Cushman's rationalization account can be extended to cover another part of his portrayal of representational exchange: thought experiments that lead to conclusions about the self. While Cushman's argument is compelling, a full account of rationalization as adaptive will need to account for the divergence in rationalizing one's actions compared to the actions of others.

Recent progress in artificial intelligence has renewed interest in building systems that learn and think like people. Many advances have come from using deep neural networks trained end-to-end in tasks such as object recognition, video games, and board games, achieving performance that equals or even beats that of humans in some respects. Despite their biological inspiration and performance achievements, these systems differ from human intelligence in crucial ways. We review progress in cognitive science suggesting that truly human-like learning and thinking (...) machines will have to reach beyond current engineering trends in both what they learn and how they learn it. Specifically, we argue that these machines should build causal models of the world that support explanation and understanding, rather than merely solving pattern recognition problems; ground learning in intuitive theories of physics and psychology to support and enrich the knowledge that is learned; and harness compositionality and learning-to-learn to rapidly acquire and generalize knowledge to new tasks and situations. We suggest concrete challenges and promising routes toward these goals that can combine the strengths of recent neural network advances with more structured cognitive models. (shrink)

Cognitive Science, Volume 46, Issue 7, July 2022.

: In this commentary we engage with Paul’s Transformative Experience as it relates to decision making. We consider why deciding whether to undergo a transformative experiences can feel so agonizing yet also be so fun, whether people have any preferences to decide over in the first place, and who people even think they are. Keywords: Transformative Experience; Big Decisions; Preference Construction; Theory of Self; Mental Effort Decisioni trasformative e relative insoddisfazioni Riassunto: In questo commento ci concentreremo su come il volume (...) di L.A. Paul Transformative Experience affronta i processi decisionali. Esamineremo perché la decisione se intraprendere un’esperienza trasformativa possa risultare così struggente ed essere altresì divertente; se le persone abbiano in assoluto qualche preferenza nel prendere decisioni definitive e chi le persone persone ritengono di essere. Parole chiave: Esperienza trasformativa; Grandi decisioni; Costruzione delle preferenze; Teoria del sé; Sforzo mentale. (shrink)

Constructing an intuitive theory from data confronts learners with a “chicken‐and‐egg” problem: The laws can only be expressed in terms of the theory's core concepts, but these concepts are only meaningful in terms of the role they play in the theory's laws; how can a learner discover appropriate concepts and laws simultaneously, knowing neither to begin with? We explore how children can solve this chicken‐and‐egg problem in the domain of magnetism, drawing on perspectives from computational modeling and behavioral experiments. We (...) present 4‐ and 5‐year‐olds with two different simplified magnet‐learning tasks. Children appropriately constrain their beliefs to two hypotheses following ambiguous but informative evidence. Following a critical intervention, they learn the correct theory. In the second study, children infer the correct number of categories given no information about the possible causal laws. Children's hypotheses in these tasks are explained as rational inferences within a Bayesian computational framework. (shrink)

Humans routinely make inferences about both the contents and the workings of other minds based on observed actions. People consider what others want or know, but also how intelligent, rational, or attentive they might be. Here, we introduce a new methodology for quantitatively studying the mechanisms people use to attribute intelligence to others based on their behavior. We focus on two key judgments previously proposed in the literature: judgments based on observed outcomes (you're smart if you won the game) and (...) judgments based on evaluating the quality of an agent's planning that led to their outcomes (you're smart if you made the right choice, even if you didn't succeed). We present a novel task, the maze search task (MST), in which participants rate the intelligence of agents searching a maze for a hidden goal. We model outcome‐based attributions based on the observed utility of the agent upon achieving a goal, with higher utilities indicating higher intelligence, and model planning‐based attributions by measuring the proximity of the observed actions to an ideal planner, such that agents who produce closer approximations of optimal plans are seen as more intelligent. We examine human attributions of intelligence in three experiments that use MST and find that participants used both outcome and planning as indicators of intelligence. However, observing the outcome was not necessary, and participants still made planning‐based attributions of intelligence when the outcome was not observed. We also found that the weights individuals placed on plans and on outcome correlated with an individual's ability to engage in cognitive reflection. Our results suggest that people attribute intelligence based on plans given sufficient context and cognitive resources and rely on the outcome when computational resources or context are limited. (shrink)

