More than two decades of work in vision posits the existence of dual-learning systems of category learning. The reflective system uses working memory to develop and test rules for classifying in an explicit fashion, while the reflexive system operates by implicitly associating perception with actions that lead to reinforcement. Dual-learning systems models hypothesize that in learning natural categories, learners initially use the reflective system and, with practice, transfer control to the reflexive system. The role of reflective and reflexive systems in (...) auditory category learning and more specifically in speech category learning has not been systematically examined. In this article, we describe a neurobiologically constrained dual-learning systems theoretical framework that is currently being developed in speech category learning and review recent applications of this framework. Using behavioral and computational modeling approaches, we provide evidence that speech category learning is predominantly mediated by the reflexive learning system. In one application, we explore the effects of normal aging on non-speech and speech category learning. Prominently, we find a large age-related deficit in speech learning. The computational modeling suggests that older adults are less likely to transition from simple, reflective, unidimensional rules to more complex, reflexive, multi-dimensional rules. In a second application, we summarize a recent study examining auditory category learning in individuals with elevated depressive symptoms. We find a deficit in reflective-optimal and an enhancement in reflexive-optimal auditory category learning. Interestingly, individuals with elevated depressive symptoms also show an advantage in learning speech categories. We end with a brief summary and description of a number of future directions. (shrink)

In this chapter, the authors engage in a dialogue on what constitutes mathematical practice from pre-Socratic Greeks onto the advent of natural philosophy. The conversation occurred through dialogues between the authors over the period 2016–2019. A coda with relevant content from the Origins section is provided.

This book presents the historical account of its teachers. To make the reading easy and intelligible its technical terms are explained. The book also explains how PRATYABHIJNA system was formulated and developed by the great teachers.

Festschrift in honor of 60th birtha anniversary of Ganesh Umakant Thite, Sanskritist; comprises contributed articles on various aspects of Vedic literature, Hinduism and Indic philosophy.

This paper uses autocatalytic networks to model discontinuous cultural transitions involving cross-domain transfer, using as an illustrative example, artworks inspired by the oldest-known uncontested example of figurative art: the carving of the Hohlenstein-Stadel Löwenmensch, or lion-human. Autocatalytic networks provide a general modeling setting in which nodes are not just passive transmitters of activation; they actively galvanize, or “catalyze” the synthesis of novel nodes from existing ones This makes them uniquely suited to model how new structure grows out of earlier structure, (...) i.e., cumulative, generative network growth. They have been used to model the origin and early evolution of biological life, and the emergence of cognitive structures capable of undergoing cultural evolution. We conducted a study in which six individual creators and one group generated music, prose, poetry, and visual art inspired by the Hohlenstein-Stadel Löwenmensch, and answered questions about the process. The data revealed four through-lines by which they expressed the Löwenmensch in an alternative art form: lion-human hybrid, subtracting from the whole to reveal the form within, deterioration, and waiting to be found with a story to tell. Autocatalytic networks were used to model how these four spontaneously derived through-lines form a cultural lineage from Löwenmensch to artist to audience. We used the resulting data from three creators to model the cross-domain transfer from inspirational source to creative product. These four spontaneously-generated threads of cultural continuity formed the backbone of this Löwenmensch-inspired cultural lineage, enabling culture to evolve even in the face of discontinuity at the level conventional categories or domains. We know of no other theory of cultural evolution that accommodates cross-domain transfer or other forms of discontinuity. The approach paves the way for a broad scientific framework for the origins of evolutionary processes. (shrink)

A generator program for a computable function (by definition) generates an infinite sequence of programs all but finitely many of which compute that function. Machine learning of generator programs for computable functions is studied. To motivate these studies partially, it is shown that, in some cases, interesting global properties for computable functions can be proved from suitable generator programs which cannot be proved from any ordinary programs for them. The power (for variants of various learning criteria from the literature) of (...) learning generator programs is compared with the power of learning ordinary programs. The learning power in these cases is also compared to that of learning limiting programs, i.e., programs allowed finitely many mind changes about their correct outputs. (shrink)

