Is consolidation needed to account for retroactive interference in free recall? Interfering mental activity during the retention interval of a memory task impairs performance, in particular if the interference occurs in temporal proximity to the encoding of the to-be-remembered information. There are at least two rival theoretical accounts of this temporal gradient of retroactive interference. The cognitive neuroscience literature has suggested neural consolidation is a pivotal factor determining item recall. According to this account, interfering activity (...) interrupts consolidation processes that would otherwise stabilize the memory representations of TBR items post-encoding. Temporal distinctiveness theory, by contrast, proposes that the retrievability of items depends on their isolation in psychological time. According to this theory, information processed after the encoding of TBR material will reduce the temporal distinctiveness of the TBR information. To test between these accounts, implementations of consolidation were added to the SIMPLE model of memory and learning. We report data from two experiments utilizing a two-list free recall paradigm. Modeling results imply that SIMPLE was able to model the data and did not benefit from the addition of consolidation. It is concluded that the temporal gradient of retroactive interference cannot be taken as evidence for memory consolidation. (shrink)

ABSTRACTBecause negative emotional memories are often disruptive, we conducted two experiments to reduce these memories by using a retroactive interference paradigm. In both experiments, participants were presented with highly negative pictures followed by highly negative, moderately negative, or neutral pictures or a rest period. Then, following a filler task, participants took a surprise free recall test, recalling pictures from List 1 in Experiment 1 and from both List 1 and List 2 in Experiment 2. In both experiments, recall (...) of List 1 was reduced by List 2, indicating that RI was present. Furthermore, in Experiment 1, RI was similar between moderately negative and highly negative List 2 whereas in Experiment 2, RI was greater for highly negative List 2 than moderately negative List 2. These results showed that RI can be used to reduce negative emotional memories by making these memories inaccessible. (shrink)

Three‐ to 4‐month‐old infants show asymmetric exclusivity in the acquisition of cat and dog perceptual categories. The cat perceptual category excludes dog exemplars, but the dog perceptual category does not exclude cat exemplars. We describe a connectionist autoencoder model of perceptual categorization that shows the same asymmetries as infants. The model predicts the presence of asymmetric retroactive interference when infants acquire cat and dog categories sequentially. A subsequent experiment conducted with 3‐ to 4‐month‐olds verifies the predicted pattern of (...) looking time behaviors. We argue that bottom‐up, associative learning systems with distributed representations are appropriate for modeling the operation of short‐term visual memory in early perceptual category learning. (shrink)

How people learn chunks or associations between adjacent items in sequences was modelled. Two previously successful models of how people learn artificial grammars were contrasted: the CCN, a network version of the competitive chunker of Servan‐Schreiber and Anderson [J. Exp. Psychol.: Learn. Mem. Cogn. 16 (1990) 592], which produces local and compositionally‐structured chunk representations acquired incrementally; and the simple recurrent network (SRN) of Elman [Cogn. Sci. 14 (1990) 179], which acquires distributed representations through error correction. The models' susceptibility to two (...) types of interference was determined: prediction conflicts, in which a given letter can predict two other letters that appear next with an unequal frequency; and retroactive interference, in which the prediction made by a letter changes in the second half of training. The predictions of the models were determined by exploring parameter space and seeing howdensely different regions of the space of possible experimental outcomes were populated by model outcomes. For both types of interference, human data fell squarely in regions characteristic of CCN performance but not characteristic of SRN performance. (shrink)

The assertion that an experiment by Afshar et al. demonstrates violation of Bohr’s Principle of Complementarity is based on the faulty assumption that which-way information in a double-slit interference experiment can be retroactively determined from a future measurement.

