Contemporary experimental research has emphasised the role of centrally generated signals arising from premotor areas in voluntary muscular force perception. It is therefore generally accepted that judgements of force are based on a central sense, known as the sense of effort, rather than on a sense of intra-muscular tension. Interestingly, the concept of effort is also present in the classical philosophy: to the French philosopher Maine de Biran [Maine de Biran . Mémoire sur la décomposition de la pensée (...) , Vrin, Paris ], the sense of effort is the fundamental component of self-experience, the landmark of the exercise of the will. In the present review, after a presentation of the nature and neurophysiological bases of effort sensation, we will examine its possible involvement in the neurocognitive process of agency. We will further focus on delusions of alien control in schizophrenic patients. Experimental data suggest that these patients have an abnormal awareness of effort caused by cerebral anomalies in the frontal and parietal lobes. (shrink)

A great deal of effort has been, and continues to be, devoted to developing consciousness artificially (A small selection of the many authors writing in this area includes: Cotterill (J Conscious Stud 2:290–311, 1995 , 1998 ), Haikonen ( 2003 ), Aleksander and Dunmall (J Conscious Stud 10:7–18, 2003 ), Sloman ( 2004 , 2005 ), Aleksander ( 2005 ), Holland and Knight ( 2006 ), and Chella and Manzotti ( 2007 )), and yet a similar amount of effort has (...) gone in to demonstrating the infeasibility of the whole enterprise (Most notably: Dreyfus ( 1972/1979 , 1992 , 1998 ), Searle ( 1980 ), Harnad (J Conscious Stud 10:67–75, 2003 ), and Sternberg ( 2007 ), but there are a great many others). My concern in this paper is to steer some navigable channel between the two positions, laying out the necessary pre-conditions for consciousness in an artificial system, and concentrating on what needs to hold for the system to perform as a human being or other phenomenally conscious agent in an intersubjectively-demanding social and moral environment. By adopting a thick notion of embodiment—one that is bound up with the concepts of the lived body and autopoiesis (Maturana and Varela 1980 ; Varela et al. 2003 ; and Ziemke 2003 , 2007a , J Conscious Stud 14(7):167–179, 2007b )—I will argue that machine phenomenology is only possible within an embodied distributed system that possesses a richly affective musculature and a nervous system such that it can, through action and repetition, develop its tactile-kinaesthetic memory, individual kinaesthetic melodies pertaining to habitual practices, and an anticipatory enactive kinaesthetic imagination. Without these capacities the system would remain unconscious, unaware of itself embodied within a world. Finally, and following on from Damasio’s ( 1991 , 1994 , 1999 , 2003 ) claims for the necessity of pre-reflective conscious, emotional, bodily responses for the development of an organism’s core and extended consciousness, I will argue that without these capacities any agent would be incapable of developing the sorts of somatic markers or saliency tags that enable affective reactions, and which are indispensable for effective decision-making and subsequent survival. My position, as presented here, remains agnostic about whether or not the creation of artificial consciousness is an attainable goal. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:Dewey and the Aesthetic Unconscious: The Vital Depths of Experience by Bethany HenningPentti MäättänenBethany Henning Dewey and the Aesthetic Unconscious: The Vital Depths of Experience London: Lexington Books, 2022. 182 pp. incl. indexBethany Henning examines Dewey's conception of aesthetic experience by looking for connections to several trends and traditions. Henning relates pragmatism to Freudian psychoanalysis, feminism, wisdom from esoteric sources, erotic drive, and religion. "In the American thought (...) that we have surveyed thus far, the aesthetic, the religious, and the ethical stand as completions and realizations of one another" (p. 25). This variety of viewpoints is no doubt interesting and potentially fruitful, but there is a danger that the result may remain somewhat sporadic.One of the traditional problems and tasks in philosophy is to explain how the world is experienced as an organized, bounded whole. How are the various sensations and ideas of them related to each other? On what ground can we experience these relations between ideas? Henning refers to William James and says that these relations are directly experienced, we feel them (p. 46). According to Henning there is a unique force responsible for this, and it "can only be a kind of noncognitive, preverbal awareness, and for Dewey, it can only be the qualitative immediacy that is known to us only in aesthetic experience" (p. 25). How can we experience these relations? Here Henning appeals to Jonathan Edwards (1703–1758) who provided his own view of habits, which account for "the relations between ideas by relating them through their spatiotemporal contiguity, causality, or through resemblances" (p. 21; italics in the original). This is how the American mind was firmly set on a theoretical path that distinguishes it from "the European conception" (ibid.).This is a surprising claim, indeed. Here is what David Hume has to say about the connexion or association of ideas: "The qualities, from [End Page 369] which this association arises, and by which the mind is after this manner convey'd from one idea to another, are three, viz. RESEMBLANCE, CONTIGUITY in time or place, and CAUSE and EFFECT."1 It is quite inconceivable how this simple relabeling of Hume's principles of association as habits might have any effect on any theoretical path, especially on the emergence of pragmatism. Edwards wrote decades before Charles Peirce entered the scene. Edwards' habit is just a new name for old European ideas. It is obvious that Hume's principles of association, which deal with internal mental processes, have not much to do with Peircean habits of action, which are about overt bodily action in the world where we meet also hard facts involving brute force, muscular effort, and resistance.The starting point of Henning's analysis is immediate qualitative experience, affective sensual awareness, which also prefigures and is the ground of signification (p. 107). Qualitative immediacy is felt, had, and undergone. There is a need to experience the world as meaningful, to move from that world as had and undergone to the world as known. Knowledge about this immediate experience becomes possible with the emergence of mind, when "situations, in their qualitative tone, are also socially significant so that interactions are aided by the mediation of symbols" (p. 88). We can give names to qualitatively different feelings. This knowledge is different from qualitative immediacy in that it is discursive, cognitive, and syntactical (p. 38). But how does this kind of knowledge emerge? What is the origin of names and symbols? What is the notion of meaning applied here? According to Henning, meaning "must be felt, had and undergone, in a way that is primarily qualitative rather than primarily cognitive" (p. 107). There is also "erotic need for meaningful connection" (p. 113). Further, Henning appeals to Julia Kristeva's semiotic theory, but Peirce's semiotics is not mentioned. An explicit definition of meaning would be in place here, especially as Peirce and Dewey have one to offer.According to Peirce, "what a thing means is simply what habits it involves" (CP 5.400).2 Note that there are no restrictions on this. If it is a linguistic expression, then we have Ludwig Wittgenstein's language games... (shrink)