We were encouraged by the broad enthusiasm for building machines that learn and think in more human-like ways. Many commentators saw our set of key ingredients as helpful, but there was disagreement regarding the origin and structure of those ingredients. Our response covers three main dimensions of this disagreement: nature versus nurture, coherent theories versus theory fragments, and symbolic versus sub-symbolic representations. These dimensions align with classic debates in artificial intelligence and cognitive science, although, rather than embracing these debates, we (...) emphasize ways of moving beyond them. Several commentators saw our set of key ingredients as incomplete and offered a wide range of additions. We agree that these additional ingredients are important in the long run and discuss prospects for incorporating them. Finally, we consider some of the ethical questions raised regarding the research program as a whole. (shrink)

When people make decisions, they act in a way that is either automatic (“rote”), or more thoughtful (“reflective”). But do people notice when others are behaving in a rote way, and do they care? We examine the detection of rote behavior and its consequences in U.S. adults, focusing specifically on pedagogy and learning. We establish repetitiveness as a cue for rote behavior (Experiment 1), and find that rote people are seen as worse teachers (Experiment 2). We also find that the (...) more a person's feedback seems similar across groups (indicating greater rote-ness), the more negatively their teaching is evaluated (Experiment 3). A word-embedding analysis of an open-response task shows people naturally cluster rote and reflective teachers into different semantic categories (Experiment 4). We also show that repetitiveness can be decoupled from perceptions of rote-ness given contextual explanation (Experiment 5). Finally, we establish two additional cues to rote behavior that can be tied to quality of teaching (Experiment 6). These results empirically show that people detect and care about scripted behaviors in pedagogy, and suggest an important extension to formal frameworks of social reasoning. (shrink)

Salespeople have a moral obligation to prospect/customer, company and self. As such, they continually encounter truth-telling dilemmas. "lgnorance" and "conflict" often block the path to morally correct sales behaviors. Academics and practitioners agree that adoption of ethical codes is the most effective measure for encouraging ethical sales behaviors. Yet no ethical code has been offered which can be conveniently used to overcome the unique circumstances that contribute to the moral dilemmas often encountered in personal selling. An ethical code is developed (...) that charts ethical paths across a variety of sales settings (addressing "ignorance") while illustrating why the cost associated with acting morally is generally reasonable (addressing "conflict"). The code applies the universal transactional notions of customer expectations and salesperson reputation to illustrate why and when salespeople are morally required to tell the truth. In doing so, the code tackles head-on the vexing question of how best to juggle mixed motives - involving self-interests, corporate-concerns, cus-tomer-needs and other influences such as the nature of the transaction. The issue of how mixed motives can be dealt with through moral means is one that ethicists have previously sidestepped (Stark, 1993). (shrink)

Salespeople have a moral obligation to prospect/customer, company and self. As such, they continually encounter truth-telling dilemmas. "lgnorance" and "conflict" often block the path to morally correct sales behaviors. Academics and practitioners agree that adoption of ethical codes is the most effective measure for encouraging ethical sales behaviors. Yet no ethical code has been offered which can be conveniently used to overcome the unique circumstances that contribute to the moral dilemmas often encountered in personal selling. An ethical code is developed (...) that charts ethical paths across a variety of sales settings (addressing "ignorance") while illustrating why the cost associated with acting morally is generally reasonable (addressing "conflict"). The code applies the universal transactional notions of customer expectations and salesperson reputation to illustrate why and when salespeople are morally required to tell the truth. In doing so, the code tackles head-on the vexing question of how best to juggle mixed motives - involving self-interests, corporate-concerns, cus-tomer-needs and other influences such as the nature of the transaction. The issue of how mixed motives can be dealt with through moral means is one that ethicists have previously sidestepped (Stark, 1993). (shrink)

Here the philosopher and physicist David Z Albert argues, among other things, that the difference between past and future can be understood as a mechanical phenomenon of nature and that quantum mechanics makes it impossible to present the entirety of what can be said about the world as a narrative of “befores” and “afters.”.

In this new book, David Harvey seeks to determine what is meant by the term in its different contexts and to identify how accurate and useful it is as a description of contemporary experience.

