The present study examined the relationship between left–right discrimination (LRD) performance and handedness, sex and cognitive abilities. In total, 31 men and 35 women – with a balanced ratio of left-and right-handers – completed the Bergen Left–Right Discrimination Test. We found an advantage of left-handers in both identifying left hands and in verifying “left” propositions. A sex effect was also found, as women had an overall higher error rate than men, and increasing difficulty impacted their reaction (...) time more than it did for men. Moreover, sex interacted with handedness and manual preference strength. A negative correlation of LRD reaction time with visuo-spatial and verbal long-term memory was found independently of sex, providing new insights into the relationship between cognitive skills and performance on LRD. (shrink)

Left-libertarianism, like the more familiar right-libertarianism, holds that agents initially fully own themselves. Unlike right-libertarianism, however, it views natural resources as belonging to everyone in some egalitarian manner. Left-libertarianism is thus a form of liberal egalitarianism. In this article, I shall lay out the reasons why (1) left-libertarianism holds that (a) private discrimination is not intrinsically unjust and (b) it is intrinsically unjust for the state to prohibit private discrimination, and (2) that, nonetheless, a plausible version of left-libertarianism (...) holds that it is unjust for the state (and many private individuals) to take no steps to offset the negative effects of systematic private discrimination. The basic line is not new. It is simply that there is nothing unjust in principle with private discrimination, but there is (at least typically) something unjust about doing nothing to promote equal life prospects. (shrink)

Members of the field of philosophy have, just as other people, political convictions or, as psychologists call them, ideologies. How are different ideologies distributed and perceived in the field? Using the familiar distinction between the political left and right, we surveyed an international sample of 794 subjects in philosophy. We found that survey participants clearly leaned left (75%), while right-leaning individuals (14%) and moderates (11%) were underrepresented. Moreover, and strikingly, across the political spectrum, from very left-leaning individuals and moderates to (...) very right-leaning individuals, participants reported experiencing ideological hostility in the field, occasionally even from those from their own side of the political spectrum. Finally, while about half of the subjects believed that discrimination against left- or right-leaning individuals in the field is not justified, a significant minority displayed an explicit willingness to discriminate against colleagues with the opposite ideology. Our findings are both surprising and important, because a commitment to tolerance and equality is widespread in philosophy, and there is reason to think that ideological similarity, hostility, and discrimination undermine reliable belief formation in many areas of the discipline. (shrink)

Social and political concepts are indispensable yet historically and culturally variable in a way that poses a challenge: how can we reconcile confident commitment to them with awareness of their contingency? In this article, we argue that available responses to this problem—Foundationalism, Ironism, and Right Wittgensteinianism—are unsatisfactory. Instead, we draw on the work of Bernard Williams to tease out and develop a Left Wittgensteinian response. In present-day pluralistic and historically self-conscious societies, mere confidence in our concepts is not enough. For (...) modern individuals who are ineluctably aware of conceptual change, engaged concept-use requires reasonable confidence, and in the absence of rational foundations, the possibility of reasonable confidence is tied to the possibility of critically discriminating between conceptual practices worth endorsing and those worth rejecting. We show that Left Wittgensteinianism offers such a basis for critical discrimination through point-based explanations of conceptual practices which relate them to the needs of concept-users. We end by considering how Left Wittgensteinianism guides our understanding of how conceptual practices can be revised in the face of new needs. (shrink)

Brain–machine interfaces are systems that allow the control of a device such as a robot arm through a person’s brain activity; such devices can be used by disabled persons to enhance their life and improve their independence. This paper is an extended version of a work that aims at discriminating between left and right imagined hand movements using a support vector machine classifier to control a robot arm in order to help a person to find an object in the environment. (...) The main focus here is to search for the best features that describe efficiently the electroencephalogram data during such imagined gestures by comparing two feature extraction methods, namely the continuous wavelet transform and the empirical modal decomposition, combined with the principal component analysis that were fed through a linear and radial basis function kernel SVM classifier. The experimental results showed high performance achieving an average accuracy across all the subjects of 92.75% with an RBF kernel SVM classifier using CWT and PCA compared to 80.25% accuracy obtained with EMD and PCA. The proposed system has been implemented and tested using data collected from five male subjects and it enabled the control of the robot arm in the right and the left direction. (shrink)

