The ‘impairment argument’ against abortion developed by Perry Hendricks aims to derive the wrongness of abortion from the wrongness of causing foetal alcohol syndrome. Hendricks endorses an ‘impairment principle’, which states that, if it is wrong to inflict an impairment of a certain degree on an organism, then, ceteris paribus, it is also wrong to inflict a more severe impairment on that organism. Causing FAS is wrong in virtue of the impairment it inflicts. But abortion inflicts an even more severe (...) impairment, and so, ceteris paribus, is also wrong. Notably, Hendricks thinks that this argument does not require the claim that the foetus is a person. Here, I respond to Hendricks by arguing that the ceteris paribus clause of the impairment principle is not met in ordinary cases of pregnancy. Carrying an unwanted pregnancy to term is much more burdensome than is refraining from excessive drinking for nine months. This provides a pro tanto justification for obtaining an abortion that does not apply to causing FAS. If the foetus is not a person, it seems fairly clear to me that this justification is strong enough to render abortion permissible. Hendricks is therefore incorrect in claiming that the impairment argument can go without claims concerning foetal personhood. If the foetus is a person, then whether burdensomeness justifies abortion depends on certain questions relating to Thomson’s famous violinist argument. I will not attempt to answer those. But anyone who is otherwise sympathetic to Thomson’s argument should not be moved by the impairment argument. (shrink)

Analogies are the stuff out of which normative moral philosophy is made. Certainly one of the most famous analogies constructed by a philosopher in order to argue for a specific controversial moral conclusion is the one involving Judith Thomson's unconscious violinist. Reflection upon this analogy is meant to show us that abortion is generally not immoral even if the prenatal have the same moral status as the postnatal. This was and still is a controversial conclusion, and yet the analogy (...) does seem to reveal in a very vivid way what makes abortion a reasonable response to a terrible situation. But Thomson's example has frequently been attacked on all sides for not being truly analogous to abortion. Here I develop a brand new analogy that sheds light on the issue with which Thomson was concerned, while at the same time avoiding most of the more serious objections made to her analogy. (shrink)

In this paper I take a critical look at Judith Jarvis Thomson famous violinist analogy for abortion. I argue that while the violinist example does show that a right to life does not entail a right to be given the means of life, the violinist cast is relevantly different from the pregnancy case. I also argue that Thomson's positive argument in favor of the permissibility of abortion fails because it is based on a false conception of bodily (...) self-ownsership. Finally, I offer an argument against abortion built not on the child's rights, but the mother's obligation to the vulnerable. (shrink)

Re-Reading: Judith Jarvis Thompson, 'A Defense of Abortion'.

Critique of J.J. Thomson's well-known defense of abortion. Tries to show that Thomson is wrong that abortion is a violation of the fetus's right to life because there is an important difference between the way the fetus is dependent on the pregnant woman and the way the patient is dependent on the violinist.

It is commonly taken for granted that abortion is necessarily impermissible if the fetus is a person with a right to life. In her influential essay Judith Jarvis Thomson offers what I will call the violinist example to show that merely having a right to life does not in and of itself give rise in the fetus to a right to use the mother's body. On Thomson's view, if the fetus has a right to use the mother's body that (...) precludes terminating its life by means of an abortion, it is because the mother did something to give the fetus that right. Thus she concludes that the proposition that the fetus is a person does not imply that abortion is morally impermissible. (shrink)

Judith Jarvis Thomson famously argued that abortion is permissible even if we accept that a fetus qualifies as a person and possesses a right to life. The current paper presents two arguments that undermine Thomson’s position. First, the paper sketches a contractarian argument that explores Thomson’s violinist thought experiment from behind a veil of ignorance, which suggests that if we had an equal likelihood of being an unwanted fetus and a pregnant woman, it would be rational for us to (...) oppose abortion. Second, the paper discusses the hypothetical self-aborting fetus, a thought experiment that reverses the dependence relationship between a woman and a fetus. It is argued that in this scenario, where fetuses have agency of their own, Thomson’s position would counterintuitively prohibit a woman from temporarily curtailing the freedom of her fetus even to save her own life. (shrink)