In _Panpsychism in the West_, the first comprehensive study of the subject, David Skrbina argues for the importance of panpsychism -- the theory that mind exists, in some form, in all living and nonliving things -- in consideration of the nature of consciousness and mind. Despite the recent advances in our knowledge of the brain and the increasing intricacy and sophistication of philosophical discussion, the nature of mind remains an enigma. Panpsychism, with its conception of mind as a general (...) phenomenon of nature, uniquely links being and mind. More than a theory of mind, it is a meta-theory -- a statement about theories of mind rather than a theory in itself. Panpsychism can parallel almost every current theory of mind; it simply holds that, no matter how one conceives of mind, such mind applies to all things. In addition, panpsychism is one of the most ancient and enduring concepts of philosophy, beginning with its pre-historical forms, animism and polytheism. Its adherents in the West have included important thinkers from the very beginning of Greek philosophy through the sixteenth and seventeenth centuries to the present. Skrbina argues that panpsychism is long overdue for detailed treatment, and with this book he proposes to add impetus to the discussion of panpsychism in serious philosophical inquiries. After a brief discussion of general issues surrounding philosophy of mind, he traces the panpsychist views of specific philosophers, from the ancient Greeks and early Renaissance naturalist philosophers through the likes of William James, Josiah Royce, and Charles Sanders Peirce -- always with a strong emphasis on the original texts. In his concluding chapter, "A Panpsychist World View," Skrbina assesses panpsychist arguments and puts them in a larger context. By demonstrating that there is panpsychist thinking in many major philosophers, Skrbina offers a radical challenge to the modern worldview, based as it is on a mechanistic cosmos of dead, insensate matter. _Panpsychism in the West _will be the standard work on this topic for years to come. (shrink)

David Spurrett, David Papineau; A note on the completeness of ‘physics’, Analysis, Volume 59, Issue 1, 1 January 1999, Pages 25–29, https://doi.org/10.1093/anal.

More attention has been devoted to providing evolutionary accounts of the development of beliefs, or belief-like states, than for desires or preferences. Here I articulate and defend an evolutionary rationale for the development of psychologically real preference states. Preferences token or represent the expected values available actions given discriminated states of world and agent. The argument is an application of the ‘environmental complexity thesis’ found in Godfrey-Smith and Sterelny, although my conclusions differ from Sterelny’s. I argue that tokening expected utilities (...) can, under specified general conditions, be a powerful design solution to the problem of efficiently allocating the capacities of an agent. Preferences are for efficient action selection, and count as a ‘fuel for success’ in the sense urged by Godfrey-Smith for true beliefs. They will tend to be favoured by selection when environments are complex in ways that matter to an organism, and when organisms have large behavioural repertoires with heterogeneous returns and costs.The rationale suggested here is conditional, especially on contingencies in what design options are available to selection and on trade-offs associated with the costs of generating and processing representations of value. The unqualified efficiency rationale for preferences suggests that organisms should represent expected utilities in a comprehensive and consistent way, but none of them do. In the final stages of the paper I consider some of the ways design trade-offs compromise the implementation of preferences in organisms that have them. (shrink)

Stawarczyk, Bezdek, and Zacks offer neuroscience evidence for a midline default network core, which appears to coordinate internal, top‐down mentation with externally‐triggered, bottom‐up attention in a push‐pull relationship. The network may enable the flexible pursuance of thoughts tuned into or detached from the current environment.

Throughout the darkest moments of human history, evildoers have convinced communities to turn on groups that are regarded as in some way other and, by starting to think of them as less than human, persecute or even eliminate them. We can all recognize the unfathomable evils of dehumanization in slavery, the Holocaust, the Rwandan genocide, and the Jim Crow South, but we are not free from its power today. With climate change and political upheaval driving millions of refugees worldwide to (...) leave their homes, we are likely to see more and more of this ugly and persistent phenomenon. What are we to do? Drawing on his deep and wide-ranging knowledge of the history, psychology, and politics of dehumanization, David Livingstone Smith shows us how to recognize it and how to fight back. (shrink)

Aware that the representational thesis is more plausible for the attitudinal than for the phenomenal, Dretske courageously focuses on sensory experience, where progress in our philosophical understanding of the mental has lagged. His view, essentially, is that what makes any mental state what it is is not so much what it's like as what it's about.