This article examines the formation of consciousness among women at the beginning stages of the women's movement. The author analyzes the complexity of pathways to feminism across the political spectrum, comparing women who were active on the Left in Students for a Democratic Society with women active in the leading conservative organization of the 1960s, Young Americans for Freedom. She finds an unexpected division among women in both groups between those who identify discrimination by their male peers and those (...) who do not. The author argues there are three stages in the formation of feminist consciousness: identification of inequality or mistreatment, discovering a language or framing by which to interpret these experiences, and the social construction of a collective identity. Factors for each of these three stages that help or hinder the formation of feminist consciousness are discussed. (shrink)

In their discussion paper of November 2020, Cooket alpresent a draft protocol for navigating circumstances in which emergency services are overwhelmed. Their paper suggests that COVID-related triage decisions should be based on clinical assessment, patient and family consultation, and a range of ethical considerations. In this response, we note that the protocol exhibits an ambiguity that is likely to result in irresolvable dilemmas when put into practice. This ambiguity is exemplified in the paper’s prime ethical imperative (to ‘save more lives (...) and more years of life’), which takes the form of an undefined conjunction whose practical implications are left unspecified. We see this ambiguity in the prime imperative as one manifestation of a broader set of tensions in the protocol. We show that the discipline of human rights provides an essential supplement to the ethical framework on which Cook and colleagues rely, providing a framework for understanding and working through triage dilemmas involving age, discrimination and equality. (shrink)

Rapid actions to persons holding weapons were simulated using desktop virtual reality. Subjects responded to simulated (a) criminals, by pointing the computerÕs mouse at them and left-clicking (simulated shooting), (b) fellow police officers, by pressing the spacebar (safety signal), and (c) citizens, by inaction. In one of two tasks Black males holding guns were police officers while White males holding guns were criminals. In the other, Whites with guns were police and Blacks with guns were criminals. In both tasks Blacks (...) or Whites holding harmless objects were citizens. Signal detection analyses revealed two race effects that led to Blacks being incorrectly shot at more than Whites: a perceptual sensitivity effect (when held by Blacks guns were less distinguishable from harmless objects) and a response bias effect (objects held by Blacks were more likely to be treated as guns). Ó 2003 Elsevier Science (USA). All rights reserved. (shrink)

Author argues that an emerging interest group, especially one that seeks to reverse past discrimination against its predecessors in the public arena, is entitled to enhanced consideration as a means of achieving long denied but merited rights. First this thesis is defended by identifying both practical need and theoretical support for emerging interest groups. Then these findings are applied specifically to the rights of women as an emerging interest group. (Publisher left off last word of title: 'Groups'.).

A mechanism for the generation of the morphological left‐right asymmetry in higher organisms is proposed, based on the idea that chirality at the molecular level is the primordial source for macroscopic asymmetry. This mechanism accounts for a variety of experimental results on artificial production of situs inversus and fits well with mutations in mice causing visceral transposition.