Michal Pruski and Richard C. Playford argue that if partial ectogenesis technology becomes available then it would undermine Judith Jarvis Thomson’s defense of abortion. Thomson argues that even if a fetus has a right to life, this is not a positive right to be given whatever one needs to survive; it is not a right to use the mother’s body or to risk her life without her permission. Pruski and Playford argue that when the risks involved in ectogenesis are comparable (...) to those of abortion, then minimal decency requires gestational mothers to opt for ectogenesis over abortion. This argument hinges on egregious misunderstandings of (1) ectogenesis technology, (2) medical and surgical abortion, and (3) medical consent. (shrink)

In this paper, I urge feminists to re-center fetal moral status in their theorizing about abortion. I argue that fundamental feminist normative commitments are at odds with efforts to de-emphasize fetal moral status: The feminist commitment to ensuring care for dependents supports surprising conclusions with regard to the ethics of abortion, and the feminist commitment to politicizing the personal has surprising conclusions regarding the politics of abortion. But these feminist insights also support the conclusion that, conditional on fetal moral status, (...) care for unwanted fetuses would be a social obligation that only derivatively falls to women who are unwillingly pregnant. (shrink)

In the aftermath of the Kermit Gosnell trial and Giubilini and Minerva's article ‘After-birth abortion’, abortion-rights advocates have been pressured to provide an account of the moral difference between abortion, particularly late-term abortion, and infanticide. In response, some scholars have defended a moral distinction by appealing to an argument developed by Judith Jarvis Thomson in A defense of abortion. However, once Thomson's analogy is refined to account for the morally relevant features of late-term pregnancy, rather than distinguishing between late-term abortion (...) and infanticide, it reinforces their moral similarity. This is because late-term abortion requires more than detachment – it requires an act of feticide to ensure the death of the viable fetus. As such, a Thomsonian account cannot be deployed successfully as a response to Giubilini and Minerva. Those wishing to defend late-term abortion while rejecting the permissibility of infanticide will need to provide an alternative account of the difference, or else accept Giubilini and Minerva's conclusion. (shrink)

In the aftermath of the Kermit Gosnell trial and Giubilini and Minerva's article ‘After-birth abortion’, abortion-rights advocates have been pressured to provide an account of the moral difference between abortion, particularly late-term abortion, and infanticide. In response, some scholars have defended a moral distinction by appealing to an argument developed by Judith Jarvis Thomson in A defense of abortion. However, once Thomson's analogy is refined to account for the morally relevant features of late-term pregnancy, rather than distinguishing between late-term abortion (...) and infanticide, it reinforces their moral similarity. This is because late-term abortion requires more than detachment – it requires an act of feticide to ensure the death of the viable fetus. As such, a Thomsonian account cannot be deployed successfully as a response to Giubilini and Minerva. Those wishing to defend late-term abortion while rejecting the permissibility of infanticide will need to provide an alternative account of the difference, or else accept Giubilini and Minerva's conclusion. (shrink)

A virtual reality translation of Judith Thomson's Violinist Analogy. These modules are free to download and use in the classroom and for research/x-phi purposes. -/- *Requires an Oculus Rift or HTC Vive and VR capable computer. To open the files, uncompress the downloaded .zip folder and run the executable (.exe) file.

The scope of embryo research in the UK has been expanded by the Human Fertilisation and Embryology Regulations 2001. Two advisory bodies—the Chief Medical Officer’s Expert Group and the House of Lords’ Select Committee—presented various arguments in favour of embryo research. One of these is the view that, just as lottery tickets have relatively little value before the draw because of the low probability of their being the winning ticket, early embryos have relatively little value because of the presumed low (...) probability that they will mature into more developed embryos. This argument from probability is questioned in this paper, as well as the contention that allowing embryo destruction is incompatible with the view that embryos have full moral status. Although I challenge Savulescu’s view that early embryos should be entered into a lottery in which they are subjected to the probability of being destroyed , a revised version of Thomson’s analogy of the famous violinist defies the view that the position that the embryo has full moral status is incompatible with qualified support for embryo destruction. (shrink)

This chapter contains section titled: Discussion.

