Heyman's model explains the irrationality of addictive behavior, but it does not satisfactorily answer the question of whether this behavior is voluntary because it does not address the issue of the choice of preference functions. Furthermore, although Heyman disconfirms the disease model of addiction, this does not resolve the issue of whether addiction should be classified as a mental illness.

Heyman's target article contributes to our understanding of addictions by offering solutions to several paradoxes and by recognizing the stable nature of addictive behavior. Previous classical and operant conditioning models have emphasized molecular processes, such as acquisition and extinction, and have failed to address the aggregate effects of long-term exposure to the contingencies of drug and alcohol use.

Melioration is not superior and may be inferior to other extensions of behavioral choice theory to addiction studies. Progress in the addiction field will be accelerated by the demise of the disease model rather than by attempting to resolve the contradictions it has created.

Over the years, many theories have been proposed to account for the aberrant behavior of drug dependent individuals. Heyman posits that the existing theories of drug dependence are inadequate to explain the complex processes inherent in human drug-taking. He proposes that incongruous behaviors that comprise addiction, such as continued drug use in spite of adverse consequences, can be explained by application of the matching law approach. While the matching law theory of addiction explains certain aspects of human behavior, its application (...) to the area of addiction must be subjected to experimental verification. (shrink)

Heyman proposes that external stimuli can promote a switch from a local to a global frame of reference for evaluating the consequences of behavior and that such a change might be critical to breaking the grip of drag addiction. Could incentive stimuli promote a switch in the opposite direction and thus contribute to relapse in the recovered addict?

Extreme sensations – thirst, pain – can focus attention on local consequences at the expense of the overall, perhaps for good evolutionary reasons. Maybe the same phenomenon evolves from prolonged use of addictive substances. The matching law explains mistaken choice, not how a person who has confronted personal catastrophe manages to ignore it in making a locally induced choice.

Two issues are raised. (1) What is the nature of the drug effect Heyman thinks confers value to drugs? (2) What is the evidence that drug use decreases the value of drugs and of conventional incentives over the long-term? There is considerable evidence for the opposite; a persistent increase in the sensitivity of neural systems that mediate drug value.

Heyman s analysis of the relevant complex behavioral variables associated with addiction is evaluated in relation to identifying the appropriate variables in behavior analysis. The model of behavioral allocation and choice known as melioration, discussed by Heyman as a way to understand the complexities of addiction, is examined and contrasted with another model of matching called ratio invariance, which is offered in this commentary as another behavioral account with a significant potential for resolving the contradictions of addiction.

Heyman's target article seeks to resolve the apparent paradox surrounding the issue of control in relation to addictive behaviour. The present commentary argues that addiction is in fact less paradoxical and more easily understandable than Heyman supposes. A fully satisfactory model of addiction, however, requires a more multifaceted approach than that provided by the type of behavioural choice theory favoured by Heyman.

Heyman's analysis of addiction in terms of matching to local relative value can be supplemented by stimulus-control processes. Stimulus equivalence can broaden the set of situations that occasion addictive behavior, and the situation-reinforcer correlation can enhance its persistence. The joint effects of stimulus-control and reinforcement processes may complicate treatment.

This article offers a new formulation of the Socratic principle known as the Principle of the Sovereignty of Virtue. It is divided in three sections. In the first section I criticize Vlastos’ formulation of the PSV. In the second section I present the weighing model of practical deliberation, introduce the concepts of reason for action, simple reason, sufficient reason and conclusive reason that were offered by Thomas Scanlon in Being realistic about reasons, and then I adapt these concepts so as (...) to render them apt to be used in the formulation I intend to offer. In the third section I present my formulation of the PSV using the concepts introduced in the second section and explain why I believe this formulation is better than the one offered by Vlastos. (shrink)

