Résumé Alberto Voltolini préconise une analyse syncrétique des entités fictives, affirmant qu'elle satisfait tous les desiderata d'une analyse appropriée des entités fictives. Cet article présente une analyse des personnages fictifs qui réponde à ces critères, tout en évitant les problèmes que rencontre l'analyse de Voltolini. Selon mon analyse antiréaliste et leibnizienne, un personnage fictif peut être identifié par la collection de prédicats attribués à son nom. Cette analyse offre le bénéfice de la théorie des faisceaux, puisqu'elle écarte la question des (...) porteurs des noms fictifs, tout en expliquant pourquoi un personnage fictif est plus qu'une simple collection de prédicats. (shrink)

Many Bayesians such as White and Silins have argued that Moorean reasoning is defective because it is a case where probabilistic support fails to transmit across the relevant entailment. In this paper, I argue against their claim. On the Bayesian argument, a skeptical hypothesis is that you are a brain in a vat that appears to have hands. To disclose the defect in Moorean reasoning, the Bayesian argument is supposed to show that its appearing to you as if you have (...) hands does not increase the probability of a non-skeptical hypothesis such that you are not a brain in a vat. But what their argument really shows is rather a trivial fact that acquiring theses handlike experiences eliminates the possibility of not having these experiences, and so your having these experiences lowers the probability of the disjunctive claim that you are not a brain in a vat or it does not appear as if you have hands. Along these lines, I argue that what the Bayesian proof establishes has nothing to do with the defect in Moorean reasoning. (shrink)

According to the truth-conduciveness problem of coherentism, the coherence theory of justification can hardly show that coherentist justification is truth-conducive. This problem is generally conceived as the most recalcitrant problem with the coherence theory. The purpose of this paper is to show that it does not pose a serious problem for a certain version of coherentism, namely a Sellarsian explanatory coherence theory of justification combined with the deflationary theory of truth. On this version of coherentism, our epistemic goal is to (...) gradually improve our conceptual framework so as to maximize its explanatory coherence, and there is no substantial norm of truth independent of the norms of justification, so that we cannot evaluate the truth-conduciveness of a belief independently of the norms of justification. I argue that this version of coherentism can cope with the truth-conduciveness problem. (shrink)

The problem of epistemic circularity involved in justifying fundamental epistemic principles is one of the fundamental problems of epistemology. One important way out of this problem is a Sellarsian social practice theory of justification, according to which we are justified in accepting an epistemic principle if we can answer all objections raised against it in our social practice of demanding justification and responding to such demands. The main goal of this paper is to show that this social practice theory can (...) accomplish better than its rival theories, such as Alston’s doxastic practice approach, Sosa’s reliabilist virtue epistemology, and Wright’s entitlement theory, by making comparisons with these influential theories. (shrink)

According to the Kantian-Brandomian view of concepts, we can understand concepts in terms of norms or rules that bind those who apply them, and the application of a concept requires that the concept-user be sensitive to the norms governing its application. But this view faces some serious objections. In particular, according to Rosen, Glüer and Wikforss, this view leads to a vicious regress of norms. The purpose of this paper is to defend a version of the Kantian-Brandomian view of concepts (...) against this objection. I argue that we can deal with this problem along the lines of a coherentist account of justification. (shrink)

RÉSUMÉRécemment, Anil Gupta a soulevé plusieurs objections importantes à l’encontre de la théorie de la perception de Wilfrid Sellars. Cet article se donne pour objectif de défendre la théorie de Sellars contre ces objections. J’admets que certains aspects de sa théorie posent problème. Il y a, par exemple, de bonnes raisons de rejeter la thèse de Sellars selon laquelle le référent ultime d’une saisie perceptive est une impression sensible. Néanmoins, je soutiens qu’une explication sellarsienne de la perception reste une approche (...) viable de la perception, en dépit des puissantes objections de Gupta. (shrink)

The goal of this paper is to present and defend an inferentialist account of the meaning of fictional names on the basis of Sellars-Brandom’s inferentialist semantics and a Brandomian anaphoric theory of reference. On this inferentialist account, the meaning of a fictional name is constituted by the relevant language norms which provide the correctness conditions for its use. In addition, the Brandomian anaphoric theory of reference allows us to understand reference in terms of anaphoric word-word relations, rather than substantial word-world (...) relations. In this paper I argue that this inferentialist account has many important merits over its rival theories. One important merit is that it explains why we can use fictional names to make true statements, even if they lack bearers. As a consequence, this theory allows us to use fictional names without committing ourselves to an implausible ontology of fictional entities. Another important merit is that it provides a uniform semantic account of fictional names across different types of statements in which fictional names are involved. (shrink)