In a study concerning visual body part recognition, a “self-advantage” effect, whereby self-related body stimuli are processed faster and more accurately than other-related body stimuli, was revealed, and the emergence of this effect is assumed to be tightly linked to implicit motor simulation, which is activated when performing a hand laterality judgment task in which hand ownership is not explicitly required. Here, we ran two visual hand recognition tasks, namely, a hand laterality judgment task and a self-other discrimination task, (...) to investigate whether the self-advantage emerged even if implicit motor imagery was assumed to be working less efficiently and how individual traits [such as autistic traits and the extent of positive self-body image, as assessed via the Autism Spectrum Quotient and the Body Appreciation Scale-2, respectively] modulate performance in these hand recognition tasks. Participants were presented with hand images in two orientations [i.e., upright and upside-down ] and asked to judge whether it was a left or right hand. They were also asked to determine whether it was their own, or another person’s hand. Data collected from men and women were analyzed separately. The self-advantage effect in the hand laterality judgment task was not revealed, suggesting that only two orientation conditions are not enough to trigger this motor simulation. Furthermore, the men’s group showed a significant positive correlation between AQ scores and reaction times in the laterality judgment task, while the women’s group showed a significant negative correlation between AQ scores and differences in RTs and a significant positive correlation between BAS-2 scores and dprime in the self-other discrimination task. These results suggest that men and women differentially adopt specific strategies and/or execution processes for implicit and explicit hand recognition tasks. (shrink)

The gastrointestinal tract is an asymmetrically patterned organ system. The signals which initiate left‐right asymmetry in the developing embryo have been extensively studied, but the downstream steps required to confer asymmetric morphogenesis on the gut organ primordia are less well understood. In this paper we outline key findings on the tissue mechanics underlying gut asymmetry, across a range of species, and use these to synthesise a conserved model for asymmetric gut morphogenesis. We also discuss the importance of correct establishment of (...) left‐right asymmetry for gut development and the consequences of perturbations in this process. (shrink)

The field of left–right (LR) patterning—the study of molecular mechanisms that yield directed morphological asymmetries in otherwise symmetrical organisms—is in disarray. On one hand is the undeniably elegant hypothesis that rotary beating of inclined cilia is the primary symmetry‐breaking step: they create an asymmetric extracellular flow across the embryonic midline. On the other hand lurk many early symmetry‐breaking steps that, even in some vertebrates, precede the onset of ciliary flow. We highlight an intracellular model of LR patterning where gene (...) expression is initiated by physiological asymmetries that arise from subcellular asymmetries (e.g. motor‐protein function along oriented cytoskeletal tracks). A survey of symmetry breaking in eukaryotes ranging from protists to vertebrates suggests that intracellular cytoskeletal elements are ancient and primary LR cues. Evolutionarily, quirky effectors like ciliary motion were likely added later in vertebrates. In some species (like mice), developmentally earlier cues may have been abandoned entirely. Late‐developing asymmetries pose a challenge to the intracellular model, but early mid‐plane determination in many groups increases its plausibility. Multiple experimental tests are possible. BioEssays 29: 271–287, 2007. © 2007 Wiley Periodicals, Inc. (shrink)

Embryonic development results in animals whose body plans exhibit a variety of symmetry types. While significant progress has been made in understanding the molecular events underlying the early specification of the antero‐posterior and dorso‐ventral axes, little information has been available regarding the basis for left‐right (LR) differences in animal morphogenesis. Recently however, important advances have been made in uncovering the molecular mechanisms responsible for LR patterning. A number of genes (including well‐known signaling molecules such as Sonic hedgehog and activin) are (...) asymmetrically expressed in early chick embryos, well before the appearance of morphological asymmetries. One of these, nodal, is asymmetrically expressed in frogs and mice as well, and its expression is altered in mouse mutants exhibiting defects in laterality. In the chick, these genes regulate each other in a sequential cascade, which independently determines the situs of the heart and other organs. (shrink)

Embryonic development results in animals whose body plans exhibit a variety of symmetry types. While significant progress has been made in understanding the molecular events underlying the early specification of the antero‐posterior and dorso‐ventral axes, little information has been available regarding the basis for left‐right (LR) differences in animal morphogenesis. Recently however, important advances have been made in uncovering the molecular mechanisms responsible for LR patterning. A number of genes (including well‐known signaling molecules such as Sonic hedgehog and activin) are (...) asymmetrically expressed in early chick embryos, well before the appearance of morphological asymmetries. One of these, nodal, is asymmetrically expressed in frogs and mice as well, and its expression is altered in mouse mutants exhibiting defects in laterality. In the chick, these genes regulate each other in a sequential cascade, which independently determines the situs of the heart and other organs. (shrink)