Little is known about how bow mechanical characteristics objectively and quantitatively influence violinists' preferences and performance. Hypothesizing that the bow shape and mass distribution modifications would alter both violinists' appreciations of a bow and objective assessments of their performance, we recruited 10 professional violinists to play their own violin using 18 versions of a single bow, modified by combining three cambers and six mass distributions, in random order. A musical phrase, composed for this study, was played legato and spiccato at (...) three octaves and two tempi. Each violinist scored all 18 bows. Then, experts assessed the recorded performances according to criteria inspired by basic musical analysis. Finally, 12 audio-descriptors were calculated on the same note from each trial, to objectivise potential acoustic differences. Statistical analysis reveals that bow camber impacted the violinists' appreciations, and that heavier bow tips gave lower scores for spiccato playing. The expert evaluations reveal that playing with a lighter bow, or with a bow whose camber's maximum curvature is close to the frog, had a positive impact on some violinists' performance. The “camber-participant” interaction had significant effects on the violinists' appreciations, on the expert's evaluation and on almost all the audio-descriptors. While trends were identified, multiple camber-participant interactions suggest that bow makers should provide a variety of cambers to satisfy different violinists. (shrink)

The point of Judith Jarvis Thomson's violinist example is to establish that one person, A, can acquire a right to use the body of another person, B, if and only if B performs some kind of affirmative act that gives A such a right. On her view, the reason it is permissible for you to unplug yourself from the violinist is that you did nothing to give the violinist a right to use your body: the violinist (...) was plugged into you without your consent. Thus it follows that the mere fact that A needs use of B's body to survive is not enough to give rise to a right in A to use B's body. Accordingly, Thomson concludes, the claim that the fetus has a right to life does not imply abortion is morally impermissible. (shrink)

The point of Judith Jarvis Thomson's violinist example is to establish that one person, A, can acquire a right to use the body of another person, B, if and only if B performs some kind of affirmative act that gives A such a right. On her view, the reason it is permissible for you to unplug yourself from the violinist is that you did nothing to give the violinist a right to use your body: the violinist (...) was plugged into you without your consent. Thus it follows that the mere fact that A needs use of B's body to survive is not enough to give rise to a right in A to use B's body. Accordingly, Thomson concludes, the claim that the fetus has a right to life does not imply abortion is morally impermissible. (shrink)

The debate concerning abortion abounds in miraculous narratives. Judith Jarvis Thomson has contrived the most celebrated set among related ones, to wit the “violinist analogy,” the “Good Samaritan” narrative, and the “Henry Fonda” allegory, by virtue of which, she intends, on the one hand, to argue that women’s right to autonomy outweighs the alleged fetus’s right to life, and on the other, to prove that no positive moral duties can be derived towards other persons alone from the fact that (...) a moral agent is ascribed certain rights. What this short paper endeavors to prove is that Thomson’s argumentation by analogy is a weak one, since neither the number nor the relevance of similarities invoked is adequate or satisfactory, while crucial parameters concerning the morality of abortion are being totally overlooked. (shrink)

I explore two thought-experiments in Judith Jarvis Thomson’s important article, “A Defense of Abortion”: the violinist example and the people-seeds example. I argue (contra Thomson) that you have a moral duty not to unplug yourself from the violinist and also a moral duty not to destroy a people-seed that has landed in your sofa. Nevertheless, I also argue that there are crucial differences between the thought-experiments and the contexts of pregnancy due to rape or to contraceptive failure. In (...) virtue of these differences, it would not follow from my conclusions about the violinist and people-seeds cases that abortion would not be permissible in a case of rape or in a case of voluntary intercourse with contraceptive failure. (shrink)