Je lui ai associÉ un court extrait d'une revue de questions portant sur le même thème. Implicit memory is revealed when previous experiences facilitate perf on a task that does not require conscious or intentional recollection of those expces. Explicit memory is revealed when perf on a task requires conscious recolelction of previous expces. Il s'agit de defs descriptives qui n'impliquent pas l'existence de deux systs de mÉmo sÉparÉs. Historiquement Descartes est le premier ˆ faire mention de phÉnomènes de mÉmo (...) implicites, Leibniz, Maine de Biran, Bergson en ont Également parlÉ. Korsakoff (1889) avec ses travaux sur les amnÉsiques montre qu'ils sont capables d'utiliser de l'info qu'ils ont acquises dans des Épisodes rÉcents sans pour autant manifester le moindre souvenir de l'Épisode. L'interprÉtation de ces phÉnomènes Était alors que ça renvoyait ˆ des traces en mÉmoire trop tÉnues pour accèder jusqu'au champ de la conscience. Cette interprÉtation va pouvoir être ÉcartÉe par les travaux rÉcents. Thorndike a Également conduit un nbre important de travaux sur MI. Les trauvaux un peu plus rÉcents ont montrÉ qu'un apprentissage antÉrieur pouvait faciliter une perfce sans qu'il y ait ref explicite à l'Épisode d'apprentissage. On a montrÉ aussi l'effet de stimuli subliminaux, qui en tant que tels ne peuvent pas être rappelÉs consciemment, mais qui influencent la conduite ou les jugts ultÉrieurs. Par ex, la prÉsentation de formes sur des temps très courts qui excluent la possibilitÉ d'une perception consciente influence significativement lechoix de formes dans une pÉreuve ultÉrieure de choix forcÉs où les sjts doivent indiquer la forme qu'il prÉfère entre deux. Ils choisissent prÉfÉrentiellement celles qui leur ont ÉtÉ prÉsentÉes de manière subliminale. De même Bargh et al. ont montrÉ que des sjts soumis de manière subliminale ˆ des mots hostiles portent ultÉrieurement des jugts plus nÉgatifs sur une personne target. Il ya Également eu des travaux sur l'apprsge ou le condt without awareness en particulier apprsge implicite de règles de grammaire (ie le sjt peut construire de nouvelles phrases conformes ˆ la syntaxe de celles qui lui ont ÉtÉ prÉsentÉes sans pour autant petre capables d'noncer les règles de grammaire qu'il utilise) Rem: N'est ce pas un pbe de typemÉtacognition??? Enfin, tous les travaux sur le priming sont des elts en faveur de MI: Facilitation in the processing of a stimulus as a function of a recent encounter with the same stimulus. Type de perfce sur lesquels les effets de priming ont ÉtÉ dÉmontrÉs: -T‰ches de dÉcision lexicale: Le sjt doit dire si la cha"ne de caractères qu'on lui prÉsente est un mot ou pas: Le temps de latence est beaucoup plus court si la cha"ne a dÉjˆ ÉtÉ prÉsentÉe une première fois. -Mesures de temps d'identification de mots en rpÉsentation tachitoscopiques -ComplÉmentation de mots: les sjts ont tendance ˆ complÉter pour crÉer les mots qui leur ont ÉtÉ prÉsentÉs antÉrieurement. L'intÉrêt pour le paradigme de priming se retouve chez les gens qui s'intÉressent ˆ: -reconnaissance de mots et organisation lexicale. les effets de priming permettent de faire des hyps sur l'accès lexical et la reprÉsentation. -M. Épisodique: travux sur les amnÉsiques qui ne se souviennent pas qu'on vient de leur prÉsenter des mots mais qui manifestent une mÉmoire implicite lorsqu'on leur fait faire de la complÉmentation de mots. DISSOCIATION ENTRE M.I. ET M EXPLICITE 1-Si de nombreux travaux montrent que la M explicite est influencÉe par le travail d'Élaboration (profondeur de traitement) en jeu pendant la première phase d'Étude des stimuli, il semble que la MI ne le soit pas. 2-Le changt de modalitÉ (par ex auditif -> visuel) entre la phase d'Étude et la phase de test provoque une attÉnuation importante de l'effet de priming si le test est un test de MI mais pas si c'est un test de ME. 3-Les effets de primings persistent assez largement sur plusieurs jours ce qui n'est pas le cas des perfces ˆ une Épreuve de reconnaissance. 4-Les perfces sur des tests de MI ne semblent pas influencÉes par des manipulations d'interfÉrences proactives ou rÉtroactives dont on sait qu'elles influencent les perfces en ME. 5-Absce de corrÉlation entre perfces ˆ des tests de reconnaissance et perfces ˆ une Épreuve de complÉmentation de mots. SIMILARITES ENTRE PRIMING ET REMEMBERING 1- A certaines conditions les durÉes de rÉtention on des effets parallèles sur les effets de priming et les mesures de ME (REm: en partie contradictoire avec 3 ci dessus) 2-La manipulation du contexte de la liste lors de la phase d'Étude affecte ˆ la fois les perfces en reconnaissance et en identification de mots. 3- ME et MI sont influencÉes par des associations nouvellement acquises entre des paires de mots non reliÉes (Rem: contradictoires avec 4 ci dessus ??) 4- Rem: Le contraire de 1 du pt "dissociation" !!!! dans une manip particulière 5-Johnston et al. ont montrÉ que des mots identifÉs plus rapidement Étaient plus svt jugÉs comme 'old' dans une t‰che de reconnaissance que les mots identifiÉs plus lentement. Il n'est pas exclu que les phÉnomènes que l'on interprètent comme relevant de MI soient parfois de la ME involontaire cad des cas o les cues fournis dans le test conduisent ˆ un souvenir involontaire mais totalement conscient. LES INTERPRETATIONS THEORIQUES DE MI 1-Les effets de priming sur des test de MI sont attribuables ˆ l'activation temporaires de reprÉsentations ou structures de K prÉ-existantes . Cette activation est supposÉe avoir lieu de manière automatique, indÉpendamment des processus d'Élaboration nÉcessaires pour Établir de nouvelles traces Épisodiques. 2- les difÉrences entre ME et MI sont dues ˆ la nature et aux relations entre les processus d'encodage et de rÉcupÉration. Une version de cette approche est celle qui s'appuie sur la distinction entre processus dirigÉs par les donnÉes et processus dirigÉs par les concepts. Ces derniers reflètent des activitÉs initiÉes par le sjt comme l'Élaboration, l'organisation et la reconstruction, c'est sur ce type de processus que reposerait la ME alors que la MI reposerait sur des processus data-driven. 3-ME et MI renvoient ˆ des systs sous jacents diffÉrents. Pour Cohen & Squire (1984), la ME est supportÉe par une M DECLARATIVE , syst qui est en jeu dans la formation de nouvelles reprÉsentations. La MI repose sur un syst PROCEDURAL dans lequel la M se manifeste par des modifications on line de procÉdures ou opÉrations de traitement. Le syst de M Épisodique est vu comme la base pour le souvenir explicite d'evts rÉcents tandis que la M sÉmantique est responsable des perfces sur des tests de MI. Chacune de ces approches est conforme ˆ certaines des donnÉes recueillies mais pas ˆ d'autres. (shrink)