A fundamental aspect of biological systems is their spatial organization. In development, regeneration and repair, directional signals are necessary for the proper placement of the components of the organism. Likewise, pathogens that invade other organisms rely on directional signals to target vulnerable areas. It is widely understood that chemical gradients are important directional signals in living systems. Less well recognized are electrical fields, which can also provide directional information. Small, steady electrical fields can directly guide cell movement and growth and (...) can generate chemical gradients of charged macromolecules against the leveling action of diffusion. At the site of a lesion in an ion‐transporting epithelium, for example, a substantial electrical field is instantly generated and may extend over many cell diameters. There are numerous other situations in which relatively long‐range electrical fields have been shown to exist naturally. Recently, there has been substantial progress in identifying specific processes that are controlled, to some extent, by these endogenous electrical fields. This review highlights these recent data and discusses possible mechanisms by which the fields might affect biological processes. BioEssays 25:759–766, 2003. © 2003 Wiley Periodicals, Inc. (shrink)

The prevailing theory states that either Japanese voters have stopped ideologically distinguishing parties or that the main political parties in Japan have become more centrist in recent years. These arguments are based on survey questions asking citizens to locate parties on an ideological scale. However, these questions may suffer from noise caused by respondents who misinterpret the question wording or answer the questions inappropriately to mask their misunderstanding of the terms and . To address this problem by extracting only the (...) views of those who know the meaning of leftright terminology largely perceived parties’ ideologies in the same way as experts. Additionally, I find that even these voters face difficulties in placing ambiguous or new parties on the political spectrum. This study has implications not only for understanding trends in Japanese political ideology, but also for survey design and analysis of heterogeneous survey responses. (shrink)

Multiculturalism has become a political touchstone in many countries around the world. While many of those on the right oppose it, and many of those on the left embrace it, things are not this simple. For those who defend them, multicultural policies are generally seen as key to the fair and successful integration of minorities, many of whom are immigrants, into diverse democratic societies. For those who oppose multiculturalism, who have become part of the so-called "backlash" against multiculturalism, they are (...) charged with generating segregation rather than inclusion, undermining national cultures, reinforcing difference, and privileging minority groups. Around the world, we see failing attempts at migrant integration, persistent religious intolerance and racial and ethnic discrimination, resurgent national minorities, emboldened majorities, permanent minorities, continuing social isolation, and increasing extremism, including in the form of white nationalism. But is multiculturalism the solution to these problems or does it just make them worse? In this for-and-against book, two prominent scholars of multiculturalism put forward different answers to this important question. While Patti Tamara Lenard argues for minority rights as both the consequence of a right to culture and a way to redress the effects of nation-building, Peter Balint rejects minority rights altogether, instead arguing for a re-imagined liberal neutrality. This theoretical disagreement plays out in real-world policy disagreement. Lenard, for example, argues strongly in favor of exemptions from general rules for minority cultures including the right of Sikhs to be exempt from helmet laws, and for Jews and Muslims to be exempt from bans on male circumcision. She also defends the right of minority cultures to have government-supported separate spaces. Balint, on the other hand, argues directly against these types of exemptions and government support. He is opposed to any form of differentiation based on culture, religion, or ethnicity. The book uses a wide range of real-world examples to demonstrate their significant theoretical disagreement, and to recommend very different policy proposals. (shrink)

We present behavioral lateralizations of spiders and ants and their probable survival value. They clearly conform to the vertebrate lateralizations reviewed by Vallortigara & Rogers and to earlier arthropod studies. We suggest two complementary reviews: differences in lesion susceptibility and muscle strength between left and right body side, and perceptual biases and predator inspection in invertebrates.