In this book, David Stump traces alternative conceptions of the a priori in the philosophy of science and defends a unique position in the current debates over conceptual change and the constitutive elements in science. Stump emphasizes the unique epistemological status of the constitutive elements of scientific theories, constitutive elements being the necessary preconditions that must be assumed in order to conduct a particular scientific inquiry. These constitutive elements, such as logic, mathematics, and even some fundamental laws of nature, (...) were once taken to be a priori knowledge but can change, thus leading to a dynamic or relative a priori. Stump critically examines developments in thinking about constitutive elements in science as a priori knowledge, from Kant’s fixed and absolute a priori to Quine’s holistic empiricism. By examining the relationship between conceptual change and the epistemological status of constitutive elements in science, Stump puts forward an argument that scientific revolutions can be explained and relativism can be avoided without resorting to universals or absolutes. (shrink)

Stamos squarely confronts the problem of determining what a biological species is, whether species are real, and the nature of their reality. He critically considers the evolution of the major contemporary views of species and also offers his own solution to the species problem.

David Wiggins; IV*—Moral Cognitivism, Moral Relativism and Motivating Moral Beliefs, Proceedings of the Aristotelian Society, Volume 91, Issue 1, 1 June 1991, P.

Do psychological traits predict philosophical views? We administered the PhilPapers Survey, created by David Bourget and David Chalmers, which consists of 30 views on central philosophical topics (e.g., epistemology, ethics, metaphysics, philosophy of mind, and philosophy of language) to a sample of professional philosophers (N = 314). We extended the PhilPapers survey to measure a number of psychological traits, such as personality, numeracy, well-being, lifestyle, and life experiences. We also included non-technical ‘translations’ of these views for eventual use (...) in other populations. We found limited to no support for the notion that personality or demographics predict philosophical views. We did, however, find that some psychological traits were predictive of philosophical views, even after strict correction for multiple comparisons. Findings include: higher interest in numeracy predicted physicalism, naturalism, and consequentialism; lower levels of well-being and higher levels of mental illness predicted hard determinism; using substances such as psychedelics and marijuana predicted non-realist and subjectivist views of morality and aesthetics; having had a transformative or self-transcendent experience predicted theism and idealism. We discuss whether or not these empirical results have philosophical implications, while noting that 68% of our sample of professional philosophers indicated that such findings would indeed have philosophical value. (shrink)

This book aims to discuss probability and David Hume's inductive scepticism. For the sceptical view which he took of inductive inference, Hume only ever gave one argument. That argument is the sole subject-matter of this book. The book is divided into three parts. Part one presents some remarks on probability. Part two identifies Hume's argument for inductive scepticism. Finally, the third part evaluates Hume's argument for inductive scepticism. Hume's argument that induction must be either deductively valid or circular because (...) based on experience neglects the possibility that it is an argument of non-deductive logic (logical probability, in the sense of Keynes). (shrink)

In this new introduction to a classic philosophical text, David Stern examines Wittgenstein's Philosophical Investigations. He gives particular attention to both the arguments of the Investigations and the way in which the work is written, and especially to the role of dialogue in the book. While he concentrates on helping the reader to arrive at his or her own interpretation of the primary text, he also provides guidance to the unusually wide range of existing interpretations, and to the reasons (...) why the Investigations have inspired such a diversity of readings. Following closely the text of the Investigations and meant to be read alongside it, this survey is accessible to readers with no previous background in philosophy. It is well-suited to university-level courses on Wittgenstein, but can also be read with profit by students in other disciplines. (shrink)

In response to a recent argument by David Bloor, I argue that denying absolutes does not necessarily lead to relativism, that one can be a fallibilist without being a relativist. At issue are the empirical natural sciences and what might be called “framework relativism”, that is, the idea that there is always a conceptual scheme or set of practices in use, and all observations are theory-laden relative to the framework. My strategy is to look at the elements that define (...) a relativist stance and show where the pragmatic fallibilist disagrees. Defending the pragmatic notion of experience will be central, given that relativists reject the idea that experience can play a role in objectively justifying belief. We can reject all absolutes and start from the premise that everything is historical, contingent, and situated. One of the lessons of pragmatism is that universal and fixed principles are not necessary for objective knowledge. (shrink)