RESUMEN En este trabajo defendemos la siguiente tesis: la argumentación dada en el Filebo sobre los placeres falsos está fundamentada en la exposición de una fisiología ad hoc del alma. Para desarrollar tal idea realizamos el siguiente recorrido. Primero, exponemos dos definiciones de placer y dolor. Luego pasamos al estudio de los conceptos de memoria, sensación y deseo. Como tercer punto, por una parte, analizamos tres argumentos: el de la semejanza entre placer y opinión, el de los placeres falsos por (...) anticipación y el de los placeres falsos por apariencia sobreestimada. Por otra parte, analizamos, partiendo de la exposición precedente, las definiciones ya dadas de las afecciones psíquicas y las relaciones que tienen entre sí, entendiendo estas definiciones y relaciones como la fisiología del alma. Terminamos explicando qué lugar ocupa esta fisiología dentro del objetivo general del diálogo. ABSTRACT In the present work, we defend the following idea: the argument given in Philebus on false pleasures is based on an ad hoc physiology of the soul. To develop this idea, we proceed as follows: first, we introduce two definitions on pleasure and pain ; after that, we study the concepts of memory, perception, and desire ; thirdly, on one hand, we analyze three arguments: the relation between opinion and pleasure, false pleasures by anticipation, and false pleasures by an overestimated appearance ; on the other hand, we analyze, based on the preceding points, the definitions already given on psychic affections and the relations between them, understanding this definitions and relations as the soul's physiology. We end explaining the place given to this physiology in the dialogue's general frame. (shrink)

Heyman's model, paradoxically, predicts that whereas a maximizing approach to drug choice will prevent escalation of drug use it will never yield complete abstinence. We suggest an alternative model that overcomes this difficulty by focusing on changes in drug tolerance. A small modification allows maximization to predict either abstinence or moderation (e.g., social drinking).

Here I reexamine Duhem's question of the continuity between medieval dynamics and early modern conservation theories. I concentrate on the heavens. For Aristotle, the motions of the heavens are eternally constant (and thus mathematizable) because an eternally constant divine Reason is their mover. Duhem thought that impetus and conservation theories, by extending sublunar mechanics to the heavens, made a divine renewer of motion redundant. By contrast, I show how Descartes derives his law of conservation by extending Aristotelian celestial dynamics to (...) the earth. Descartes argues that motion is intrinsically linear, not circular. But he agrees that motion is mathematically intelligible only where divine Reason moves bodies in a constant and eternal motion. Descartes strips bodies of active powers, leaving God as the only natural mover; thus both celestial and sublunar motions are constant, and uniformly mathematizable. The law of conservation of the total quantity of motion is an attempt to harmonize the constancy derived a priori with the phenomenal inconstancy of sublunar motions. (shrink)

Knowledge of specific instances of melioration does not imply knowledge of the variables controlling behavior. Drug self-administration has been successfully analyzed in terms of standard variables such as the immediacy and magnitude of the drug reinforcer. An appeal to melioration may not be necessary.

Addictive behavior has never seemed rational because it persists in spite of drastic aversive consequences. This is a particular problem for models of addiction such as operant psychology which hold that behavior is controlled by its consequences. Inspite of claims to the contrary, Heymans target article illustrates how operant psychology resolves this contradiction. By using the matching law, Heyman suggests a mechanism that explains why delayed aversive events may not control behavior, and a conceptual framework in which we can understand (...) successful therapies. (shrink)

Numerous individual differences determine the effectiveness of the multiple external reinforcement contingencies that control drug seeking behavior. Differences in the capacity to frame reinforcement and also the toxic effects of drugs modulate susceptibility to addiction. As a result, not all individuals are at the same degree of risk for addiction.

The conflict between drug and conventional rewards leads to a paradox: Sanctions against drug use decrease access to conventional rewards and push drug users toward drug abuse, whereas increased access to the rewards of family, friends, and work may help reduce drug abuse. Lack of control is not specific to drug addiction and is unlikely to yield to a shift in bookkeeping.

In the Philebus, Socrates argues that pleasures can be false in the same way that beliefs can be false. On the basis of Socrates' analysis of malicious pleasure, a mixed pleasure of the soul and a passion, I defend the view that, according to Socrates, pleasures can be false when they represent as pleasant something that is not worthy of our enjoyment, where that means that they represent as pleasant something that is not pleasant in its own right because it (...) is not fine. Since these pleasures misrepresent the value of their objects, they involve an evaluative error. In contrast, a pleasure is true when it correctly represents the actual value of things. (shrink)

Heyman makes a convincing case that a melioration choice strategy is sufficient to produce addictive behavior. But given a plethora of addiction theories, the question is whether melioration theory is superior to rivals more sophisticated than a simple disease model or operant conditioning account. Heyman offers little direct evidence that melioration actually causes the addictions we observe.