One of the most influential philosophical arguments in favour of the permissibility of abortion is Judith Jarvis Thomson’s violinist analogy, presented in ‘A Defense of Abortion’. Its appeal for pro-choice advocates lies in Thomson’s granting that the fetus is a person with equivalent moral status to any other human being, and yet demonstrating—to those who accept her reasoning—that abortion is still permissible. In her argument, Thomson draws heavily on the parable of the Good Samaritan, arguing that gestating a fetus (...) in some circumstances is what she calls a Good Samaritan act, and claiming that we are not morally required to be Good Samaritans. Here, I argue that Thomson has subverted the parable to justify an action that is the antithesis of its meaning. I contend that Christians are required to be Good Samaritans, and explain that for Christians, this entails abortion is impermissible in all circumstances. Further, I argue that the parable shows the fetus is our neighbour in need of our mercy and assistance, and consequently Christians should be actively involved in helping to ensure the unborn are protected, whether they are fetuses in danger of induced abortion or miscarriage, or surplus frozen embryos. (shrink)

In “Abortion and Ownership” John Martin Fischer argues that in Judith Jarvis Thomson’s violinist case you have a moral obligation not to unplug yourself from the violinist. Fischer comes to this conclusion by comparing the case with Joel Feinberg’s cabin case, in which he contends a stranger is justified in using your cabin to stay alive. I argue that the relevant difference between these cases is that while the stranger’s right to life trumps your right to property in (...) the cabin case, the violinist’s right to life does not trump your right to liberty in the violinist case. (shrink)

This chapter contains sections titled: Pregnancy: Before and After McFall, Shimp, and Thomson's Ailing Violinist Pro‐Choice Does Not Mean Pro‐Abortion Notes.

A virtual reality module that incorporates a training room (for subjects to become accommodated to virtual environments) and VR translations of Philippa Foot's Trolley Problem and Judith Thomson's Violinist thought experiment. -/- These modules are free to use for classroom or research/x-phi purposes. This set of modules is optimized for the HTC Vive. If you have an Oculus Rift, please see our VR modules optimized for the rift. -/- *Requires an HTC Vive and VR capable computer. To access the (...) simulation, uncompress the .zip folder and run the executable (.exe) file. (shrink)

Imagine that your body has become attached, without your permission, to that of a sick violinist. The violinist is a human being. He will die if you detach him. Such detachment seems, nonetheless, to be morally permissible. Thomson argues that an unwantedly pregnant woman is in an analogous situation. Her argument is considered by many to have established the moral permissibility of abortion even under the assumption that the foetus is a human being. Another popular argument is that (...) presented by Singer and Unger to the effect that even those who are moderately prosperous are morally obliged to help the poor if they can do so at relatively small cost to themselves. The paper considers the question whether these two arguments can be simultaneously valid. (shrink)

Imagine that your body has become attached, without your permission, to that of a sick violinist. The violinist is a human being. He will die if you detach him. Such detachment seems, nonetheless, to be morally permissible. Thomson argues that an unwantedly pregnant woman is in an analogous situation. Her argument is considered by many to have established the moral permissibility of abortion even under the assumption that the foetus is a human being. Another popular argument is that (...) presented by Singer and Unger to the effect that even those who are moderately prosperous are morally obliged to help the poor if they can do so at relatively small cost to themselves. The paper (published under the pseudonym 'Nicola Bourbaki') considers the question whether these two arguments can be simultaneously valid. (shrink)