RationaleThere are growing concerns over the occurrence of adverse physiologic events occurring in pilots during operation of United States Air Force and Navy high-performance aircraft. We hypothesize that a heightened inspiratory work of breathing experienced by jet pilots by virtue of the on-board life support system may constitute a “distraction stimulus” consequent to an increased sensation of respiratory muscle effort. As such, the purpose of this study was to determine whether increasing inspiratory muscle effort adversely impacts on attentional performance.MethodsTwelve, healthy (...) participants were recruited for this study. Participants completed six repetitions of a modified Masked Conjunctive Continuous Performance Task protocol while breathing against four different inspiratory threshold loads to assess median reaction times. A computer-controlled threshold loading device was used to set the inspiratory threshold loads. Repeated measures analysis of variances were performed to examine: the efficacy of the threshold loading device to impose significantly higher loading at each loading condition; the effects of loading condition on respiratory muscle effort sensation; and the influence of hypercapnia on MCCPT scores during inspiratory threshold loading. Generalized additive mixed effects models were used to examine the potential non-linear effects of respiratory muscular effort sensation, device loading, and hypercapnia, on MCCPT scores during inspiratory threshold loading.ResultsInspiratory threshold loading significantly augmented inspiratory effort sensation and the inspiratory pressure-time product. Our analyses also revealed that median hit RT was positively associated with inspiratory effort sensation during inspiratory loading trials.ConclusionThe findings of this work suggest that it was not increasing inspiratory muscle effort per se, but rather participant’s subjective perception of inspiratory “load” that impacts negatively on attentional performance; i.e., as the degree of inspiratory effort sensation increased, sotoo did median hit RT. As such, it is reasonable to suggest that minimizing inspiratory effort sensation during high-performance flight operations may prove useful in reducing pilot RTs during complex behavioral tasks. (shrink)