Choosing the smaller, less delayed reinforcers of drug abuse (including cessation of withdrawal) over the larger, more delayed reinforcers of a healthy life can be described as impulsiveness (the opposite of self-control). Examination of drug abuse using a self-control/impulsiveness framework can help explain many of the puzzles about this behavior, while tying drug abuse into a large research database.

Economic models of addiction are choice-based. These models push the choice paradigm too far by modeling addiction as rational, normative behavior. Heyman's target article provides a sensible alternative to this economic approach by emphasizing that addiction is characterized by ambivalence and a perceived loss of self control. However, matching may not be a satisfactory platform on which to build this alternative model. Matching experiments do not provide evidence of ambivalence or perceived loss of self control.

For use in applied settings, the melioration model will need to incorporate changes in the shapes of local value functions over time, treat current value as a continuous function of time since previous choices, and take into account discounting of the effects of current behavior on future value. The policy implications of the model for regulating drugs are limited.

ABSTRACT: This article addresses two main concerns: first, the relation between the truth/falsehood and purity/impurity criteria as applied to pleasure, and, second, the status of our pleasures of learning. In addressing the first, I argue that Plato keeps the truth/falsehood and purity/impurity criteria distinct in his assessment of pleasures and thus leaves room for the possibility of hybrid pleasures in the form of true impure pleasures and false pure pleasures. In addressing the second issue, I show that Plato's view is (...) perfectly able to accommodate an understanding of our pleasures of learning as pure pleasures even if such pleasures are preceded by awareness of a lack (ignorance).RÉSUMÉ: Cet article aborde deux concepts principaux: premièrement, la relation entre les critères de vérité/fausseté et de pureté/impureté appliqués au plaisir, et deuxièmement, le statut de notre plaisir d'apprendre. En abordant le premier concept, j'argumente que Platon tient distincts les critères de vérité/fausseté et de'pureté Iimpureté dans son évaluation du plaisir, laissant ouverte la possibilité de plaisirs hybrides sous forme de vrais plaisirs impurs et faux plaisirs purs. En abordant le deuxième concept, je montre que le point de vue de Platon est parfaitement capable d'accommoder la compréhension de nos plaisirs d'apprendre comme plaisirs purs si de tels plaisirs sont précédés par la conscience d'un manque (ignorance). (shrink)

Heyman's target article is an analytical tour de force, but it makes too hard a distinction between voluntary and driven behavior. It is more fruitful to think about brain and behavior as shifting, interacting “agents,” represented by multiple neural circuits. This has the virtue of better connecting behavioral analysis with wet neuroscience.

I discuss various theoretical issues concerning maximizing, matching, and melioration. The model of addiction based on melioration has the key feature that a reduction in drag use increases both the value of drag-taking and the value of conventional activities. I found Heyman's target article stimulating. I don't feel competent to comment on drags but I do have some thoughts, both general and specific, on the theoretical issues.

Heyman's analysis of addiction suggests that drug taking is irrational. The irrationality of drug taking, however, may depend on the acceptance of mainstream society's view of what is valuable. Consideration of the addict's viewpoint and cultural aspects of drug taking may be useful in trying to fathom the “rationality” of drug taking.

I support the major theme of Heyman's target article that behavioral choice theory can enhance our understanding of drug dependence, but I raise concerns about the critique of the operant model of drug dependence, the underscoring of melioration to the exclusion of other theories of choice, and assertions about the unique effects of drug reinforcement.