Can we show that our senses are reliable sources of information about the world? To show this, we need to establish that most of our perceptual judgments have been true. But we cannot determine these inductive instances without relying upon sense perception. Thus, it seems, we cannot establish the reliability of sense perception by means of an argument without falling into epistemic circularity. In this paper, I argue that this consequence is not an epistemological disaster. For this purpose, I defend (...) a normative claim that it is reasonable to accept the general reliability of our perceptual judgments, instead of a factual claim that our perceptual judgments are generally reliable. More specifically, I offer a normative practical argument which explains why it is reasonable to accept the general reliability of our perceptual judgments, even though we cannot establish the general reliability of our perceptual judgments by means of theoretical reasoning. (shrink)

According to a Kantian-Brandomian view of concepts, we can understand concepts in terms of norms or rules that bind those who apply them, and the use of a concept requires that the concept-user be sensitive to the relevant conceptual norms. Recently, Ginsborg raises two important objections against this view. According to her, the normativity Brandom ascribes to concepts lacks the internalist or first-person character of normativity that Kant’s view demands, and the relevant normativity belongs properly not to concepts as such, (...) but rather to belief or assertion. The purpose of this paper is to defend a Kantian-Brandomian view of concepts against these objections. (shrink)

Moore's paradox arises from the logicaloddity of sentences of the form`P and I do not believe that P'or `P and I believe that not-P'. Thiskind of sentence is logically peculiarbecause it is absurd to assert it, although it isnot a logical contradiction. In this paperI offer a new proposal. I argue that Moore's paradox arises because there is a defaultprocedure for evaluating a self-ascribed belief sentence and one is presumptivelyjustified in believing that one believes a sentence when one sincerely assents (...) to it. (shrink)

ABSTRACT: Ever since Hume raised the problem of induction, many philosophers have tried to solve this problem; however, there still is no solution that has won wide acceptance among philosophers. According to Wilfrid Sellars, the reason is mainly that these philosophers have tried to justify induction by theoretical reasoning rather than by practical reasoning. In this paper I offer a sort of Sellarsian proposal. On the basis of the instrumental principle and the constructivist view of the concept of epistemic justification, (...) I argue that it is reasonable to accept induction.RÉSUMÉ: Depuis que Hume a soulevé le problème de l’induction, nombreux ont été les philosophes qui se sont attaqués à cette question. Aucun, pourtant, n’y a jusqu’à présent apporté de réponse satisfaisante et susceptible d’entraîner l’adhésion générale. Selon Wilfrid Sellars, la raison de cet échec est que les tentatives de justification se fondaient sur des raisonnements théoriques plutôt que pratiques. L’auteur offre ici une sorte de solution «sellarsienne» au problème. À partir du principe instrumental et de la conception constructiviste de la justification épistémique, l’auteur tente de démontrer qu’il est raisonnable d’accepter l’induction. (shrink)

In the second Critique, Kant claims that the moral law is given as a fact of reason. In this paper, contra the standard view, I argue that there is a non-dogmatic way of defending this claim. And Kant’s principle of morality is widely taken to be a formal principle. How then can such a formal principle be reconciled with our substantial moral end? In this paper, I also argue that Kant’s principle of morality can be construed as a formal principle (...) in the sense that it provides correctness conditions for moral laws, rather than providing specific moral laws.Dans sa deuxième Critique, Kant affirme que la loi morale se donne comme un fait de raison. Dans cet article, contrairement à la position standard, nous prétendons qu’il existe une autre façon — non dogmatique — de défendre cette affirmation. Par ailleurs, le principe de moralité de Kant est largement considéré comme étant formel. Comment un tel principe formel peut-il être réconcilié avec notre fin morale substantielle? Nous soutenons également que le principe de moralité de Kant peut être interprété comme un principe formel dans le sens où il fournit des conditions d’acceptabilité pour les lois morales, et non des lois morales spécifiques. (shrink)

