Some theorists, ranging from W. James to contemporary psychologists, have argued that forgetting is the key to proper functioning of memory. The authors elaborate on the notion of beneficial forgetting by proposing that loss of information aids inference heuristics that exploit mnemonic information. To this end, the authors bring together 2 research programs that take an ecological approach to studying cognition. Specifically, they implement fast and frugal heuristics within the ACT-R cognitive architecture. Simulations of the recognition heuristic, which relies on (...) systematic failures of recognition to infer which of 2 objects scores higher on a criterion value, demonstrate that forgetting can boost accuracy by increasing the chances that only 1 object is recognized. Simulations of the fluency heuristic, which arrives at the same inference on the basis of the speed with which objects are recognized, indicate that forgetting aids the discrimination between the objects' recognition speeds. (shrink)

Introspection is paradoxical in that it is simultaneously so compelling yet so elusive. This paradox emerges because although experience itself is indisputable, our ability to explicitly characterize experience is often inadequate. Ultimately, the accuracy of introspective reports depends on individuals' imperfect ability to take stock of their experience. Although there is no ideal yardstick for assessing introspection, examination of the degree to which self-reports systematically covary with the environmental, behavioural, and physiological concomitants of experience can help to establish the correspondence (...) between meta-consciousness and experience. We illustrate the viability of such an approach in three domains, imagery, mind-wandering, and hedonic appraisal, identifying both the situations in which introspections appear to be accurate and those in which they seem to diverge from underlying experience. We conclude with a discussion of the various factors that may cause meta-consciousness to misrepresent experience. (shrink)

In _"Masterpiece" Studies_ Kermit Champa offers new ways to interpret modernism that have previously been closed off by the application of the reigning art-historical methodologies to the study of the modernist achievement. He focuses on four separate phenomena—Manet's last Salon painting, _Bar at the Folies-Bergèr_e;_ L'Oeuvre_, Zola's novel about the realist/impressionist movement; Van Gogh's problematic versions of a single painting, _La Berceuse_; and the immanent "series" phenomenon of Monet's work of the period. Champa reveals the importance of music, in (...) particular Wagner's music, as a paradigm for later nineteenth-century French painting. He also shows the crucial significance of the concept of the masterpiece as thematized by Zola in his novel for our understanding of certain aspects of the art of Manet, Monet, and Van Gogh. Employing postformalist methodology, the book explores the conversation between works of art produced in close succession and elaborates an aesthetic context for that conversation. Champa also shows how paintings and fictional representations of paintings can announce their points in common, and it is out of this exploration that he radically redefines what constitutes "context.". (shrink)

I denne teksten blir følgende spørsmål tatt opp til drøfting: Er det å ta medisinsk teknologi i bruk for å selektere et døvt barn mer etisk problematisk enn det motsatte; å bruke teknologien for å sikre seg et hørende barn? På bakgrunn av fire premisser konkluderer jeg med at både seleksjon for døvhet og for hørsel er tilnærmet like etisk problematisk. De fire premissene er 1) at seleksjonskriteriet sykdom eller skade bør erstattes av autentisitetsbetraktninger, 2) at døve og hørende har (...) samme potensial for autentisk livsutfoldelse, selv om det ikke kan avvises at døvhet kjennetegnes ved manglende hørsel, 3) at seleksjon innebærer fravalg av liv som har autentisk potensialitet enten som døv eller hørende, og 4) at dette fravalget involverer en etisk kostnad. Konklusjonen har enkelte andre implikasjoner og en restproblematikk som belyses avslutningsvis. (shrink)

Given that as much as half of human thought arises in a stimulus independent fashion, it would seem unlikely that such thoughts would play no functional role in our lives. However, evidence linking the mind-wandering state to performance decrement has led to the notion that mind-wandering primarily represents a form of cognitive failure. Based on previous work showing a prospective bias to mind-wandering, the current study explores the hypothesis that one potential function of spontaneous thought is to plan and anticipate (...) personally relevant future goals, a process referred to as autobiographical planning. The results confirm that the content of mind-wandering is predominantly future-focused, demonstrate that individuals with high working memory capacity are more likely to engage in prospective mind-wandering, and show that prospective mind-wandering frequently involves autobiographical planning. Together this evidence suggests that mind-wandering can enable prospective cognitive operations that are likely to be useful to the individual as they navigate through their daily lives. (shrink)

Stimulation of mitogenesis by the epidermal growth factor (EGF) operates through a pathway involving the receptor, the small G‐protein Ras and protein kinases of the MAP kinase cascade. It is proposed that two of the critical steps of that pathway utilize localization of components to the plasma membrane where Ras is located: recruitment of the nucleotide exchange protein Sos to the phosphorylated EGF receptor via a complex with the SH2/SH3‐containing protein Grb2 and recruitment of the protein kinase Raf to activated (...) Ras. Moreover, it is then proposed that Raf associates with the cytoskeleton at the membrane as it is being activated. Other signaling elements, including class I receptor kinases, nonreceptor tyrosine kinases and tyrosine phosphatases, are known to function at specific cellular sites. These observations have led us to propose that localization of signaling components, and particularly sites at membrane‐microfilament interfaces, play critical roles in cellular regulation. (shrink)