Appealing to reason rather than religious belief, this book is the most comprehensive case against the choice of abortion yet published. This _Second Edition_ of _The Ethics of Abortion _critically evaluates all the major grounds for denying fetal personhood, including the views of those who defend not only abortion but also post-birth abortion. It also provides several justifications for the conclusion that all human beings, including those in utero, should be respected as persons. This book also critiques the view that (...) abortion is not wrong even if the human fetus is a person. _The Ethics of Abortion _examines hard cases for those who are prolife, such as abortion in cases of rape or in order to save the mother’s life, as well as hard cases for defenders of abortion, such as sex selection abortion and the rationale for being "personally opposed" but publically supportive of abortion. It concludes with a discussion of whether artificial wombs might end the abortion debate. Answering the arguments of defenders of abortion, this book provides reasoned justification for the view that all intentional abortions are ethically wrong and that doctors and nurses who object to abortion should not be forced to act against their consciences. Updates and Revisions to the Second Edition include: -A response to Alberto Giubilini’s and Francesca Minerva’s now famous 2012 article, "After-Birth Abortion" in the _Journal of Medical Ethics _ -Responses to new defenses of Judith Jarvis Thomson’s violinist argument -The addition of a new chapter on gradualist views of fetal moral worth, including Jeff McMahan’s Time-Relative Interest Account -The addition of a new chapter on the conscience protection for health care workers who are opposed to abortion -Responses to many critiques of the first edition, including those made by Donald Marquis, David DeGrazia, and William E. May. (shrink)

Defending Life is arguably the most comprehensive defense of the pro-life position on abortion - morally, legally, and politically - that has ever been published in an academic monograph. It offers a detailed and critical analysis of Roe v. Wade and Planned Parenthood v. Casey as well as arguments by those who defend a Rawlsian case for abortion-choice, such as J. J. Thomson. The author defends the substance view of persons as the view with the most explanatory power. The substance (...) view entails that the unborn is a subject of moral rights from conception. While defending this view, the author responds to the arguments of thinkers such as Boonin, Dworkin, Stretton, Ford and Brody. He also critiques Thomson's famous violinist argument and its revisions by Boonin and McDonagh. Defending Life includes chapters critiquing arguments found in popular politics and the controversy over cloning and stem cell research. (shrink)

It is often assumed that if the fetus is a person, then abortion should be illegal. Thomson1 laid the groundwork to challenge this assumption, and Boonin2 has recently argued that it is false: he argues that abortion should be legal even if the fetus is a person. In this article, I explain both Thomson’s and Boonin’s reason for thinking that abortion should be legal even if the fetus is a person. After this, I show that Thomson’s and Boonin’s argument for (...) legalised abortion fail; they have not given us good reason for thinking abortion should be legal.1 Finally, I argue that—if we play Boonin’s game—abortion should be illegal. When discussing the ethics and politics of abortion, whether the fetus is a person is usually central.3 4.2 However, Thomson1 long ago challenged this view. She argued that abortion is permissible even if the fetus is a person. To do so, she asks us to consider a case in which you are non-consensually taken to a hospital and hooked up to a famous violinist. The violinist, if he is to survive, needs to filter his blood through your body. After 9 months, he will be fine and you can unplug yourself and go on your way. If you unplug yourself prior to this, however, he will die. Is it permissible to unplug yourself? Thomson thinks the answer is ‘yes’. And this, she thinks, shows that abortion is permissible even if the fetus is a person. While the majority of her article focuses on the ethics of abortion, it is clear that she also aims to show that abortion should be legal if the fetus is a person; she would no doubt reject the view that the state is right to coerce you into …. (shrink)

Approximately 50 years have passed since Judith Jarvis Thomson wrote A Defense of Abortion (1971). Her article has significantly shaped the philosophical literature on abortion. In this paper, I will summarize some of the interesting and important work done on the topic since Thomson's article. I will highlight Thomson as a defender of the claim that abortion is morally permissible and Don Marquis as an influential opponent of that claim. I will start by articulating Thomson's case, focusing on the (...) class='Hi'>violinist analogy. I will underscore key questions, concepts, and objections the analogy raises. I will then examine briefly how philosophers have addressed some of these issues. Next, I will outline Marquis’ work, provide a similar commentary on it, and discuss some of its main responses. I will then survey other philosophers who have addressed abortion beyond the scope of providing specific replies to Thomson or Marquis. I will close by highlighting significant points of agreement and disagreement in the literature, as well as crucial gaps in the current research. The paper is not an attempt to address every work on the topic over the last five decades, nor is it aimed at taking a position on the moral permissibility of abortion. My goal is to provide an overview of the dialectic. (shrink)