The target article emphasizes the relationship between a matching law-based theory of addiction and the disease model of addiction. In contrast, this response emphasizes the relationship between the matching law theory and other behavioral approaches to addiction. The basic difference, I argue, is that the matching law specifies that choice is governed by local reinforcement rates. In contrast, economics says that overall reinforcement rate controls choice, and for other approaches there are other measures or no clear prediction at all. The (...) response also differs from the target article in that there is more emphasis on the finding that stimulus conditions determine whether choice is under local or overall reinforcement rate control. (shrink)

Research findings on addiction are contradictory. According to biographical records and widely used diagnostic manuals, addicts use drugs compulsively, meaning that drug use is out of control and independent of its aversive consequences. This account is supported by studies that show significant heritabilities for alcoholism and other addictions and by laboratory experiments in which repeated administration of addictive drugs caused changes in neural substrates associated with reward. Epidemiological and experimental data, however, show that the consequences of drug consumption can significantly (...) modify drug intake in addicts. The disease model can account for the compulsive features of addiction, but not occasions in which price and punishment reduced drug consumption in addicts. Conversely, learning models of addiction can account for the influence of price and punishment, but not compulsive drug taking. The occasion for this target article is that recent developments in behavioral choice theory resolve the apparent contradictions in the addiction literature. The basic argument includes the following four statements: First, repeated consumption of an addictive drug decreases its future value and the future value of competing activities. Second, the frequency of an activity is a function of its relative (not absolute) value. This implies that an activity that reduces the values of competing behaviors can increase in frequency even if its own value also declines. Third, a recent experiment (Heyman & Tanz 1995) shows that the effective reinforcement contingencies are relative to a frame of reference, and this frame of reference can change so as to favor optimal or suboptimal choice. Fourth, if the frame of reference is local, reinforcement contingencies will favor excessive drug use, but if the frame of reference is global, the reinforcement contingencies will favor controlled drug use. The transition from a global to a local frame of reference explains relapse and other compulsive features of addiction. (shrink)

Socially extended knowledge has recently received much attention in mainstream epistemology. Knowledge here is not to be understood as wholly realised within a single individual who manipulates artefacts or tools but as collaboratively realised across plural agents. Because of its focus on the interpersonal dimension, socially extended epistemology appears to be a promising approach for investigating the deeply social nature of epistemic practices. I believe, however, that this line of inquiry could be made more fruitful if it is connected with (...) the critical notion of epistemic responsibility, as developed in feminist responsibilism. According to feminist responsibilists, at the core of epistemic responsibility is a critical disposition toward correcting epistemic injustice. This epistemic idea is highly relevant to the epistemological context of illness, where patient testimony is often disregarded. Hence, though restricted to the epistemological context of the experience of illness, this chapter delves into epistemic injustice and its robust mechanisms. I thus explore what responsible epistemic practices should involve in order to redress that injustice and how epistemic responsibility should be socially extended. The discussion proceeds as follows. First, by relying on Arthur Frank’s innovative work on illness narratives, I focus on chaotic bodily messages from patients overwhelmed by suffering and then explain why these messages should count as genuine narratives or testimonies despite their inarticulateness. Second, I elaborate on how epistemic injustice concerning such narratives (i.e., chaos narratives) is produced and reproduced, in particular how both a dominant sociocultural norm and our inherent vulnerability can contribute to its production and reproduction. Finally, I propose an extended form of epistemic responsibility that ameliorates this aspect. Laying particular emphasis on the epistemic role of mature empathy, I characterise the extended epistemic responsibility in terms of extended empathic knowledge. (shrink)

Heyman's two crucial theses are that people over-value immediate rewards, and that addictive substances “subvert the value of competing commodities.” These perennial ideas were discussed by Plato. Whereas Heyman provides scientific clarification and support for the first, the second remains problematic. I outline how this deficiency might be remedied via evolutionary considerations.