In resistance training, the use of predicting proximity to momentary task failure, and repetitions in reserve scales specifically, is a growing approach to monitoring and controlling effort. However, its validity is reliant upon accuracy in the ability to predict MF which may be affected by congruence of the perception of effort compared with the actual effort required. The present study examined participants with at least 1 year of resistance training experience predicting their proximity to MF in two different experiments using (...) a deception design. Within each experiment participants performed four trials of knee extensions with single sets to their self-determined repetition maximum and MF. For the first experiment participants used loads equal to 70% of a one repetition maximum performed in a separate baseline session. Aiming to minimize participants between day variability in repetition performances, in the second separate experiment they used loads equal to 70% of their daily isometric maximum voluntary contraction. Results suggested that participants typically under predicted the number of repetitions they could perform to MF with a meta-analytic estimate across experiments of 2.0 [95%CIs 0.0 to 4.0]. Participants with at least 1 year of resistance training experience are likely not adequately accurate at gauging effort in submaximal conditions. This suggests that perceptions of effort during resistance training task performance may not be congruent with the actual effort required. This has implications for controlling, programming, and manipulating the actual effort in resistance training and potentially on the magnitude of desired adaptations such as improvements in muscular hypertrophy and strength. (shrink)

The term ‘locked-in’ syndrome (LIS) describes a medical condition in which persons concerned are severely paralyzed and at the same time fully conscious and awake. The resulting anarthria makes it impossible for these patients to naturally communicate, which results in diagnostic as well as serious practical and ethical problems. Therefore, developing alternative, muscle-independent communication means is of prime importance. Such communication means can be realized via brain–computer interfaces (BCIs) circumventing the muscular system by using brain signals associated with preserved (...) cognitive, sensory, and emotional brain functions. Primarily, BCIs based on electrophysiological measures have been developed and applied with remarkable success. Recently, also blood flow–based neuroimaging methods, such as functional magnetic resonance imaging (fMRI) and functional near-infrared spectroscopy (fNIRS), have been explored in this context. After reviewing recent literature on the development of especially hemodynamically based BCIs, we introduce a highly reliable and easy-to-apply communication procedure that enables untrained participants to motor-independently and relatively effortlessly answer multiple-choice questions based on intentionally generated single-trial fMRI signals that can be decoded online. Our technique takes advantage of the participants’ capability to voluntarily influence certain spatio-temporal aspects of the blood oxygenation level–dependent (BOLD) signal: source location (by using different mental tasks), signal onset and offset. We show that healthy participants are capable of hemodynamically encoding at least four distinct information units on a single-trial level without extensive pretraining and with little effort. Moreover, realtime data analysis based on simple multi-filter correlations allows for automated answer decoding with a high accuracy (94.9%) demonstrating the robustness of the presented method.. (shrink)

Touch seems to enjoy some epistemic advantage over the other senses when it comes to attest to the reality of external objects. The question is not whether only what appears in tactile experiences is real. It is that only whether appears in tactile experiences feels real to the subject. In this chapter we first clarify how exactly the rather vague idea of an epistemic advantage of touch over the other senses should be interpreted. We then defend a “muscular thesis”, (...) to the effect that only the experience of resistance to our motor efforts, as it arises in effortful touch, presents us with the independent existence of some causally empowered object. We finally consider whether this muscular thesis applies to the perception of our own body. (shrink)

Psychology does not get rid of its problems by taking experience at its face value, for it is the province of psychology to study problems arising when experience is taken at its face value. Only in actual lived experience is concrete reality to be found in its fullest sense. All reality which is experience includes attributes both spatial and temporal. Objects cannot b7 considered in the first place apart from such attributes. Physical objects are perceived as parts of a total (...) situation and there is merit in the suggestion of the Gestalt psychologists. Always much will be found in the perceptum which will not correspond with the physical object, since the physical object is only an abstract. The effort to control our environment has led to a sophisticated attitude toward perceptual experience, which is said in psychological circles to lead to the stimulus error. Those who have seen children gradually grow into a realization of the unreliability of perception—for purposes of muscular manipulation—will understand what is meant. (PsycINFO Database Record (c) 2009 APA, all rights reserved). (shrink)