A modified Young double-slit experiment proposed by Wootters and Zurek is considered in which a system P of parallel plates covered with a photographic emulsion has been set up in the region where we would normally expect the central interference fringes. Because under certain conditions P makes it possible to conclude with much more than50% certainty through which of the two slits each particular photon passed, the relevant interference pattern becomes blurred. It is proved that this implies a (...) retroactive effect because the setup of P and the interaction of photons with P appear to influence the momentum transferred to the photons by the edges of the slits at an earlier stage of the experiment. (shrink)

We abandon as redundant the assumption that there exists something more in the physical world than action quanta, which constitute the atoms of the events of which the four-dimensional world consists. We derive metric, energy, matter, etc., from action and the structure formed by the quanta. In the microworld thequantization of space so introduced implies deviations from conventional metrics that make it possible in particular to explain nonlocality. The uncertainty relations, then, in conjunction with the action-based metric, appear to play (...) an essential role in making direct physical contact between emission and absorption events (i.e., retroactivity) possible, which concretely answers Bohr's conjecture that microprocesses constitute “wholes.” All of this appears to afford a realistic explanation of wave-particle “duality,” the EPR and other quantum paradoxes, the hidden variable problem, the “collapse” of wave packets, and the wave interference mechanism with the ¦ ϕ ¦2 rule. (shrink)

This article examines the concepts of retrospective and retroactive—both forms of ex post facto—law. It shows that although the distinction between retrospective and prospective law is difficult to draw (given that laws generally alter rights), the classification of particular laws as retrospective is not arbitrary, since the proposition that only some legal rules interfere with “vested” rights is, while vague, not meaningless. Retroactive legislation is recognized to attract a long list of objections. The article seeks to identify and (...) assess those objections, and to provide a comprehensive account of the various possible (if invariably limited) justifications for retroactivity. The conclusion offers some brief reflections on why the complaint that a law operates ex post facto is less likely to be directed at a judicial decision than at a statute. (shrink)

