The effect of task difficulty on inter-task transfer is a classic issue in motor learning. We examined the relation between self-efficacy and transfer of learning after practicing different versions of a stick balancing task. Practicing the same task or an easier version led to significant pre- to post-test transfer of learning, whereas practicing a more difficult version did not. Self-efficacy increased modestly from pre- to post-test with easy practice, but decreased significantly with difficult practice. In addition, self-efficacy immediately prior to (...) the post-test was significantly lower after difficult practice than easy or intermediate practice. Self-efficacy immediately prior to the post-test, performance at the end of practice, and pre-test performance explained 75% of the variance in post-test performance. The mediating role of self-efficacy on transfer of learning offers an alternative explanation for recent findings on the superiority of easy-to-difficult transfer and may help clarify inconsistencies in earlier research. (shrink)

Contemporary philosophers of mind tend to assume that the world of nature can be reduced to basic physics. Yet there are features of the mind consciousness, intentionality, normativity that do not seem to be reducible to physics or neuroscience. This explanatory gap between mind and brain has thus been a major cause of concern in recent philosophy of mind. Reductionists hold that, despite all appearances, the mind can be reduced to the brain. Eliminativists hold that it cannot, and that this (...) implies that there is something illegitimate about the mentalistic vocabulary. Dualists hold that the mental is irreducible, and that this implies either a substance or a property dualism. Mysterian non-reductive physicalists hold that the mind is uniquely irreducible, perhaps due to some limitation of our self-understanding. In this book, Steven Horst argues that this whole conversation is based on assumptions left over from an outdated philosophy of science. While reductionism was part of the philosophical orthodoxy fifty years ago, it has been decisively rejected by philosophers of science over the past thirty years, and for good reason. True reductions are in fact exceedingly rare in the sciences, and the conviction that they were there to be found was an artifact of armchair assumptions of 17th century Rationalists and 20th century Logical Empiricists. The explanatory gaps between mind and brain are far from unique. In fact, in the sciences it is gaps all the way down.And if reductions are rare in even the physical sciences, there is little reason to expect them in the case of psychology. Horst argues that this calls for a complete re-thinking of the contemporary problematic in philosophy of mind. Reductionism, dualism, eliminativism and non-reductive materialism are each severely compromised by post-reductionist philosophy of science, and philosophy of mind is in need of a new paradigm. Horst suggests that such a paradigm might be found in Cognitive Pluralism: the view that human cognitive architecture constrains us to understand the world through a plurality of partial, idealized, and pragmatically-constrained models, each employing a particular representational system optimized for its own problem domain. Such an architecture can explain the disunities of knowledge, and is plausible on evolutionary grounds. (shrink)

This book introduces an account of cognitive architecture, Cognitive Pluralism, on which the basic units of understanding are models of particular content domains. Having many mental models is a good adaptive strategy for cognition, but models can be incompatible with one another, leading to paradoxes and inconsistencies of belief, and it may not be possible to integrate the understanding supplied by multiple models into a comprehensive and self-consistent "super model". The book applies the theory to explaining intuitive reasoning and cognitive (...) illusions and explores implications for epistemology, semantics, and disunity of science. (shrink)

In this carefully argued critique, Steven Horst pronounces the theory deficient.

The issue of whether or not there are visual arguments has been an issue in informal logic and argumentation theory at least since 1996. In recent years, books, sections of prominent conferences and special journals issues have been devoted to it, thus significantly raising the profile of the debate. In this paper I will attempt to show how the views of the later Wittgenstein, particularly his views on images and the no- tion of “picturing”, can be brought to bear on (...) the question of whether there are such things as “purely visual” arguments. I shall draw on Wittgenstein’s remarks in the Blue and Brown Books and in Philosophical Investigations in order to argue that al- though visual images may occur as elements of argumentation, broadly conceived, it is a mistake to think that there are purely visual arguments, in the sense of illative moves from premises to conclusions that are conveyed by images alone, without the support or framing of words. (shrink)

Since the seventeenth century, our understanding of the natural world has been one of phenomena that behave in accordance with natural laws. While other elements of the early modern scientific worldview may be rejected or at least held in question—the metaphor of the world as a great machine, the narrowly mechanist assumption that all physical interactions must be contact interactions, the idea that matter might actually be obeying rules laid down by its Divine Author – the notion of natural law (...) has continued to play a pivotal role in actual scientific practice, in our philosophical interpretations of science, and in their its metaphysical implications. (shrink)