In lieu of an abstract, here is a brief excerpt of the content:What Power Do I Have? A Nursing Student’s Concerns Lead to a Passion for EthicsAnonymous OneThe day began like many in our ten–week rotation, around the large table in the brightly lit ICCU nurses’ station. Report, which was given by the night charge nurse, included information on all the patients on the unit. Since I had cared for A. G. the previous day, I was eager to know how (...) she had spent the night. She had a debilitating neuro–muscular disease known as myasthenia gravis. Placed on the ventilator days before, it was reported that she was likely to be dependent on the machine for life. In the late 1970’s there were very few facilities that accepted ventilator dependent patients. She might be with us for a long time.When I entered her room for the first time, I saw a frail older woman with kind eyes and a warm smile. She was breathing with the help of the ventilator through her tracheostomy tube. I learned through her chart that she had no known family. On the day I took care of her, no one came to see her and she had no visitors the previous evening. She lived in a local long–term care facility and was brought to the hospital after she developed respiratory distress. A. G. was unable to move in the bed due to her condition and required frequent suctioning along with turning and repositioning for comfort.Despite her weakness, A. G. was able to communicate silently by mouthing the words for what she wanted and by nodding and shaking her head. I found her to be quite skilled in non–verbal [End Page 93] communication since it took minimal effort to understand what she wanted, but the activity tired her easily. I had just completed A. G.’s morning care when her physician came in to examine her. After completing his assessment, he stopped and leaned in closely to speak with her. He began asking a number of questions about whether she wanted to spend the rest of her life in this way, on a ventilator. She shook her head. Continuing the line of questioning in different ways, she responded to him. I wondered why he was asking these questions. After seeing her response, the physician asked me to get 30 mg of morphine from the narcotics cabinet. Although I didn’t understand the implication of the request, I complied.While I was retrieving the medication from the narcotics cabinet, the charge nurse came to tell me I was being reassigned to a new admission. When I asked why, she told me she couldn’t discuss it, but asked me to please do what she said. I left her standing there, wondering what was going on. After assisting with the new admission, I went back to see A.G.; her door was closed. When I opened the door, the ventilator tubing hung over the side of the machine. Looking down at the bed, I was shocked to find A.G. had been disconnected. She was dead. In a state of disbelief and panic, I sought out the charge nurse to find out what happened. It was clear that I was not to know. I asked her a number of questions but she adeptly changed the subject and redirected me to other activities. By then it was lunchtime and my instructor had left the unit. I asked to be excused and went to seek her out.When I told my instructor what happened, a look of doubt came over her face. “You think Doctor M. killed your patient? That would never happen.” Although I tried to tell her the story, she too, dismissed me, telling me my story didn’t make sense. I was distraught. An overwhelming sense of dread came over me and I began to cry. She encouraged me to go home, which I did.Happily, I had the weekend to recover before returning to clinical. I never found out what happened to A. G. and neither my instructor nor the charge nurse ever spoke to me about my experience. In fact, it seemed no one believed my story... (shrink)

Burnshaw treats virtually every aspect of poetry, but devotes a major theoretical effort to developing a biologically grounded explanation of both creation and the esthetic experience. He extends his theory of creation to every art form, including the fabrication of scientific theories; the rest of the study is devoted exclusively to poetry. Burnshaw claims to be following the lead of John Keble, who described poetry as that which "acts as a safety valve to a full mind." He supports his homeostatic (...) theory with numerous statements by creative persons about their psycho-physiological state at the time of inspiration. Burnshaw wisely limits his theory of creation to those works which seem to be truly inspired, which "demand" to be born; nevertheless, his method tends toward the pseudo-scientific. He too facilely converts the terms of the poet's auto-description into supposed physicalist counterparts. In like manner, the esthetic experience is reduced to the communication of an internal metaphor which constitutes the "true" poem, where this internal metaphor is the expression, through the affective structures of the poem, of the poet's inner bodily movements at the time of creation. The reader, because of changes in his muscular, circulatory, and respiratory systems, comes to "reverberate" with the internal metaphor. Fortunately, Burnshaw doesn't get too caught up in such theories. In the second section of the book, for example, he goes beyond reductionistic explanations and discusses the act of creation in teleological terms; poetry becomes a primal language, which, in symbolically restoring the true sensuality of all things, overcomes alienation and reunites both poet and reader in themselves, with each other, and with the rest of the universe. The book contains a wealth of biological, anthropological, zoological, and psychological information and ideas, plus some very penetrating analyses of different poems in an explicitly rhetorical and implicitly metaphysical framework.--C. M. R. (shrink)

A phenomenological model is developed as an alternative to current analyses of the imagination in sport philosophy, heirs to an Enlightenment notion that conceptualizes imaginings as abstract, eidetic, and representational. EC describes how Eidetic and Corporeal Imaginings phenomenologically structure our imaginative undertakings. EIs keep the ‘ideal’ aspect, but CIs—enacted, corporeal, non-representational—are more fundamental and foundational. Sports are particularly suited to express CIs’ muscular imaginings, which result in novel performances. An enactive framework theorizes CIs as non-representational interactions.