The topic of instrumentalism has engaged many scholars of contemporary educational thought. One can distinguish the positions of anti-instrumentalism from those that stress noninstrumental values of education, both conceived in the context of neoliberal/neoconservative and consumption-driven reality. In this text, Maria Mendel enters into this engagement from the perspective of the current political consumption of memory. While taking up the problem of the role public pedagogy plays in contemporary nation-states — especially in the current turn toward the past — Mendel (...) focuses on both educational and sociopolitical issues in the context of what she calls “retroactive instrumentalism.” When return to the past is the “principle of the contemporary,” she argues, instrumentalism does not necessarily result from intentional planning ex ante. If education is broadly understood as a practice of public space formation, it may be composed of experiences that do not have to be “traditionally” purposeful and oriented toward the future. They may gain their instrumental character ex post. To illustrate this possibility, Mendel analyzes snippets of Polish reality concerning the construction of “the good nation.” Many of the elements of public pedagogy in this case contain unifications that pertain directly to the instrumental character of the learning experiences employed by a society as it transforms into a nation. The instrumentalism of those elements is discovered post factum. In its ontological dimension, then, education may gain or solidify its instrumental character ex post. Based on the analysis proposed in this text, one could say that when instrumentality is retroactive, it becomes displaced intentionality — that is, it provides an instrumental story that disguises the intentions of the one writing the narrative. Mendel concludes by using the Aristotelian notion of phantasia, which regards “being without a matter,” to encourage productive thought about how to create public narratives that are free of instrumentalism. This grounds a version of public pedagogy that is oriented toward the animation of people's active imagining and thus becoming public. By epistemologically shifting learning into a public space, such public pedagogy serves to recultivate society and humanity as plurality, diversity, and coproduction of the public. (shrink)

This paper deals with the phenomenon of retroactive continuity, or retcon for short, in which the truth-value of a proposition in an established fictional work is changed later. The primary aim of this paper is to provide the most compelling explanation for retroactive continuity. I first defend the metaphysical view about fiction, according to which when retconning occurs, a fictional work changes its property of containing a proposition while preserving its identity. I then argue that this view is (...) theoretically preferable to all other competing approaches. (shrink)

This article discusses three recent philosophers who speak in different ways about the retroactive construction of reality by human knowledge. Bruno Latour unapologetically claims that the Egyptian Pharaoh Ramses II could not have died of tuberculosis, as determined by a team of French doctors in 1976, since this disease was not discovered until three thousand years after his death. Slavoj Žižek often makes comparable arguments, though his version of retroactivity draws on both psychoanalysis and dialectics in a way that (...) is never the case for Latour. Yet in his 2012 book Less Than Nothing, Žižek takes the more prudent, realist-sounding line that changes in scientific theories do not change nature itself. The real novelty in retroactive theories is provided by Thomas Kuhn, who draws our attention to a grey temporal zone in scientific discovery in which it is impossible to pinpoint the exact date of any breakthrough. For Kuhn, this stems from a dualism found in reality itself: one between the fact “that” a thing exists and the determination of “what” its properties are. The tension between these two moments is responsible for much of the vagueness and drama surrounding any paradigm shift in the sciences and is closely related to at least one plausible theory of metaphor. In closing, three Hollywood films are cited as helpful examples for understanding the different ways in which a paradigm shift works its retroactive magic. (shrink)

The paper offers a reconstruction of the logics of jazz improvisation that is drawing on Žižek’s Work on Hegel. A basic concept of Žižek’s reading of Hegel consists in the concept of Retroactivity as the temporality that is characteristic of what Hegel understands as the development of history. The logic of retroactivity cannot be understood in terms of a classical teleological account but rather draws upon the idea of incommensurable events: Each historical situation is presupposing its own preconditions in a (...) way that the contingent is transformed into necessity. The paper discusses the structure of the temporality of jazz in such a way that it can be informed by Žižek’s thoughts on the temporal logic of history. (shrink)