During human evolutionary history, there were “trade-offs” between expending time and energy on child-rearing and mating, so both men and women evolved conditional mating strategies guided by cues signaling the circumstances. Many short-term matings might be successful for some men; others might try to find and keep a single mate, investing their effort in rearing her offspring. Recent evidence suggests that men with features signaling genetic benefits to offspring should be preferred by women as short-term mates, but there are trade-offs (...) between a mate's genetic fitness and his willingness to help in child-rearing. It is these circumstances and the cues that signal them that underlie the variation in short- and long-term mating strategies between and within the sexes. Key Words: conditional strategies; evolutionary psychology; fluctuating asymmetry; mating; reproductive strategies; sexual selection. (shrink)

In this paper I begin by examining Fogelin’s account of deep disagreement. My contention is that this account is so deeply flawed as to cast doubt on the possibility that such deep disagreements actually happen. Nevertheless, I contend that the notion of deep disagreement itself is a useful theoretical foil for thinking about argumentation. The second part of this paper makes this case by showing how thinking about deep disagreements from the perspective of rhetoric, Walton-style argumentation theory, computation, and normative (...) pragmatics can all yield insights that are useful no matter what one’s orientation within the study of argument. Thus, I conclude that deep disagreement –even if it were to turn out that there are no real-world occurrences of it to which we can point–is useful for theorists of argumentation. In this wise, deep disagreement poses a theoretical challenge for argumentation theory not unlike that posed by radical skepticism for traditional epistemology. (shrink)

Using Buddhist thought, explores and challenges the philosophy of Jean-Paul Sartre.

DNA helicases catalyze the disruption of the hydrogen bonds that hold the two strands of double‐stranded DNA together. This energy‐requiring unwinding reaction results in the formation of the single‐stranded DNA required as a template or reaction intermediate in DNA replication, repair and recombination. A combination of biochemical and genetic studies have been used to probe and define the roles of the multiple DNA helicases found in E. coli. This work and similar efforts in eukaryotic cells, although far from complete, have (...) established that DNA helicases are essential components of the machinery that interacts with the DNA molecule. (shrink)

For better or for worse, I find myself in the company of the `misers' of Galen Strawson's portrayal who, in response to the question, `Is there such a thing as the self?' rejoin: `Well, there is something of which the sense of the self is an accurate representation, but it does not follow that there is any such thing as the self' . Far from representing a form of `metaphysical excess' , the rejoinder seems faithfully and reliably phenomenological. We need (...) not assume that reflection is mere fabrication, or that it crucially distorts the thematic posit that funds our sense of self. The focus, recognition and contextual sensitivity that condition perception may, and admittedly do, limit and modify the activity of reflection as well. Observation disturbs the observed. And likewise, reflection may well compromise its object. But the product of this `compromise', the object as disturbed, the reflective posit as distorted, is nonetheless `there', for reflection. If the way a given object appears to us is a function of our perspectival insertion into the visible world, we need not deny that the world still appears to us in just this way. And analogously, our `sense of self' may represent -- in fact, faithfully represent -- the resultant `distortion', but it would be a breach of logic to infer from this that our `sense of self' therefore represents a self untouched by distortion, an independent, `undistorted' self. Indeed, if reflection distorts, we would have no reflective access to an undistorted self, and would thus have no phenomenological warrant for assuming its existence. Pace Strawson, however, the `something' represented by our `sense of self' is not some thing. It is not `as much a thing or object as any . . . grain of salt' , but rather, as we shall see, an atmospheric haze, or at best, an adventitious `sheen'. (shrink)

In her 2007 paper, “Argument Has No Function” Jean Goodwin takes exception with what she calls the “explicit function claims”, arguing that not only are function-based accounts of argumentation insufficiently motivated, but they fail to ground claims to normativity. In this paper I stake out the beginnings of a functionalist answer to Goodwin.

Geoff Goddu's 2010 paper "Is 'Argument' subject to the process/product ambiguity?" and Paul Simard-Smith and Andrei Moldovan's 2011 paper “Arguments as abstract objects” have revived the dialogue about what might be called the "metaphysics of argument". Both papers are important. Both also seem to me to be open to significant objections. In this paper I will lay out some of these objections and give, in rough outline, the kernel of an alternative approach.