A phenomenological model is developed as an alternative to current analyses of the imagination in sport philosophy, heirs to an Enlightenment notion that conceptualizes imaginings as abstract, eidetic, and representational. EC describes how Eidetic and Corporeal Imaginings phenomenologically structure our imaginative undertakings. EIs keep the ‘ideal’ aspect, but CIs—enacted, corporeal, non-representational—are more fundamental and foundational. Sports are particularly suited to express CIs’ muscular imaginings, which result in novel performances. An enactive framework theorizes CIs as non-representational interactions.

Muscular dystrophies are associated with mutations in genes encoding several classes of proteins. These range from extracellular matrix and integral membrane proteins to cytoskeletal proteins, but also include a heterogeneous group of proteins including proteases, nuclear proteins, and signalling molecules. Muscular dystrophy phenotypes have also become evident in studies on various knockout mice defective in proteins not previously considered or known to be mutated in muscular dystrophies. Some unifying themes are beginning to emerge from all of these (...) data. This review will consider recent advances in our understanding of the molecules involved and bring together data that suggest a role for the cytoskeleton and cell adhesion in muscular dystrophies. BioEssays 24:542–552, 2002. © 2002 Wiley Periodicals, Inc. (shrink)

A survey of members of the Japan Muscular Dystrophy Association , including patients and families, was conducted in October 1995. Some of the same questions that were included in a 1992 survey were included to allow comparisons. During the 1994 Annual Meeting in Kyoto a special session on fetal diagnosis and bioethics was included, attended by over 500 persons, which may have been a cause for increased awareness of genetic diagnosis seen in this survey. 60% of patients and 71% (...) of families said they would receive fetal diagnosis. 10% of patients and 24% of families could remember DNA diagnosis of themselves, and most had some type of consent or information. (shrink)

Although the precise function of utrophin at the postsynaptic membrane of the neuromuscular junction still remains unclear, despite recent genetic ‘knockout’ experiments(1,2), a separate study in a transgenic mouse model system for Duchenne muscular dystrophy (DMD) has nonetheless shown that overexpression of utrophin into extrasynaptic regions of muscle fibers can functionally compensate for the lack of dystrophin and alleviate the muscle pathology(3). In this context, the next step is to identify the mechanisms presiding over expression of utrophin at the (...) neuromuscular synapse in attempts to induce its expression throughout DMD muscle fibers. In fact, additional studies have shown that an important DNA element contained with the utrophin promoter may confer synapse‐specific expression to the utrophin gene(4,5). Identification of the events culminating in the transaction of the utrophin gene within synaptic myonuclei should provide important cues for the development of an effective therapeutic strategy for DMD. (shrink)

RESUMEN El presente texto es el resultado de un estudio dirigido a demostrar la importancia del sistema muscular en mujeres operadas de cáncer de mama, enfermedad con elevada incidencia en Cuba y el mundo. Se investigó en los principales reportes anatómicos. Se partió de la revisión documental de textos básicos para la carrera de Medicina inherentes a la asignatura Anatomía Humana. Se corroboró que autores como M. Prives, N Lisenkov y V Bushkovich y R. D. Sinelnikov; describen los músculos, (...) pero no relatan su importancia en la práctica quirúrgica. Se emplearon los buscadores en Internet y otros sitios webs de información científica, que permitieron corroborar desde un enfoque de ciencia, tecnología y sociedad la importancia del tejido muscular y su aplicación en técnicas reconstructivas en pacientes operadas de cáncer de mama. Se constató que los músculos más usados son los rectos abdominales, los dorsales anchos, los gráciles y el tejido adiposo del pliegue glúteo. ABSTRACT The present text is the result of a study directed to demonstrate the importance of the muscular system in women who had a surgery on breast cancer, illness with high incidence in Cuba and the world. It was investigated in the principal anatomical reports. It began with the documentary review of basic texts for the career of Medicine inherent to the subject Human Anatomy. It was corroborated that authors like M. Prives, N Lisenkov and V Bushkovich and R. D. Sinelnikov; they describe the muscles, but they do not report their importance in surgical practice. It was used the searche engines on Internet and other web sites of scientific information, which allowed to corroborate from an approach of science, technology and society the importance of the muscular tissue andits application in reconstructive techniques in patients who undergoa breast cancer surgery. It was stated that the most used muscles are the abdominal rectus, the latissimusdorsi, the graceful ones and the adipose tissue of the gluteus fold. (shrink)