In response to a recent argument by David Bloor, I argue that denying absolutes does not necessarily lead to relativism, that one can be a fallibilist without being a relativist. At issue are the empirical natural sciences and what might be called “framework relativism”, that is, the idea that there is always a conceptual scheme or set of practices in use, and all observations are theory-laden relative to the framework. My strategy is to look at the elements that define (...) a relativist stance and show where the pragmatic fallibilist disagrees. Defending the pragmatic notion of experience will be central, given that relativists reject the idea that experience can play a role in objectively justifying belief. We can reject all absolutes and start from the premise that everything is historical, contingent, and situated. One of the lessons of pragmatism is that universal and fixed principles are not necessary for objective knowledge. (shrink)

David Wiggins; IV*—Moral Cognitivism, Moral Relativism and Motivating Moral Beliefs, Proceedings of the Aristotelian Society, Volume 91, Issue 1, 1 June 1991, P.

Geographies of Exclusion identifies forms of social and spatial exclusion and subsequently examines the fate of knowledge of space and society which has been produced by members of excluded groups. Evaluating writing on urban society by women and black writers, David Sibley asks why such work is neglected by the academic establishment, suggesting that both the practices which result in the exclusion of minorities and those which result in the exclusion of knowledge have important implications for theory and method (...) in human geography. Drawing on a range of ideas from social anthropology, feminist theory, sociology, human geography and psychoanalysis, this book presents a fresh approach to geographical theory, highlighting the tendency of powerful groups to "purify" space and to view minorites as defiled and polluting, and exploring the nature of "difference" and the production of knowledge. (shrink)

[A slightly revised version of this paper has been accepted by the BJPS] More attention has been devoted to providing evolutionary scenarios accounting for the development of beliefs, or belief-like states, than for desires or preferences. Here I articulate and defend an evolutionary rationale for the development of psychologically real preference states. Preferences token or represent the expected values of discriminated states, available actions, or action-state pairings. The argument is an application the ‘environmental complexity thesis’ found in Godfrey-Smith and Sterelny, (...) although my conclusions differ from Sterelny’s. I argue that tokening expected utilities can, under specified general conditions, be a powerful design solution to the problem of allocating the capacities of an agent in an efficient way. Preferences are for efficient action selection, and are a ‘fuel for success’ in the sense urged by Godfrey-Smith for true beliefs. They will tend to be favoured by selection when environments are complex in ways that matter to an organism, and when organisms have rich behavioural repertoires with heterogenous returns and costs. The rationale suggested here is conditional, especially on contingencies in what design options are available to selection and on trade-offs associated with the costs of generating and processing representations of value. The unqualified efficiency rationale for preferences suggests that organisms should represent expected utilities in a comprehensive and consistent way, but none of them do. In the final stages of the paper I consider some of the ways in which design trade-offs compromise the implementation of preferences in organisms that have them. (shrink)

Ways of the Hand tells the story of how David Sudnow learned to improvise jazz on the piano. Because he had been trained as an ethnographer and social psychologist, Sudnow was attentive to what he experienced in ways that other novice pianists are not. The result, first published in 1978 and now considered by many to be a classic, was arguably the finest and most detailed account of skill development ever published.Looking back after more than twenty years, Sudnow was (...) struck by the extent to which he had allowed his academic background to shape the book's language. He realized that he could now do a much better job of describing his experiences in a way that would not require facility with formal social science and philosophical discourse. The result is a revised version of the book that carries the same intellectual energy as the original but is accessible to a much wider audience. (shrink)

A striking feature of the latest version of Dennett’s ‘big picture’ of the evolution of life and mind is frequent reference to ‘affordances’. An affordance is, roughly, a possibility for action for a creature in an environment. Given more than one possibility for action, a good question is: what will the creature actually do? I argue that affordances pose a problem of selection, and that a good general solution to this problem of mind-design is to implement a system of preferences.

• If we always see b after a, we are justified in thinking b will follow a the next time we see a. • “A hundred instances or experiments on one side, and fifty on another, afford a doubtful expectation of any event; though a hundred uniform experiments, with only one that is contradictory, reasonably beget a pretty strong degree of assurance” (74).

David Wiggins; XV*—Weakness of Will Commensurability, and the Objects of Deliberation and Desire, Proceedings of the Aristotelian Society, Volume 79, Issue 1, 1.