This paper puts forward a new interpretation of the argument at Philebus 36c–40d that pleasures can be false. Protarchus raises an objection at 37e–38a, and in response Socrates presents the elaborate painter-scribe analogy. Most previous interpretations do not explain how the analogy answers Protarchus’ objection. On my account, Protarchus’ objection relies on the plausible intuition that pleasure is simply not in the business of assessing the world, and so it cannot be charged with doing so incorrectly. Socrates responds by demonstrating (...) that pleasure can be mistaken about the world, despite not making an independent assessment of it. The painter-scribe analogy demonstrates how pleasure comes to be mistaken about the world by reproducing the mistake of a judgment. Socrates persuades Protarchus that pleasure can be mistaken in part by preserving his intuition that pleasure itself is not the source of the mistake. (shrink)

In the Philebus, Socrates maintains two theses about the relationship between pleasure and the good life: the mixed life of pleasure and intelligence is better than the unmixed life of intelligence, and: the unmixed life of intelligence is the most divine. Taken together, these two claims lead to the paradoxical conclusion that the best human life is better than the life of a god. A popular strategy for avoiding this conclusion is to distinguish human from divine goods; on such a (...) reading, pleasure has merely instrumental value, and it benefits human beings only as a result of their imperfect nature. I argue that certain ‘pure’ pleasures are full-fledged, intrinsic goods in the Philebus, which are even worthy of the gods . This positive evaluation of pure pleasure results from a detailed examination of pleasure, which reveals that different types of pleasures have fundamentally different natures. (shrink)

Heyman's target article makes a strong case for a behavioral approach to addiction, yet some important assumptions require justification, and promising behavioral alternatives to the author's melioration approach should be considered. In particular, the behavioral economic approach to addiction appears well developed and comprehensive. How does the melioration approach complement or improve on a behavioral economic account?

In an interesting passage in the Philebus , Plato associates pure beauty with geometrical forms created by certain measuring tools used both by mathematicians and carpenters. The ‘beauty of figures’ is analysed as' something straight [εθ τι]… and round [περιφερς] and the two- and three-dimensional figures generated from these by [τρνοι] and ruler [κανσ7iota;] and set-squares [γωναι]' He continues: ‘For I maintain that these things are not beautiful in relation to something, as other things are, but they are always beautiful (...) by nature, by themselves…’. (shrink)

In an interesting passage in the Philebus, Plato associates pure beauty with geometrical forms created by certain measuring tools used both by mathematicians and carpenters. The ‘beauty of figures’ is analysed as' something straight [εθ τι]… and round [περιφερς] and the two- and three-dimensional figures generated from these by [τρνοι] and ruler [κανσ7iota;] and set-squares [γωναι]' He continues: ‘For I maintain that these things are not beautiful in relation to something, as other things are, but they are always beautiful by (...) nature, by themselves…’. (shrink)

Heyman's view that addiction can be viewed as a natural outcome predictable by melioration and the matching law is provocative. Remaining to be explained more fully, however, are exactly how his view is an improvement on other reinforcement-based accounts. Included in these elaborations should be an account of how different “bookkeeping schemes” are developed and controlled and what new approaches to treatment and prevention of drug addiction are indicated.

It is difficult to accommodate compulsive drug use that destroys regulation by consequences in a unitary framework of melioration or maximization, especially as both are strategies of behavioral regulation. The “contradiction” of addictive behavior despite aversive consequences is an illusory issue because consequences that do not decrease addictive behavior cannot be considered punishing.

Heyman explains useful ways to bring addictive drug use under environmental control. We doubt that relapse is explained by drug features such as immediate reinforcement, clouding of judgment, and so forth. Relapse may require explanation in terms of enduring sensitization of incentive neural substrates, but even if its causal assumptions are wrong, Heyman's model makes useful predictions for behavioral control.

Editors and translators have found this paragraph troublesome. Though its general tenor is fairly clear it is not easy to interpret in detail, and the task is complicated by three points of uncertainty about the text, Bury conjectured that in 5 is misplaced, and should stand in 3 after. After in 5, the second hand of Ven. 189 adds modern editors have often accepted this addition, In 6, has been thought incomprehensible: Badham offered instead, and this suggestion too has found (...) some favour. (shrink)

Editors and translators have found this paragraph troublesome. Though its general tenor is fairly clear it is not easy to interpret in detail, and the task is complicated by three points of uncertainty about the text, Bury conjectured that in 5 is misplaced, and should stand in 3 after . After in 5, the second hand of Ven. 189 adds modern editors have often accepted this addition, In 6, has been thought incomprehensible: Badham offered instead, and this suggestion too has (...) found some favour. (shrink)

