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"Warren, Elizabeth"
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A fighting chance
Elizabeth Warren tells the story of the two-decade journey that taught her how Washington really works and really doesn't.
Book
The Fragile Middle Class
Why have so many middle-class Americans encountered so much financial trouble? In this classic analysis of hard-pressed families, the authors discover that financial stability for many middle-class Americans is all too fragile. The authors consider the changing cultural and economic factors that threaten financial security and what they imply for the future vitality of the middle class. A new preface examines the persistent and new threats that have emerged since the original publication. \"[A] fascinating, alarming study. . . . [This] chilling diagnosis of middle-class affliction demonstrates that we all may be only a job loss, medical problem or credit card indulgence away from the downward spiral leading to bankruptcy.\"-Publishers Weekly \"A well-designed and carefully executed study.\"-Andrew Greeley, University of Chicago \"The Fragile Middle Class, a well-written work of social science that is about as gripping as the genre gets, forces us to reevaluate notions about consumerism.\"-American Prospect
eBook
Do chimpanzees (Pan troglodytes) mentally represent collaboration?: Action-learning and communication in a partnered task
Non-human primates engage in complex collective behaviours, but existing research does not paint a clear picture of what individuals cognitively represent when they act together. This study investigates chimpanzees’ capacity for co-representation. If individuals represent others’ actions as they relate to their own during a collaborative task, they should more easily learn to reproduce that action when their roles are switched. In a between-subjects design, we trained ten chimpanzees ( Pan troglodytes ) on a sequential task, in which the first action is performed by either a human partner or a non-social object, and the second action is performed by the subject. We then imposed a breakdown in the action sequence, in which subjects could perform both actions themselves, but received no help from the experimenter or object. We measured subjects’ success in reproducing the first action in the sequence, as well as their attempts to recruit the experimenter’s help using requesting gestures. We found no overall difference in subjects’ ability to perform the first action in the sequence, but we observed significant qualitative differences in their solutions: individuals in the partnered condition replicated the experimenter’s action, while those in the non-social condition achieved the same end using alternative methods. This difference in solution style could indicate that only those chimpanzees in the partnered condition mentally represented the experimenter’s action during the collaborative task. We caution, however, that given the small number of subjects who solved the task, this result could also be driven by individual differences. We also found that subjects consistently produced communicative gestures toward the experimenter, but were more likely to do so after exhausting all actions they could take alone. We suggest that these patterns of behaviour highlight a number of key empirical considerations for the study of coordination in non-human primates.
Journal Article
Interspecies interactions induce exploratory motility in Pseudomonas aeruginosa
Microbes often live in multispecies communities where interactions among community members impact both the individual constituents and the surrounding environment. Here, we developed a system to visualize interspecies behaviors at initial encounters. By imaging two prevalent pathogens known to be coisolated from chronic illnesses, Pseudomonas aeruginosa and Staphylococcus aureus, we observed P. aeruginosa can modify surface motility in response to secreted factors from S. aureus. Upon sensing S. aureus, P. aeruginosa transitioned from collective to single-cell motility with an associated increase in speed and directedness – a behavior we refer to as ‘exploratory motility’. Explorer cells moved preferentially towards S. aureus and invaded S. aureus colonies through the action of the type IV pili. These studies reveal previously undescribed motility behaviors and lend insight into how P. aeruginosa senses and responds to other species. Identifying strategies to harness these interactions may open avenues for new antimicrobial strategies.
Journal Article
Red & white quilts : infinite variety
\"This significant catalog is a highly detailed look at the world's most celebrated collection of red and white quilts. Like the Log Cabin or Baltimore-style, the red and white quilt is a hugely popular genre of quilting. Colorfast Turkey red dye became readily available in the mid-nineteenth century, so red and white quilts became extremely popular, due not only to the newness of the color but also because of the extremely vibrant and punchy contrasting color scheme. Featuring over 650 quilts from the past three centuries, this book is filled with the gorgeous and imaginative designs of feathered stars, diamonds, animals, oak leaves, baskets, lettering, and snowflakes, as well as fascinating examples of careful embroidery and appliquâe. With inspiring handiwork, designs, and visual histories, this book exemplifies the sheer magnitude and poetry of red and white quilts and is a staple compendium of this beloved art form.\" -- Amazon.com
Book
Strengthening Research through Data Sharing
Data sharing can strengthen academic research, the practice of medicine, and the integrity of the clinical trial system. Many policy, privacy, and practical issues need to be addressed, but the stakes are too high to step back in the face of that challenge.
Data sharing has incredible potential to strengthen academic research, the practice of medicine, and the integrity of the clinical trial system. Some benefits are obvious: when researchers have access to complete data, they can answer new questions, explore different lines of analysis, and more efficiently conduct large-scale analyses across trials. Other advantages, such as providing a guardrail against conflicts of interest in a clinical trial system in which external sponsorship of research is common and necessary, are less visible yet just as critical.
I appreciate that there are many policy, privacy, and practical issues that need to be addressed in . . .
Journal Article
Establishing an infrastructure for collaboration in primate cognition research
Inferring the evolutionary history of cognitive abilities requires large and diverse samples. However, such samples are often beyond the reach of individual researchers or institutions, and studies are often limited to small numbers of species. Consequently, methodological and site-specific-differences across studies can limit comparisons between species. Here we introduce the ManyPrimates project, which addresses these challenges by providing a large-scale collaborative framework for comparative studies in primate cognition. To demonstrate the viability of the project we conducted a case study of short-term memory. In this initial study, we were able to include 176 individuals from 12 primate species housed at 11 sites across Africa, Asia, North America and Europe. All subjects were tested in a delayed-response task using consistent methodology across sites. Individuals could access food rewards by remembering the position of the hidden reward after a 0, 15, or 30-second delay. Overall, individuals performed better with shorter delays, as predicted by previous studies. Phylogenetic analysis revealed a strong phylogenetic signal for short-term memory. Although, with only 12 species, the validity of this analysis is limited, our initial results demonstrate the feasibility of a large, collaborative open-science project. We present the ManyPrimates project as an exciting opportunity to address open questions in primate cognition and behaviour with large, diverse datasets.
Journal Article
Conceptualising critical mathematical thinking in young students
International curriculum and policy directions have called to embed critical thinking across discipline areas including mathematics; however, conceptually, this is under-theorised and under-researched in the field of mathematics education. This paper presents the conceptualisation of critical mathematical thinking (CMT) and the application of a literature informed conceptual framework; in particular, it examines what CMT capabilities young students exhibit as they enter formal schooling. We present the findings from one-on-one task-based interviews, undertaken with 16 young students (aged 5–6) as a means to investigate their CMT capabilities and refine the CMT framework. The interview data were analysed using the new critical mathematical thinking conceptual framework. The data confirms the definition and understanding of CMT in young students, indicating a need for curriculum refinement, improved teaching practices, and further research in this area.
Journal Article