In this dissertation I argue that the concept of a moral right is best explicated by means of the concept of morally legitimate coercion. This thesis, which I call the enforceability thesis, says that to have a right is to have a claim such that one would be justified in pursuing a course of action up to and including harm should the claim be dissatisfied. I contend that this thesis, if it is true, explains much about our intuitions concerning moral (...) rights, accounts for the historical importance of rights-talk in the context of events such as revolutions and political reforms, and explains why rights are a necessary part of the moral vocabulary. If rights do not set out conditions under which coercion is morally appropriate, then they do nothing that other moral concepts could not do. ;Drawing on the work of H. L. A. Hart, John Rawls, and others, I argue that the philosophical strength and practical efficacy of rights on the enforceability thesis is best realized when rights are treated as action-guiding principles set within a framework of moral decision making under reflective equilibrium. Using the process of reflective equilibrium as a backdrop, I argue that rights can have sufficient normative force to play an important role in moral and political theory without being either impracticably stringent or subject to so many exceptions that they lose their efficacy. ;With this background in place I next set out and argue for a view of human rights which, because human rights turn out to be best understood as rights to primary goods, I call the theory of primary rights. The account I give of primary rights emphasizes their justificatory place in arguments for coercion, their importance to the moral integrity of the individual, and the practical applicability of the overarching theory of rights developed in this dissertation. (shrink)

Abstract Buddhist egology concurs with the Husserlian claim that the enipirical ego is ?constituted?. The Buddhist ?deconstruction? of the ego will not, however, pace Husserl, permit the pronoun ?I? to refer to a purported extra?linguistic entity. The insights here distilled from the unique mode of self?reference functional within the Vietnamese language secure for us an unmistakable confirmation of the Buddhist thesis and have profound consequences for the philosophical problems surrounding the existence and nature of the self and the existence of (...) other minds. (shrink)

Sexual selection processes have received much attention in recent years, attention reflected in interest in human mate preferences. Among these mate preferences are preferences for physical attractiveness. Preferences in and of themselves, however, do not fully explain the nature of the relationships that individuals attain. A tacit negotiation process underlies relationship formation and maintenance. The notion that preferences for physical attractiveness evolved under parasite-driven “good genes” sexual selection leads to predictions about the nature of trade-offs that individuals make between mates’ (...) physical attractiveness and investment potential. These predictions and relevant data are explored, with a primary emphasis on women’s preferences for men’s qualities. In addition, further implications of trade-offs are examined, most notably (a) the impact of environmental variations on the nature of mating and (b) some effects of trade-offs on infidelity and male attempts to control women. (shrink)

To make behavioral choices that are in line with our goals and our moral beliefs, we need to gather and consider information about our current situation. Most information present in our environment is not relevant to the choices we need or would want to make and thus could interfere with our ability to behave in ways that reflect our underlying values. Certain sources of information could even lead us to make choices we later regret, and thus it would be beneficial (...) to be able to ignore that information. Our ability to exert successful self-governance depends on our ability to attend to sources of information that we deem important to our decision-making processes. We generally assume that, at any moment, we have the ability to choose what we pay attention to. However, recent research indicates that what we pay attention to is influenced by our prior experiences, including reward history and past successes and failures, even when we are not aware of this history. Even momentary distractions can cause us to miss or discount information that should have a greater influence on our decisions given our values. Such biases in attention thus raise questions about the degree to which the choices that we make may be poorly informed and not truly reflect our ability to otherwise exert self-governance. (shrink)

Wood, Kressel, Joshi, and Louie meta-analyzed studies examining changes in women’s mate preferences as a function of cycle phase, and claimed to find little evidence for shifts, contrary to Gildersleeve, Haselton, and Fales’s meta-analysis. This commentary concerns specific speculations Wood et al. made about particular researchers analyzing data multiple ways, capitalizing on chance and thereby inflating the Type I error rate. In so doing, Wood et al. misconstrued a key article explaining the high fertility period, misrepresented studies, and presented no (...) supportive evidence. The corrosive effects of inappropriate research practices on scientific literatures are concerning. So too are unsubstantiated speculations of them. (shrink)