In this paper several reasons as to why framing issues should be of greater interest to both medical ethicists and healthcare professionals are suggested: firstly, framing can help in explaining health behaviours that can, from the medical perspective, appear perverse; secondly, framing provides a way of describing the internal structure of ethical arguments; and thirdly, an understanding of framing issues can help in identifying clinical practices, such as non-directive counselling, which may, inadvertently, be failing to meet their own stated ethical (...) aims. The effect of framing on how individuals interpret information and how healthcare choices are influenced by framing are described. Next, the role of framing in ethical discourse is discussed with specific reference to Judith Jarvis Thomson’s philosophical mind experiment about abortion and the violinist. Finally, the implications of this analysis are examined for the practice of non-directive counselling, which aims at communicating information in a neutral, value-free way and thereby protecting patient autonomy. (shrink)

In a recent JME paper, Matthew John Minehan applies John Rawls’ veil of ignorance against Judith Thomson’s famous violinist argument for the permissibility of abortion. Minehan asks readers to ‘imagine that one morning you are back to back in bed with another person. One of you is conscious and the other unconscious. You do not know which one you are’. Since from this position of ignorance, you have an equal chance of being the unconscious violinist and the conscious (...) person attached to him, it would be rational to oppose a right for detachment. Likewise, behind the veil of ignorance, it is rational to oppose abortions since you could be the fetus, Minehan claims. This paper provides a plausible reply to this argument. (shrink)

This article criticizes what it calls perspectival thought experiments, which require subjects to mentally simulate a perspective before making judgments from within it. Examples include Judith Thomson's violinist analogy, Philippa Foot's trolley problem, and Bernard Williams's Jim case. The article argues that advances in the philosophical and psychological study of empathy suggest that the simulative capacities required by perspectival thought experiments are all but impossible. These thought experiments require agents to consciously simulate necessarily unconscious features of subjectivity. To complete (...) these experiments subjects must deploy theory-theoretical frameworks to predict what they think they would do. These outputs, however, systematically mislead subjects and are highly prone to error. They are of negligible probative value, and this bodes poorly for their continued use. The article ends with two suggestions. First, many thought experiments are not problematically perspectival. Second, it should be possible to carry out “in-their-shoes” perspectival thought experiments by off-loading simulations onto virtual environments into which philosophers place subjects. (shrink)

By “case,” I mean a proxy for some state of affairs, event, sequence of events, or other fact. A case may be as short as a phrase (“a promise to your dying grandfather”) or (in principle, at least) longer than War and Peace. A case may consist of words (as in the typical philosophical example) or have a more dramatic form, such as a movie, stage performance, or computer simulation. Imaginary cases plainly have an important role in contemporary ethics, especially (...) in applied or practical ethics. This paper is a systematic critique of imaginary cases in ethics (what Kant would have called a “prolegomenon” to their use). There are two main parts. The first explains what it is to imagine a case and what limits there are to what can be imagined. The limits of imagination are, in general, determined by the purpose to which the case is to be put. The second part distinguishes nine uses of imaginary cases: rhetorical; probative (subdivided into counterexample, proof of possibility, and pattern-proving); and heuristic (subdivided into illustrative, experiment in theory, insight-sharpening, commitment-mapping, and exploring reasoning process). Some of these uses are (more or less) unobjectionable (whether the particular case succeeds or fails in its objective) but some require special care or outright avoidance. I give examples of how philosophers and other ethicists would be better off if they were more cautious in their use of imaginary cases (including some classic examples, such as Nozick’s book thruster and Thompson’s famous violinist). This paper is especially concerned with the use of imaginary cases in contemporary defenses of torture. (shrink)

The reversal of Roe v. Wade by the U.S. Supreme Court allowed the states to regulate terminations of pregnancy more autonomously than during 1973–2022. Those who think that women should be legally entitled to abortions at their own request are suggesting that annulling the reversal could be an option. This would mean continued reliance on the interpretation of privacy that Roe v. Wade stood on. The interpretation does not have the moral support that its supporters think. This can be shown (...) by recalling the shortcomings of Judith Jarvis Thomson’s famous violinist example and its application to abortion laws. Philosophically better reasons for not restricting access to abortion can be found in a simple principle of fairness and in sensible theories on the value of human life. Whether or not philosophy has any use in the debate is another matter. Legal decisions to regulate terminations are probably based on pronatalist state interests, shared by the apparently disagreeing parties and immune to rational argumentation. (shrink)