This review identifies some of the many layers that surround and potentially obscure the emotionally charged topic of recovered accounts of childhood abuse. Consideration of the, admittedly often indirect, evidence provides suggestive support for many of the components of both recovered and fabricated memories of abuse. With respect to recovered memories the available evidence suggests that: although the prior accessibility of a memory may be difficult to determine, recovered memory reports can sometimes be corroborated with respect to their correspondence to (...) actual abuse; although individuals often retain memory for trauma, there is evidence for fluctuations in the accessibility of traumatic experiences, particularly for situations that are extremely difficult to talk about; there are compelling mechanisms available to account for both the decreases and the subsequent increases in accessibility of traumatic memories that could lead to recovered memory reports. With respect to fabricated memories the available evidence suggests that: people are highly capable of fabricating vivid recollections that can be confused with reality; once fabricated, there seems to be no limit to the preposterous false memories that some individuals are capable of accepting particularly when in the presence of a persuasive individual in a position of authority. Although future research is needed to provide more direct evidence for the above claims, at present readers are urged to consider the strong likelihood that both recovered and fabricated memories correspond to real phenomena. (shrink)

ABSTRACT Although Kairos in Greek mythology is often depicted as the winged son of Zeus who grants to those who lay hold of his single lock of hair their once-in-a-lifetime opportunity, in traditional African American culture, particularly when it comes to speech, Kairos is essentially family. Given how much African American speakers depend on seizing the moment to invoke spiritual connections, emit laughter, and profess the truth, Kairos, or what we might call CPT (“Colored People’s Time”), can be summoned almost (...) at will. One of the African American discourses this article will use to illustrate this point is Call and Response, a verbal exchange in which speakers and listeners attune to one another and to the timeliness of an event. Martin Luther King Jr.’s “I Have a Dream” speech was such an event, but it wouldn’t have been so were it not for the timely responding of his favorite gospel singer, Mahalia Jackson. (shrink)

Current accounts suggest that self-referential thought serves a pivotal function in the human ability to simulate the future during mind-wandering. Using experience sampling, this hypothesis was tested in two studies that explored the extent to which self-reflection impacts both retrospection and prospection during mind-wandering. Study 1 demonstrated that a brief period of self-reflection yielded a prospective bias during mind-wandering such that participants’ engaged more frequently in spontaneous future than past thought. In Study 2, individual differences in the strength of self-referential (...) thought — as indexed by the memorial advantage for self rather than other-encoded items — was shown to vary with future thinking during mind-wandering. Together these results confirm that self-reflection is a core component of future thinking during mind-wandering and provide novel evidence that a key function of the autobiographical memory system may be to mentally simulate events in the future. (shrink)

Peirce’s system may be identified as one of a family of “organic memory” theories which flourished during the period in which he developed it, especially in the Monist journals which published much of his late work. “Organic memory” theories were vigorously opposed in their own day and are remembered in our own, if at all, only in connection with discredited theories such as racial memory and Lamarckian inheritance. When read in the context of their own time, however, “organic memory” theories (...) stand revealed as among modernity’s first attempts at a still-unrealized, post-nominalist re-foundation of science. Being thus closely related to Peirce’s own project both in time and in spirit, they deserve to be understood on their own terms. The synthesis of these theories in the book Das Gesetz der Serie (1919) by the Austrian biologist Paul Kammerer (1880-1926), a prominent representative of organized Monism's European branch, provides insight into the systematic unity of the various aspects of Peirce's thought, especially the close relationship between pragmatism and what is now called “emergence.”. (shrink)

The neuregulin gene encodes a series of polypeptide growth factors that can influence the growth state of target vertebrate cells in culture. Recently, three studies have explored the in vivo function of the neuregulin signaling system in mice by disrupting the genes encoding the neuregulin ligand(1) and two of its receptors, ErbB2(2) and ErbB4(3). Each of the genes is essential for development, and aberrations in cardiac and neural development are particularly prominent in mutant embryos. The observed defects, together with the (...) localization of expression of the neuregulin signaling components within these tissues, highlight a paracrine mechanism for neuregulin‐mediated intercellular communication. (shrink)

MUC1 and MUC4 are the two membrane mucins that have been best characterized. Although they have superficially similar structures and have both been shown to provide steric protection of epithelial surfaces, recent studies have also implicated them in cellular signaling. They act by substantially different mechanisms, MUC4 as a receptor ligand and MUC1 as a docking protein for signaling molecules. MUC4 is a novel intramembrane ligand for the receptor tyrosine kinase ErbB2/HER2/Neu, triggering a specific phosphorylation of the ErbB2 in the (...) absence of other ErbB ligands and potentiating phosphorylation and signaling through the ErbB2/ErbB3 heterodimeric receptor complex formed in the presence of neuregulin. In contrast, MUC1 has a highly conserved cytoplasmic tail, which binds β‐catenin, a key component of adherens junctions and a regulator of transcription, in a process that is tightly regulated by MUC1 phosphorylation. The specific localization of these membrane mucins to the apical surfaces of epithelial cells suggests that their signaling functions may be important as sensor mechanisms in response to invasion or damage of epithelia. BioEssays 25:66–71, 2003. © 2002 Wiley Periodicals, Inc. (shrink)