Robert Brandom argues for a “pragmatic phenomenalist account” of knowledge. On this account, we should understand our notion of justification in accordance with a Sellarsian social practice model, and there is nothing more to the phenomenon of knowledge than the proprieties of takings-as-knowing. I agree with these two claims. But Brandom's proposal is so sketchy that it is unclear how it can deal with a number of much-discussed problems in contemporary epistemology. The main purpose of this article is to develop (...) and defend a pragmatic phenomenalist account of knowledge by resolving those problems. I argue, in particular, that this account can accommodate both the lesson of the Gettier problem and the lesson of reliabilism simultaneously. -/- RÉSUMÉ: Robert Brandom soutient une «théorie pragmatique et phénomenaliste» de la connaissance. Selon cette théorie, nous devons comprendre notre notion de justification d'après un modèle sellarsien de la pratique sociale, et il n'y a rien d'autre dans phénomène de connaissance que la pertinence de «prendre-pour-connaître». Je suis tout à fait d'accord avec ces deux opinions. Mais la thèse de Brandom est si sommaire qu'il n'est pas évident de savoir comment elle peut trailer les nombreux problèmes discutés en épistémologie contemporaine. Le but principal de cet article est de développer et défendre une théorie pragmatique et phénomenaliste de la connaissance en résolvant ces problèmes. Je soutiens, en particulier, que cette théorie peut s'accorder en même temps à lerçon du problème de Gettier et au «fiabilisme». (shrink)

BonJour affirme qu’il a trouvé un moyen de sortir du dilemme sellarsien de la justification non-doxastique. Dans cet article, je soutiens trois thèses afin de montrer que sa solution alléguée échoue. Tout d’abord, il y a deux exigences pour qu’une raison soit bonne, et la notion de prise de conscience non-conceptuelle de l’expérience sensorielle développée par BonJour donne lieu à un dilemme sérieux en ce qui concerne ces exigences. Deuxièmement, il tire son idée de la soi-disant «prise de conscience constitutive (...) du contenu» de sa conception de la croyance consciente et occurrente. Mais cette conception conduit à un dilemme analogue à l’égard de ces exigences. Troisièmement, son explication se heurte au problème de la représentation. (shrink)

Fales defends the doctrine of the given against the Sellarsian dilemma. On his view, sensory experiences, to which one has direct access, can justify basic beliefs. He upholds this view by way of defending an expansive conception of inference, according to which a broadly inferential relation can hold between sensory experiences and perceptual beliefs. The purpose of this paper is to show that Fales’s defense of the given fails. For this purpose, I argue that there are two requirements for being (...) a good reason, and that his conception of direct apprehension faces a serious dilemma with regard to these requirements. In addition, I argue that his expansive conception of inference is unfounded. (shrink)

Robert Brandom argues for a “pragmatic phenomenalist account” of knowledge. On this account, we should understand our notion of justification in accordance with a Sellarsian social practice model, and there is nothing more to the phenomenon of knowledge than the proprieties of takings-as-knowing. I agree with these two claims. But Brandom's proposal is so sketchy that it is unclear how it can deal with a number of much-discussed problems in contemporary epistemology. The main purpose of this article is to develop (...) and defend a pragmatic phenomenalist account of knowledge by resolving those problems. I argue, in particular, that this account can accommodate both the lesson of the Gettier problem and the lesson of reliabilism simultaneously. (shrink)

In a number of papers, Sydney Shoemaker has argued that first-order belief plus rationality implies second-order belief. This paper is a critical discussion of Shoemaker's argument.

The epistemic paradox of 'belief instability' has recently received notable attention from many philosophers. Understanding this paradox is very important because belief is a central notion of psychologically motivated semantic theories in philosophy, linguistics, and cognitive science, and this paradox poses serious problems for these theories. In this dissertation I criticize previous proposals and offer a new proposal, which I call a 'revision theory of belief'. ;My revision theory of belief is in many respects an application of Gupta's and Belnap's (...) revision theory of truth, which is proposed to deal with the Liar paradox. They argue that truth is a circular notion because Tarski biconditionals provide circular, partial definitions of truth. And this circularity of truth is the source of the Liar paradox. I offer a similar proposal for handling the paradox of belief instability. In particular, I argue that our notion of belief involved in the paradox of belief instability is circular, and that is why this paradox arises. ;If the notion of belief involved in the paradox is circular, we have to employ a hypothetical evaluation of the belief predicate, and if we do so through a revision process, we can avoid the contradiction which seems to be generated by some paradoxical belief sentences. But it is not easy to show that our notion of belief is circular. Especially, there is nothing like Tarski biconditionals in the case of belief. Nonetheless, I show in this dissertation that there is a certain schema, which I call the B-schema, whose instances can be taken as circular, partial definitions of a notion of belief, and it is that notion of belief which is involved in the paradox of belief instability. In this dissertation I also show that the revision approach can be extended for handling the Knower paradox. I argue that the Knower paradox arises because our notion of knowledge involved in the paradox is circular. (shrink)