In today’s competitive environments, a growing number of firms are establishing their presence through the Web sites. Based on Steuer’s and Rheingold’s arguments on perceptual experience in the virtual space, this paper provides a theoretical framework that highlights the effects of interactivity, immersion, and association for customers. The paper argues that though interactivity, immersion, and association are critical for attracting customers on a Web site, these characteristics may also lead to social, ethical and privacy concerns among customers that many unscrupulous (...) firms tend to exploit for their advantages. Interactivity has been measured through speed, range, and significance of interactivity. Immersion has been measured through breadth and depth of immersion. Association has been categorized into one‐to‐one or many‐to‐many relationships. Four Web sites, amazon.com, eBay.com, schwab.com, and victoriasecret.com, are analyzed with respect to interactivity, immersion, and association. The implications of the use and abuse of interactivity, immersion, and association are discussed. (shrink)

This paper deals with issues related to character building and human values, both in personal and work life. The focus of the author is value-centred management, which has been discussed along two aspects of the human self, that is, the micro self and macro self. Here, the author tries to highlight the importance of both 'selves' in the organizational context. In the concluding part of the paper the author presents the authenticity of Kautilya's views on the macro self in the (...) context of the present business scenario. The author attempts to portray the transition created by the market economy, which cannot provide an exclusively painless solution. Moreover, he advocates culturing of self-discipline in corporate life, which can bring about qualitative improvement, both in work and personal life. 'Work with integrity and serve with love' is the philosophy the author presents in this paper. (shrink)

Volume 20, Issue 7, July 2020, Page 190-192.

The motivation of someone who is locked-in, that is, paralyzed and mute, is to find relief for their loss of function. The data presented in this report is part of an attempt to restore one of those lost functions, namely, speech. An essential feature of the development of a speech prosthesis is optimal decoding of patterns of recorded neural signals during silent or covert speech, that is, speaking “inside the head” with output that is inaudible due to the paralysis of (...) the articulators. The aim of this paper is to illustrate the importance of both fast and slow single unit firings recorded from an individual with locked-in syndrome and from an intact participant speaking silently. Long duration electrodes were implanted in the motor speech cortex for up to 13 years in the locked-in participant. The data herein provide evidence that slow firing single units are essential for optimal decoding accuracy. Additional evidence indicates that slow firing single units can be conditioned in the locked-in participant 5 years after implantation, further supporting their role in decoding. (shrink)

BackgroundConventionally, transcranial direct current stimulation (tDCS) aims to focalize the current reaching the target region-of-interest (ROI). The focality can be quantified by the dose-target-determination-index (DTDI). Despite having a uniform tDCS setup, some individuals receive focal stimulation (high DTDI) while others show reduced focality (“non-focal”). The volume of cerebrospinal fluid (CSF), gray matter (GM), and white matter (WM) underlying each ROI govern the tDCS current distribution inside the brain, thereby regulating focality.AimTo determine the regional volume parameters that differentiate the focal and (...) non-focal groups.MethodsT1-weighted images of the brain from 300 age-sex matched adults were divided into three equal groups- (a) Young (20 ≤ × < 40 years), (b) Middle (40 ≤ × < 60 years), and (c) Older (60 ≤ × < 80 years). For each group, inter and intra-hemispheric montages with electrodes at (1) F3 and right supraorbital region (F3-RSO), and (2) CP5 and Cz (CP5-Cz) were simulated, targeting the left- Dorsolateral Prefrontal Cortex (DLPFC) and -Inferior Parietal Lobule (IPL), respectively. Both montages were simulated for two current doses (1 and 2 mA). For each individual head simulated for a tDCS configuration (montage and dose), the current density at each region-of-interest (ROI) and their DTDI were calculated. The individuals were categorized into two groups- (1) Focal (DTDI ≥ 0.75), and (2) Non-focal (DTDI < 0.75). The regional volume of CSF, GM, and WM of all the ROIs was determined. For each tDCS configuration and ROI, three 3-way analysis of variance was performed considering- (i) GM, (ii) WM, and (iii) CSF as the dependent variable (DV). The age group, sex, and focality group were the between-subject factors. For a given ROI, if any of the 3 DV’s showed a significant main effect or interaction involving the focality group, then that ROI was classified as a “focal ROI.”ResultsRegional CSF was the principal determinant of focality. For interhemispheric F3-RSO montage, interaction effect (p < 0.05) of age and focality was observed at Left Caudate Nucleus, with the focal group exhibiting higher CSF volume. The CSF volume of focal ROI correlated positively (r ∼ 0.16, p < 0.05) with the current density at the target ROI (DLPFC). For intrahemispheric CP5-Cz montage, a significant (p < 0.05) main effect was observed at the left pre- and post-central gyrus, with the focal group showing lower CSF volume. The CSF volume correlated negatively (r ∼ –0.16, p < 0.05) with current density at left IPL. The results were consistent for both current doses.ConclusionThe CSF channels the flow of tDCS current between electrodes with focal ROIs acting like reservoirs of current. The position of focal ROI in the channel determines the stimulation intensity at the target ROI. For focal stimulation in interhemispheric F3-RSO, the proximity of focal ROI reserves the current density at the target ROI (DLPFC). In contrast, for intrahemispheric montage (CP5-Cz), the far-end location of focal ROI reduces the current density at the target (IPL). (shrink)