The aim of this study was to evaluate the neuromuscular response to an agility and repeated sprint ability test according to the level of competition in futsal players. A total of 33 players from two elite teams and one amateur team participated in the study. The participants completed an agility t-test, a 30 m-speed test, and a RSA test. A countermovement jump test and a tensiomyography test of the rectus femoris and biceps femoris of both legs were carried out before (...) and after the tests. RSA test revealed better sprint times in elite players compared to amateurs in the seven bouts, as well as in the 30 m sprint and in the agility test. In conclusion, elite players showed greater performance in the RSA test, in the 30 m tests and in the agility test compared to amateur players. The contractile properties were not a key factor in the RSA performance of the futsal players. (shrink)

The rise of chauvinist, bigoted and sectarian politics in India coincided with the critique and blanket dismissal of modern science by some Indian intellectuals. The elective affinities between these two developments and the larger global intellectual and politial context have been analyzed in great detail by Meera Nanda. This paper provides a critical examination and appreciation of the enormous intellectual and political significance of Nanda's work.

The hereditary neurodegenerative disease spinal muscular atrophy (SMA) with childhood onset is one of the most common genetic causes of infant mortality. The disease is characterized by selective loss of spinal cord motor neurons leading to muscle atrophy and is the result of mutations in the survival motor neuron (SMN) gene. The SMN protein has been implicated in diverse nuclear processes including splicing, ribosome formation and gene transcription. Even though the genetic basis of SMA is well understood, it is (...) not clear how defects in these ubiquitous processes result in motor neuron degeneration leaving other tissues unaffected. Recent evidence from animal and cell culture models of SMA points to roles for SMN in neurite outgrowth and axonal transport. Disruption of these functions might be particularly detrimental to motor neurons given their high metabolic demands and precise connectivity requirements, thus providing a possible explanation for the specificity of motor neuron susceptibility in SMA. Understanding the molecular mechanisms of SMN activity in neuronal processes may generate new targets for future therapeutic strategies. BioEssays 27:946–957, 2005. © 2005 Wiley Periodicals, Inc. (shrink)

We consider Effort Games, a game-theoretic model of cooperation in open environments, which is a variant of the principal-agent problem from economic theory. In our multiagent domain, a common project depends on various tasks; carrying out certain subsets of the tasks completes the project successfully, while carrying out other subsets does not. The probability of carrying out a task is higher when the agent in charge of it exerts effort, at a certain cost for that agent. A central authority, called (...) the principal, attempts to incentivize agents to exert effort, but can only reward agents based on the success of the entire project.We model this domain as a normal form game, where the payoffs for each strategy profile are defined based on the different probabilities of carrying out each task and on the boolean function that defines which task subsets complete the project, and which do not. We view this boolean function as a simple coalitional game, and call this game the underlying coalitional game. We suggest the Price of Myopia as a measure of the influence the model of rationality has on the minimal payments the principal has to make in order to motivate the agents in such a domain to exert effort.We consider the computational complexity of testing whether exerting effort is a dominant strategy for an agent, and of finding a reward strategy for this domain, using either a dominant strategy equilibrium or using iterated elimination of dominated strategies. We show these problems are generally #P-hard, and that they are at least as computationally hard as calculating the Banzhaf power index in the underlying coalitional game. We also show that in a certain restricted domain, where the underlying coalitional game is a weighted voting game with certain properties, it is possible to solve all of the above problems in polynomial time. We give bounds on PoM in weighted voting effort games, and provide simulation results regarding PoM in another restricted class of effort games, namely effort games played over Series-Parallel Graphs. (shrink)

Serena Olsaretti brings together new essays by leading moral and political philosophers on the nature of desert and justice, their relations with each other and with other values.

Achievements have recently begun to attract increased attention from value theorists. One recurring idea in this budding literature is that one important factor determining the magnitude or value of an achievement is the amount of effort the achiever invested. The aim of this paper is to present the most plausible version of this idea. This advances the current state of debate where authors are invoking substantially different notions of effort and are thus talking past each other. While the concept of (...) effort has been invoked in the philosophical analysis of a number of important concepts such as desert, attention, competence, and distributive justice, it has hardly ever been analyzed itself. This paper makes headway in this regard by discussing three ambiguities in the everyday notion of effort. It continues to develop two accounts of effort and shows how both of them are achievement-enhancing. (shrink)