Benatar argues that the absence of cosmic meaning is part of the reason why our lives are so bad that we had better not procreate. The goal of this paper is to argue against this claim from a Kantian point of view. For this goal, I argue first that the fact that human life is a product of blind evolution is not a reason for justifying that our lives are overall bad, mainly on the grounds that the concepts of good (...) and bad make sense only within the logical space of reasons. I also argue that the fact that we can hardly make a significant difference to the universe is not a reason for justifying that our lives are overall bad, either, mainly on the grounds that whether one's life is good or bad can be evaluated primarily in terms of whether one's permissible ends are achieved to a satisfactory extent, and so one's good life does not depend on making a significant difference to the universe. (shrink)

In this paper I offer a coherentist justification of induction along the lines of a Sellarsian coherence theory. On this coherence theory, a proposition is justified if we can answer all objections raised against it in our social practice of demanding justification and responding to such demands. On the basis of this theory of justification, I argue that we are justified in accepting the uniformity of nature partly because we have no alternative but to accept it for rationally pursuing our (...) epistemic goal. In addition, my coherentist view explains which inductive inferences it is rational to accept. Furthermore, my coherentist view also explains why we can hardly determine a particular numerical value x such that we can draw the conclusion ‘it is rational to accept that p’ from the premise ‘the numerical probability of p is greater than or equal to x’. (shrink)

Gertler argues that, in some introspective judgments about experience, phenomenal reality intersects with one's grasp of that reality to the effect that one can have knowledge by acquaintance. This new version of the acquaintance theory depends on the idea that some introspective judgments about experience can be justified by the fact that the phenomenal property of an experience is a component of the introspective judgment about the experience. The goal of this paper is to show that even this most promising (...) version of the acquaintance theory is not successful. For this goal, in particular, I argue that even if we grant that, in the relevant cases, the phenomenal property of an experience is a component of an introspective judgment, this fact can hardly play the epistemic role that Gertler envisions. I establish this on the basis of two internalist requirements for reasons, namely, the evaluability condition and the endorsement condition. On the former condition, a reason for justifying a judgment must be the kind of thing that can be evaluated as correct or incorrect. And on the latter condition, having a reason for justifying a judgment requires that the subject endorse the reason as correct. (shrink)

John Broome defends what he calls ‘Enkrasia’, which is roughly this: Rationality requires of you that if you believe that you ought to do A, you intend to do A. He provides two arguments for Enkrasia. First, he argues for what he calls ‘enkratic reasoning’: ‘I ought to do A. So I shall do A’. Second, he also provides the following line of argument: Enkrasia is the requirement not to be akratic; akrasia is irrational; so Enkrasia is a rational requirement. (...) The purpose of this paper is to show that these two arguments are not successful. For this purpose, I argue for two things. The alleged enkratic reasoning is not a genuine rule of reasoning. And it is not appropriate to understand Enkrasia in terms of akrasia, either. (shrink)

ABSTRACT: In a recent article, D. H. Finkelstein offers a new proposal about the distinction between conscious and unconscious belief On his proposal, someone’s belief is conscious if he has an ability to express it simply by self-ascribing it; and someone’s belief is unconscious if he lacks such an ability. In this article, I argue that his proposal is inadequate, and then offer a somewhat different proposal. On my proposal, someone’s belief is conscious if he has self-ascribed this belief without (...) recourse to any evidence about his behaviour; and someone’s belief is unconscious if it is not conscious.RÉSUMÉ: Dans un récent article, D. H. Finkelstein propose une nouvelle distinction entre croyance consciente et inconsciente. Suivant cette proposition, la croyance de quelqu’un est consciente s’il a la capacité de l’exprimer tout simplement en se l’attribuant; sa croyance est inconsciente s’il n’en a pas la capacité. Dans cet article, je fais valoir que cette proposition est inadéquate, et je propose ensuite une nouvelledistinction. Suivant cette distinction, la croyance de quelqu’un est consciente s’il s’attribue cette croyance sans s’appuyer sur aucun élément de preuve au sujet de son comportement; sa croyance est inconsciente si elle n’est pas consciente. (shrink)

