading” needed to generate original interpretations that is the heart of scholarly work in the humanities. Zooming back out, we provide a way to place the books onto a map of science originally constructed from very different data and for different purposes. The multilevel approach advances understanding of the intellectual and societal contexts in which writings are interpreted. (shrink)

This paper explores the tensions between two disparate approaches to addressing hunger worldwide: Food security and food sovereignty. Food security generally focuses on ensuring that people have economic and physical access to safe and nutritious food, while food sovereignty movements prioritize the right of people and communities to determine their agricultural policies and food cultures. As food sovereignty movements grew out of critiques of food security initiatives, they are often framed as conflicting approaches within the wider literature. This paper explores (...) this tension, arguing that food security is based on a particular model of justice, distributive justice, which limits the sovereignty and autonomy of communities as food producers and consumers. In contrast, food sovereignty movements view food security as a necessary part of food sovereignty, but ultimately insufficient for creating food sustainable communities and limiting wider harms. Rather than viewing food security and food sovereignty as in conflict, we argue that food sovereignty’s justice framework both encompasses and entails justice claims that guide food security projects. (shrink)

Background: Transgender health care is a subject of much debate among clinicians, political commentators, and policy-makers. While the World Professional Association of Transgender Health (WPATH) Standards of Care (SOC) establish clinical standards, these standards contain implied ethics but lack explicit focused discussion of ethical considerations in providing care. An ethics chapter in the SOC would enhance clinical guidelines. Aims: We aim to provide a valuable guide for healthcare professionals, and anyone interested in the ethical aspects of clinical support for gender (...) diverse and transgender people of all ages. Recognizing that the WPATH is a global association, we address broad challenges. We offer a reflection on general ethical principles, providing conceptual tools for healthcare providers, patients, and families to navigate the specific challenges they might encounter in transgender health care, in line with WPATH’s worldwide mission and scope. Method: This article employs a descriptive analysis, and our framework of reference is the four principles of biomedical ethics: respect for autonomy, beneficence, nonmaleficence, and justice. Results: The article presents a discussion on the four ethical principles as applied to transgender health care. We address issues such as respect for patient autonomy in decision-making, the role of beneficence and nonmaleficence in clinical interventions, and the importance of justice in equitable treatment and access to care. Some of the ethical concerns we address in this article pertain to the current sociopolitical climate, where there has been increasing legal interference, internationally, for transgender and nonbinary people, particularly youth, seeking medical care. Discussion: We highlight the interplay between ethical principles and clinical practice, underscoring the need for ethical guidance in addressing the diverse challenges faced by healthcare providers and patients in transgender health care. We advocate for continuous refinement of ethical thinking to ensure that transgender health care is not only medically effective but also ethically sound. (shrink)