Plato's Philebus contains an intricate difficulty. Plato seems to hold both (a) that all pleasures are processes of becoming, a crucial premise in the argument that no pleasure is good (53c?55c) and (b) that some pleasures contribute in their own right to the goodness of the best life (64c?67b). Since it seems also plausible that only things which are good can contribute to the goodness of the best life in their own right, Plato's view seems to be inconsistent. Interpreters usually (...) reject either (a) or (b). As Plato seems firmly committed to both (a) and (b), I propose a third way of dealing with the inconsistency. The apparent inconsistency highlights a vital contrast between what is independently good (good per se), what is dependently good (good through participating in what is independently good), and what is derivatively good (good through standing in a certain relation to dependent goods). I argue that while pleasure's being a process of becoming marks it out as derivatively good, some kinds of pleasure are also dependent goods in virtue of their objects ? irrespective of their being processes of becoming. (shrink)

The matching law accounts for both addictive behavior and the usefulness of a person's evaluating choices in overall categories. To explain why overall bookkeeping, once learned, does not easily win out over local bookkeeping, another implication of matching is needed: intertemporal bargaining. The role of melioration, though probably important for new addiction is separate.

Plato is commonly considered a metaphysical dualist conceiving of a world of Forms separate from the world of particulars in which we live. This paper explores the motivation for postulating that second world as opposed to making do with the one we have. The main objective is to demonstrate that and how everything, Forms and all, can instead fit into the same world. The approach is exploratory, as there can be no proof in the standard sense. The debate between explaining (...) Plato’s ontology with a single world and requiring a two-world model to make sense of the same thing is typically about scouring the Platonic corpus for evidence and turning to Aristotle for help where we need it. The aim here is to dig deeper than what either of them, or anyone else, has said or implied about the number or worlds, searching instead for any insight that might be gained from the way Forms are supposed to exist versus what we ourselves might understand by existence. Although the paper is, at its most basic level, about the existence of the Forms, the intention is not to prove that they exist, nor to evaluate the proofs and objections already on record, but to consider how they might exist and what follows if they do. Dialogue toward consensus on why we think the Forms exist, and why we think they do not, could perhaps provide a smoother “second sailing” in waters where we have been unable to agree whether they do and where they would if they did. (shrink)

This paper aims to clarify Plato’s notions of the natural and the neutral state in relation to hedonic properties. Contra two extreme trends among scholars—people either conflate one state with the other, or keep them apart as to establish an unsurmount- able gap between both states, I argue that neither view accurately reflects Plato’s position because the natural state is real and can coincide with the neutral state in part, whereas the latter, as an umbrella term, can also be realized (...) in a non-natural condition. The clarification of the relation between the two states will shed light on the degree to which Plato admits and constrains the hedonic value for a good human life; further, this will call attention to some (not well explored) parallel thoughts in the medical tradition to which Plato is indebted. (shrink)

In his rich and suggestive paper, Alvaro Vallejo argues for the novel thesis that Plato posits a form of pleasure in the Republic and the Philebus. Vallejo argues that the notion of a Platonic form of pleasure best explains other things that Plato says about pleasure. First, Plato draws a distinction between true pleasure and the appearance of pleasure. Second, Plato uses the same language to describe the relationship between forms and their inferior instantiations as he uses to describe the (...) relationship between true and false pleasures. In these comments, I argue that we do not need to posit a form of pleasure to explain these features of the text. Moreover, I argue that on Vallejo’s account of the form of pleasure, the form could not do the job required of it, namely, it could not explain the problem with false pleasures. (shrink)

The World We Live In contains private lectures given by Alexandru Dragomir spanning a period from 1985 to 1998. Some lectures are graceful examples of ‘live’ philosophical thinking, where phenomenological investigation and philological skill are combined to probe issues concerning time, space, and technology. Other lectures are less polished and should perhaps not have been published. Almost all the lectures engage with classic philosophical texts, primarily by Plato and Aristotle, and, to a lesser degree, Descartes, Kant, Hegel, and Nietzsche. Dragomir’s (...) mentor Heidegger is more often than not present in the background, through the method of analysis. (shrink)