RésuméDans un récent article, D. H. Finkelstein propose une nouvelle distinction entre croyance consciente et inconsciente. Suivant cette proposition, la croyance de quelqu'un est consciente s'il a la capacité de l'exprimer tout simplement en se l'attribuant; sa croyance est inconsciente s'il n'en a pas la capacité. Dans cet article, je fais valoir que cette proposition est inadéquate, et je propose ensuite une nouvelle distinction. Suivant cette distinction, la croyance de quelqu'un est consciente s'il s'attribue cette croyance sans s'appuyer sur aucun (...) ilement depreuve au sujet de son comportement; sa croyance est inconsciente si elle n'est pas consciente. (shrink)

According to Lehrer’s defeasibility account of knowledge, we can understand knowledge as undefeated justified true belief. But this account faces many serious problems. One important problem is that from one’s subjective point of view, one can hardly bridge the gap between one’s personal justification and objective truth. Another important problem is that this account can hardly accommodate the externalist intuition that the epistemic status of a belief is not entirely determined by factors that are internal to the subject’s perspective. The (...) goal of this paper is to offer an alternative account of knowledge which can successfully deal with these problems. On the basis of a Sellarsian social practice theory of justification, I argue that we can understand knowledge as objectively justified belief. (shrink)

One reliabilist option against the problem of bootstrapping is to argue that circular reasoning is bad, but reliabilism can avoid circular reasoning. Vogel dismisses this option on the grounds that reliabilists need circular reasoning in order to circumvent skepticism. Briesen argues, however, that although reliabilists need circular reasoning to block second-order skepticism, they do not need it to block first-order skepticism. But I argue in this paper that reliabilists cannot legitimately reject first-order skepticism unless they can block second-order skepticism. In (...) particular, I argue that reliabilists cannot meet the non-undermining provision for justification unless they can somehow block second-order skepticism. (shrink)

On Brandom’s view, we can understand objectivity in terms of the view that what is objectively correct potentially transcends any given attitude. But Levine challenges this view. He distinguishes between two questions of objectivity: ‘How do we grasp the concept of objectivity?’ and ‘What determines the difference between what is correct and what is merely taken to be correct?’ And he argues that Brandom’s account of objectivity fails to address the second question of objectivity. Furthermore, based on classical pragmatist views, (...) he defends an alternative account, which he calls ‘an experiential-theoretical account of objectivity’. I agree with Levine that Brandom’s structural account of objectivity can hardly answer the second question of objectivity. In this paper, however, I argue that we can answer the second question of objectivity without accepting Levine’s claim that experience has a rational bearing on the contents of empirical thoughts. (shrink)

On the normativity objection to Horwich’s minimalist theory of truth, his theory fails to capture the value of truth. In response to this objection, he argues that his minimalist theory of truth is compatible with the value of truth. On his view, the concept of truth is not constitutively normative, but the value of true beliefs can be explained instead by the belief-truth norm that we ought to want our beliefs to be true, and the value of true beliefs expressed (...) in this norm is a moral value. I accept a deflationary theory of truth, according to which truth is too thin a concept to be constituted by any substantial norms. Thus I agree that the concept of truth is not constitutively normative. In this paper, however, I argue that the alleged value of true beliefs can be better explained in terms of epistemic normativity rather than moral normativity. (shrink)

RÉSUMÉ: Utilisant ce qu'on appelle l'argument du lance-pierres, Davidson soutient que la théorie correspondantiste de la vérité est intenable. Cet argument dépend de deux présuppositions, dont l'une est qu'une phrase vraie ne devrait pas, par substitution de termes singuliers coréférentiels, en venir à correspondre à quelque chose de différent. Je propose dans cet article un argument nouveau pour montrer que cette supposition n'est pas plausible, particulièrement lorsqu'elle s'applique à des énoncés d'identité, ceux-là mêmes dont dépend pour sa formulation l'argument du (...) lance-pierres. (shrink)

Le défi le plus important auquel doivent faire face les tenants d’une conception déflationniste de la vérité est l’argument de l’action réussie. Celui-ci fut défendu par Kitcher : afin de rendre compte d’une action réussie, il faudrait expliquer pourquoi une et une même action peut être à la fois psychologiquement et effectivement pertinente. Pour lui, seule la vérité-adéquation permet de répondre à cette exigence. Dans cet article, je soutiens qu’afin de rendre compte d’une action réussie, il convient d’expliquer en quoi (...) l’action d’un agent lui est un moyen approprié d’atteindre ses fins, et que cette explication même, dans le cadre d’une conception déflationniste, suffit à répondre à l’exigence théorique de Kitcher. (shrink)