Ectogenesis, or the use of an artificial womb to allow a foetus to develop, will likely become a reality within a few decades, and could significantly affect the abortion debate. We first examine the implications for Judith Jarvis Thomson’s violinist analogy, which argues for a woman’s right to withdraw life support from the foetus and so terminate her pregnancy, even if the foetus is granted full moral status. We show that on Thomson’s reasoning, there is no right to the (...) death of the foetus, and abortion is not permissible if ectogenesis is available, provided it is safe and inexpensive. This raises the question of whether there are persuasive reasons for the right to the death of the foetus that could be exercised in the context of ectogenesis. Eric Mathison and Jeremy Davis have examined several arguments for this right, doubting that it exists, while Joona Räsänen has recently criticized their reasoning. We respond to Räsänen’s analysis, concluding that his arguments are unsuccessful, and that there is no right to the death of the foetus in these circumstances. (shrink)

Playing with correct intonation is one of the major challenges for a string player. A player must learn how to physically reproduce a target pitch, but before that, the player must learn what correct intonation is. This requires audiation- the aural equivalent of visualization- of every note along with self-assessment whether the pitch played matches the target, and if not, what action should be taken to correct it. A challenge for successful learning is that much of it occurs during practice, (...) typically without outside supervision. A student who has not yet learned to hear correct intonation may repeatedly practice out of tune, blithely normalising bad habits and bad intonation. The real-time reflective nature of intonation and its consistent demand on attention make it a ripe target for technological intervention. Using a violin augmented to combine fingerboard sensors with audio analysis for real-time pitch detection, we examine the efficacy of three methods of real-time feedback for improving intonation and pitch learning. The first, aural feedback in the form of an in-tune guide pitch following the student in real-time, is inspired by the tradition of students playing along with teachers. The second is visual feedback on intonation correctness using an algorithm optimised for use throughout normal practice. The third is a combination of the two methods, simultaneously providing aural and visual feedback. Twelve beginning violinists, including children and adults, were given four in-situ 20-30 minute lessons. Each lesson used one of the intonation feedback methods, along with a control lesson using no feedback. We collected data on intonation accuracy and conducted interviews on student experience and preference. The results varied by player, with evidence of some players being helped by the feedback methods but also cases where the feedback was distracting and intonation suffered. However interviews suggested a high level of interest and potential in having such tools to help during practice, and results also suggested that it takes time to learn to use the real-time aural and visual feedback. Both methods of feedback demonstrate potential for assisting self-reflection during individual practice. (shrink)

Extensive training with a musical instrument results in the automatisation of the bodily operations needed to manipulate the instrument: the performer no longer has to consciously think about the instrument while playing. The ability of the performer to automate operations on the instrument is due to sensorimotor mechanisms that can predict changes in the state of the body and the instrument in response to motor commands. But how strong are these mechanisms? To what extent can we alter the structure of (...) the instrument before they disappear? We performed an exploratory study to understand whether and how sensorimotor predictions survive instrument modification. We asked seven professional violinists to perform repertoire pieces and sight-reading exercises on four different violins: their own, a cheap violin, a small violin, and a violin whose strings had been put on in reverse order. We performed a series of quantitative investigations on performance intonation and duration, and on bowing gestures and errors. The analysis revealed that participants struggled adapting to the altered instruments, suggesting that prediction mechanisms are a function of instrument configuration. In particular, the analysis of bowing errors, intonation, and of performance duration suggested that the performance with the reverse violin was much less fluent and precise than the performer's own instrument; the performance with the small violin was also sub-standard though to a lesser extent. We also observed that violinists were differently affected by instrument modifications, suggesting that the capability to adapt to a new instrument is highly personal. (shrink)