This article investigates the effect of perceived uncertainty on two types of screening strategies – exclusion and inclusion. Results from five studies showed that perceived uncertainty inc...

The Novelty-Seeking Model does not address the iterative nature of creativity, and how it restructures one's worldview, resulting in overemphasis on the role of curiosity, and underemphasis on inspiration and perseverance. It overemphasizes the product; creators often seek merely to express themselves or figure out or come to terms with something. We point to inconsistencies regarding divergent and convergent thought.

L’œuvre du Péruvien José Carlos Mariátegui place au cœur de ses analyses les catégories de praxis et de lutte des classes. Pour ce faire, il intègre de manière originale un marxisme de tradition historiciste. Cet article revient dans un premier temps sur les questions qui traversent ce courant, pour ensuite opérer une revue de la réception du terme historicisme dans les textes de Mariátegui. Dans un troisième temps, il propose de relire sa proposition stratégique révolutionnaire à l’aune d’une mobilisation des (...) catégories de tradition, de mythe et d’histoire. (shrink)

This book introduces readers to Indian philosophy by presenting the first integral English translation of Vaiśeṣikasūtra with the earliest extant commentary of Candrānanda on the old aphorisms of Vaiśeṣika school of Indian philosophy. The book offers a comprehensive description of the fundamental categories of ontology and metaphysics, among which the category of 'particularity' plays a major role in the 'problem of individuation' of 'substance' and 'nature' in both Indian and Western metaphysics. The book should be read primarily in relation to (...) Aristotle's Categories and is structured in three parts. Part 1 contains a general introduction to Indian philosophy and the Vaiśeṣika system. Part 2 is a textual-philological discussion on the commentary itself, since its first publication in 1961 by Muni Jambūvijayaji up until the present day. Part 3 is a philosophical translation that reads Vaiśeṣika in the global context of Comparative Philosophy and makes the text accessible to all philosophy readers interested in ontology and metaphysics. A new reference work and a fundamental introduction to anyone interested in Indian and Comparative Philosophy, this book will be of interest to academics and students in the field of Classical Studies, Modern Philosophy and Asian Religions and Philosophies. (shrink)

Consumers of software often face an acquisition-mode decision, namely whether to purchase or pirate that software. In terms of consumer welfare, consumers who pirate software may stand in opposition to those who purchase it. Marketers also face a decision whether to attempt to thwart that piracy or to ignore, if not encourage it as an aid to their software's diffusion, and policymakers face the decision whether to adopt interventionist policies, which are government-centric, or laissez faire policies, which are marketer-centric. Here (...) in order to assess the decision-making of all three of these stakeholders, we focus on the consumer's point-of-view as central and examine it by considering on a comparative basis the ethical dimension versus other dimensions, including economic, legal, and other salient consumer behavior considerations. Based on a survey of 689 software consumers conducted over the Internet, the results indicate that ethics as a factor is embedded in a multidimensional set of determinant factors influencing software piracy, including attitudes, legal aspects, social support, perceptions of economic loss and age. Policy and research implications, based on these findings, are provided. (shrink)