Many guidelines and commentators endorse the view that clinical research is ethically acceptable only when it has social value, in the sense of collecting data which might be used to improve health. A version of this social value requirement is included in the Declaration of Helsinki and the Nuremberg Code, and is codified in many national research regulations. At the same time, there have been no systematic analyses of why social value is an ethical requirement for clinical research. Recognizing this (...) gap in the literature, recent articles by Alan Wertheimer and David Resnik argue that the extant justifications for the social value requirement are unpersuasive. Both authors conclude, contrary to almost all current guidelines and regulations, that it can be acceptable across a broad range of cases to conduct clinical research which is known prospectively to have no social value. The present article assesses this conclusion by critically evaluating the ethical and policy considerations relevant to the claim that clinical research must have social value. This analysis supports the standard view that social value is an ethical requirement for the vast majority of clinical research studies and should be mandated by applicable guidelines and policies. (shrink)

Rae Langton and Jennifer Hornsby provide accounts of how pornography silences women by appealing to J.L. Austin's account of speech-acts. Since their accounts focus only on instances of silencing where the hearer does not grasp the type of speech-act the speaker intends to perform, their accounts of silencing do not generalize to explain silencing that arises from what Miranda Fricker calls “testimonial injustice.” I argue that silencing arising from testimonial injustice can only be explained by what we shall call the (...) dialectical account of assertion, according to which assertion is the undertaking of a commitment in reasoned discourse. In doing so, I show that accounts of assertion based on speakers' intentions, proposals to common ground, and constitutive norms do not provide the necessary framework to explain silencing within the context of testimonial injustice. Having shown the strength of the dialectical account in explaining silencing, I conclude that the dialectical account also provides a way to remedy some instances of silencing arising from testimonial injustice providing further evidence that the dialectical account is the correct account of assertion. (shrink)

David Kaplan distinguishes between character and content in his theory of demonstratives and indexicals. This paper argues that David Kaplan's theory of demonstratives contains two different, incompatible, descriptions of what character is. It argues that one of them is superior. It argues that, ultimately, a theory of indexicals needs a theory of structured characters.

For this volume David Wiggins has selected and revised eleven of his essays in an area of metaphysics where his work has been particularly influential, and he has added a substantial introduction and one new unpublished essay. Among the subjects treated are substance, identity, persistence, persons, sortals, and artefacts.

This provocative text considers whether evolutionary explanations can be used to clarify some of life’s biggest questions. Examines topics of race, sex, gender, the nature of language, religion, ethics, knowledge, consciousness and ultimately, the meaning of life Each chapter presents a main topic, together with discussion of related ideas and arguments from various perspectives Addresses questions such as: Did evolution make men and women fundamentally different? Is the concept of race merely a social construction? Is morality, including universal human rights, (...) a mass delusion? Can religion and evolution really be harmonized? Does evolution render life meaningless? Written in a clear and informative style, with helpful references for further reading and research. (shrink)

We explore success drivers of reward-based crowdfunding for poverty alleviation in China. The results from our econometric modeling using data from 4375 reward-based crowdfunding campaigns suggest that poverty alleviation campaigns, as compared to ordinary ones, benefit from higher funded amounts, larger backer numbers, and greater success rates. The results also suggest that poverty alleviation campaigns perform better when the products sold originate from poorer (as compared to wealthier) regions and when price premiums are lower (as compared to higher). We corroborate (...) important findings from the field study with an experimental study, showing that the consumer’s feeling of warm glow accounts for the positive effects of poverty alleviation campaigns (as compared to ordinary) campaigns. We expand the applications of warm-glow theory into the context of reward-based crowdfunding campaigns for poverty alleviation and offer new insights into success drivers of such campaigns. (shrink)

Here a group of philosophers, economists and political theorists discuss the work of David Gauthier, which seeks to show that rational individuals would accept certain moral constraints on their choices. The possibilities and limitations of a contractarian approach to issues of justice is analyzed.

This provocative text considers whether evolutionary explanations can be used to clarify some of life’s biggest questions. Examines topics of race, sex, gender, the nature of language, religion, ethics, knowledge, consciousness and ultimately, the meaning of life Each chapter presents a main topic, together with discussion of related ideas and arguments from various perspectives Addresses questions such as: Did evolution make men and women fundamentally different? Is the concept of race merely a social construction? Is morality, including universal human rights, (...) a mass delusion? Can religion and evolution really be harmonized? Does evolution render life meaningless? Written in a clear and informative style, with helpful references for further reading and research. (shrink)