In his papers ‘Semantic Paradox ’ and ‘The Liar Paradox: Tangles and Chains,’ Tyler Burge provides a hierarchical solution to the Liar paradox. And in his paper ‘Epistemic Paradox ’ Burge extends his hierarchy approach to the epistemic paradox of belief instability, which I shall explain shortly. Although Burge's views on the Liar paradox have been widely criticized, his views on the paradox of belief instability have not received notable attention. In this paper I shall argue that Burge's proposal is (...) inadequate as a solution to the paradox of belief instability. For this purpose, I shall criticize Burge's claim that a circular evaluation of a thought is impossible, which is crucial for his proposal. The question of whether or not a circular evaluation of belief is possible is of its own philosophical interest as well. (shrink)

The model-theoretic argument, which Putnam employs to argue againstmetaphysical realism, has faced serious objections of many realist opponents.Igor Douven in his recent paper offers a new interpretation of the model-theoreticargument, which avoids the previous objections. The purpose of this paper is toshow that Douven's reconstruction of Putnam's argument is not successful, andhence that the realist objections still stand.

The article states that the Knower paradox exposes the circularity of the conceptualization of knowledge. The article provides an explanation of the Knower paradox for the purpose of demonstrating how the paradox arises. A modification to the concept of knowledge is presented to solve the paradox and structure knowledge.

The epistemic paradox of 'belief instability' has recently received notable attention from many philosophers. Understanding this paradox is very important because belief is a central notion of psychologically motivated semantic theories in philosophy, linguistics, and cognitive science, and this paradox poses serious problems for these theories. In this dissertation I criticize previous proposals and offer a new proposal, which I call a 'revision theory of belief'. -/- My revision theory of belief is in many respects an application of Gupta's and (...) Belnap's revision theory of truth, which is proposed to deal with the Liar paradox. They argue that truth is a circular notion because Tarski biconditionals provide circular, partial definitions of truth. And this circularity of truth is the source of the Liar paradox. I offer a similar proposal for handling the paradox of belief instability. In particular, I argue that our notion of belief involved in the paradox of belief instability is circular, and that is why this paradox arises. -/- If the notion of belief involved in the paradox is circular, we have to employ a hypothetical evaluation of the belief predicate, and if we do so through a revision process, we can avoid the contradiction which seems to be generated by some paradoxical belief sentences. But it is not easy to show that our notion of belief is circular. Especially, there is nothing like Tarski biconditionals in the case of belief. Nonetheless, I show in this dissertation that there is a certain schema, which I call the B-schema, whose instances can be taken as circular, partial definitions of a notion of belief, and it is that notion of belief which is involved in the paradox of belief instability. In this dissertation I also show that the revision approach can be extended for handling the Knower paradox. I argue that the Knower paradox arises because our notion of knowledge involved in the paradox is circular. (shrink)

Ormerod and Chronicle reported that optimal solutions to traveling salesperson problems were judged to be aesthetically more pleasing than poorer solutions and that solutions with more convex hull nodes were rated as better figures. To test these conclusions, solution regularity and the number of potential intersections were held constant, whereas solution optimality, the number of internal nodes, and the number of nearest neighbors in each solution were varied factorially. The results did not support the view that the convex hull is (...) an important determinant of figural attractiveness. Also, in contrast to the findings of Ormerod and Chronicle, there were consistent individual differences. Participants appeared to be divided as to whether the most attractive figure enclosed a given area within a perimeter of minimum or maximum length. It is concluded that future research in this area cannot afford to focus exclusively on group performance measures. (shrink)

The ectoplasmic specialization (ES) is a testis‐specific, actin‐based hybrid anchoring and tight junction. It is confined to the interface between Sertoli cells at the blood–testis barrier, known as the basal ES, as well as between Sertoli cells and developing spermatids designated the apical ES. The ES shares features of adherens junctions, tight junctions and focal contacts. By adopting the best features of each junction type, this hybrid nature of ES facilitates the extensive junction‐restructuring events in the seminiferous epithelium during spermatogenesis. (...) For instance, the α6β1‐integrin–laminin 333 complex, which is usually limited to the cell–matrix interface in other epithelia to facilitate cell movement, is a putative apical ES constituent. Furthermore, JAM‐C and CAR, two tight junction integral membrane proteins, are also components of apical ES involving in spermatid orientation. We discuss herein the mechanisms that maintain the cross‐talk between ES and blood–testis barrier to facilitate cell movement and orientation in the seminiferous epithelium. BioEssays 29: 36–48, 2007. © 2006 Wiley Periodicals, Inc. (shrink)