O‐glycosylation is the post‐translational process whereby carbohydrate is added to hydroxylated amino acids of proteins. The major O‐glycosylation pathway in animal cells is involved in the synthesis of oligosaccharides linked by N‐acetylgalactosamine to serine or threonine residues in ‘mucin‐type’ proteins or their analogs. In this review, we discuss the evidence for the cellular localization of the biosynthetic steps in this pathway and propose a simplified, consensus version. We also propose variations of the simple pathway to account for its heterogeneity and (...) variability in different cell types and differentiation states. (shrink)

Microfilament interactions with the plasma membranes of animal cells appear to vary with cell type and localization. In the erythrocyte, actin oligomers are associated with the membrane via spectrin and ankyrin. The ends of stress fibers in cultured cells, such as fibroblasts, are attached to the plasma membrane at focal adhesion sites and may involve the protein vinculin as a linking protein. In intestinal brush border microvilli a 110,000 dalton protein links the microfilament bundles to sites on the microvillus. A (...) transmembrane complex containing actin stably associated with a cell surface glycoprotein can be isolated from ascites tumor cell microvilli and can be obtained still associated with microfilaments by gentle extraction and gradient centrifugation of the microvilli. These varied interaction mechanisms are believed to be needed to satisfy the different structural and dynamic requirements of the particular systems. (shrink)

While agreeing with Rose's reasoning about why the causes of organisms' behaviors cannot be reduced to the solely biological and molecular, this review questions Rose's uses of the terms “determinism” and “contingency”; his occasional seemingly cavalier acceptance as fact of unproven hypotheses about social and psychological phenomena; and his general disdain for the psychometric tradition and its causal modeling extensions.

We all have had convictions that we were unable to substantiate on a purely logical basis. Such intuitive experiences have intrigued philosophers for centuries, although the construct of intuition as such has generally been given an undeserved cold shoulder by researchers. As Peugeot, in this issue, observes, ‘It is therefore very surprising that so few studies have been dedicated to the study of the subjective experience which is associated with it’ . Peugeot is correct in her observation that modern research (...) has had little to say explicitly about intuition and its subjective concomitants. However, this omission may be as much a matter of terms as it is of fact. Specifically, if we consider the definition of intuition we see that a considerable amount of research that has been called by other names, actually reveals important insights into both the cognitive processes that lead to intuition and the subjective experiences associated with it. Moreover, because this research explicitly relates subjective experiences to more objective measures and methodologies, it circumvents a central criticism that can be levelled against the first-person phenomenological methodology used by Peugeot; namely that it may not reflect underlying processes, nor even necessarily the subjective experiences that it purports to measure. (shrink)

In recent years, the number of studies examining mind wandering has increased considerably, and research on the topic has spread widely across various domains of psychological research. Although the term “mind wandering” has been used to refer to various cognitive states, researchers typically operationalize mind wandering in terms of “task-unrelated thought” (TUT). Research on TUT has shed light on the various task features that require people’s attention, and on the consequences of task inattention. Important methodological and conceptual complications do persist, (...) however, in current investigations of TUT. As we argue, these complications may be dampening the development of a more nuanced scientific account of TUT. Here, we outline three of the more prominent methodological and conceptual complications in the literature on TUT, and we discuss potential directions for researchers to take as they move forward in their investigations of TUT. (shrink)

This chapter presents two models of priming. The primary task under consideration is the identification of words presented visually at threshold. The first model, REMI, is a model for long-term priming in implicit memory. It explains repetition priming effects by assuming that during study of a word some contextual information is added to the corresponding lexical trace. This contextual information stored during the study task will tend to match the contextual information present during the test task, leading subjects to prefer (...) studied words over non-studied words. The second model, ROUSE, is a model of short-term priming. ROUSE stands for Responding Optimally with Unknown Sources of Evidence, and it is able to explain an intricate pattern of results. (shrink)

According to the attentional resources account, mind wandering (or “task-unrelated thought”) is thought to compete with a focal task for attentional resources. Here, we tested two key predictions of this account: First, that mind wandering should not interfere with performance on a task that does not require attentional resources; second, that as task requirements become automatized, performance should improve and depth of mind wandering should increase. Here, we used a serial reaction time task with implicit- and explicit-learning groups to test (...) these predictions. Providing novel evidence for the attentional resource account’s first prediction, results indicated that depth of mind wandering was negatively associated with learning in the explicit, but not the implicit, group, indicating that mind wandering is associated with impaired explicit, but not implicit, learning. Corroborating the attention resource account’s second prediction, we also found that, overall, performance improved while at the same time depth of mind wandering increased. From an implicit learning perspective, these results are consistent with the claim that explicit learning is impaired under attentional load, but implicit learning is not. (shrink)