A Volume in Cognition, Equity & Society: International Perspectives formally known as International Perspectives on Mathematics Education - Cognition, Equity & Society Series Editor Bharath Sriraman, The University of Montana and Lyn English, Queensland University of Technology The diversity of research in mathematics education has been addressed as both, a problem and a strength. When manifested through adherence to different intellectual roots and theoretical orientations, diversions constitute 'refractions' of mathematics education. The collection and analysis of empirical data in a (...) study are by necessity refracted through the specific analytical lens employed, as well as the aim of the study itself. Refractions can also refer to looking at old phenomena through new lenses. The chapters in this book are refracted through philosophical, political, mathematical and personal lenses by distinguished authors in the field, addressing issues about the elusive experience of doing mathematics, purification of texts, refractions, mathematics and ethnomathematics, political messages in textbook tasks, mathematics education policy debate, the political in mathematics education research, philosophy and mathematics, meanings and representations, identity of mathematical modeling, and dilemmas in the teaching of calculus. An ancient Sanskrit adage states that Knowledge is something that grows when shared, but shrinks when hoarded. Academics engaged in the generation of new Knowledge are blessed with both the time and the freedom to engage in pursuits that allow for intellectual pleasure. As a phenomenon of the Zeitgeist many have succumbed to the increased corporatization of academic work, engaging in activities for monetary and self advancement purposes. Are there any real intellectuals left in academia, a l Adorno, Bourdieu, Chomsky, Foucault, among others? This Festschrift is dedicated to academics that don't bother with self promotion or aggrandizement of themselves or their ideas in simplistic terms. (shrink)

Enabling constraints are bottom up causes which create the possibility of the existence of a system. Disabling constraints reduce the degrees of freedom and narrow the choices of the system which are structural, functional, meaningful relations that assign executive roles to the component parts. In this paper, we discuss causality as enabling and disabling constraints in order to critique the absurdity of transitivity in causal relations. If downward causation is viewed as causation by constraints, we argue that it will not (...) face the absurdity of self-causation which is incurred because of the transitivity principle. In the process of self-organization, organizationally new structures are created from the lower level subcomponents of the system. Such self-organizing systems can be broadly considered as sui-generis and transcend the transitivity principle by causally influencing its subcomponents. These higher level systemic constraints that causally influence the components in a self-organizing system without violating any physical laws via causal constraints are termed as Downward Causation. (shrink)

This article discusses the importance of ‘public conscience’ in B. R. Ambedkar’s political thought. Ambedkar consistently defended public conscience as a democratic value in his writings and speeches. Public conscience referred to collective responsibility, social justice and the public deliberation of what constitutes the social good. Ambedkar consistently expressed the unequivocal belief that public conscience would bring about a moral transformation in Indian society through a collective ethical stance against all forms of social oppression. He conceptualized public conscience as a (...) method by which a democratic and ethical Indian society could come about and flourish. This article interrogates his ideas concerning public conscience through a detailed reading of his works, focusing particularly on his 1943 speech, Ranade, Gandhi and Jinnah. (shrink)

Logopenic variant primary progressive aphasia is a neurodegenerative language disorder primarily characterized by impaired phonological processing. Sentence repetition and comprehension deficits are observed in lvPPA and linked to impaired phonological working memory, but recent evidence also implicates impaired speech perception. Currently, neural encoding of the speech envelope, which forms the scaffolding for perception, is not clearly understood in lvPPA. We leveraged recent analytical advances in electrophysiology to examine speech envelope encoding in lvPPA. We assessed cortical tracking of the speech envelope (...) and in-task comprehension of two spoken narratives in individuals with lvPPA and age-matched controls. Despite markedly reduced narrative comprehension relative to controls, individuals with lvPPA had increased cortical tracking of the speech envelope in theta oscillations, which track low-level features, but not delta oscillations, which track speech units that unfold across a longer time scale. This neural signature was highly correlated across narratives. Results indicate an increased reliance on acoustic cues during speech encoding. This may reflect inefficient encoding of bottom-up speech cues, likely as a consequence of dysfunctional temporoparietal cortex. (shrink)