This book brings together for the first time an updated, revised collection of influential essays and articles that capture some of the most exciting scientific and scholarly contributions to the topic of political ideology. John Jost tackles fundamental questions about how psychology, neuroscience, and societal factors impact political attitudes and group divisions. In what sense, if any, are ordinary citizens "ideological"? Is it useful to locate political attitudes on a single dimension of representation? Are there meaningful differences in the beliefs, (...) opinions, and values of leftists and rights-or liberals and conservatives? How are personality traits related to ideological preferences? What situational or contextual factors contribute to liberal and conservative shifts in the general population? What are the implications of ideological polarization for the future of democracy? Drawing on Max Weber's concept of elective affinities, one of the world's leading political psychologists discusses the myriad ways in people choose ideas and ideas choose people. (shrink)

The internal organs of all vertebrates are asymmetrically organised across the left–right axis. The development of this asymmetry is controlled by a molecular pathway that includes the signalling molecule Nodal and the transcription factor Pitx2, proteins encoded by genes that are predominantly expressed on the left side of all vertebrate embryos studied to date. Vertebrates share Phylum Chordata with two other groups of animals, amphioxus and the urochordates (including ascidians). Both these taxa develop left–right asymmetries, and recent studies (...) have begun to address the degree of conservation of nodal and Pitx2 in this process. Pitx2 is a member of the Pitx homeobox gene family, and in both amphioxus and ascidians Pitx gene expression is predominantly left sided. These studies suggest that left–right asymmetry in all chordates is regulated by a conserved developmental pathway, and that this pathway evolved before the separation of the lineages leading to living chordates. BioEssays 24:1004–1011, 2002. © 2002 Wiley‐Periodicals, Inc. (shrink)

Disruption of Nodal in the lateral plate mesoderm (LPM) usually leads to left‐right (LR) patterning defects in multiple organs. However, whether the LR patterning of organs is always regulated in a coupled way has largely not yet been elucidated. In addition, whether other crucial regulators exist in the LPM that coordinate with Nodal in regulating organ LR patterning is also undetermined. In this paper, after briefly summarizing the common process of LR patterning, the most puzzling question regarding the initiation of (...) asymmetry is considered and the divergent mechanisms underlying the uncoupled LR patterning in different organs are discussed. On the basis of cases in which different organ LR patterning is determined in an uncoupled way via an independent mechanism or at a different time, we propose that there are other critical factors in the LPM that coordinate with Nodal to regulate heart LR asymmetry patterning during early LR patterning.Also watch the Video Abstract. (shrink)

The imagery of Left and Right has been a common way to conceive democratic politics in modern Europe, and commentators have suggested it be extended to the European Union. This article examines the normative implications and plausibility of European politics being cast in these terms. It focuses on the challenges of rendering political division recognizable and acceptable at a transnational level, of evoking its continuities of structure, and of symbolizing the ties of political community. The article probes the Left–Right (...) dichotomy’s potential in these regards, together with the conjunctural factors likely to raise or diminish its appeal. (shrink)

The situation-dependent lateralization of sympathetic electrodermal arousal during real-life stress may challenge a unitary notion of arousal, and call into question the practice of unilateral electrodermal recording, but there are broader implications. Here we consider a potential relationship between stress-induced lateralized shifts in electrodermal activity, and a theory concerning lateralized emotion-induced cardiac arrhythmia.

Imagine a child′s toy arrow, sticking by its rubber sucker to a mirror′s reflective surface. We can call the direction in which such an arrow would point the finwards direction ; and we can call the opposite direction boutwards . When we look at things in a mirror, their images are apparently just as far finwards of the mirror as the things themselves are boutwards of it. For example, if we look at the tail of our arrow and cast our (...) glance finwards, we see first the tail, then the head, then the mirror, then the reflection of the head, and finally the reflection of the tail. We can therefore say that a mirror reverses things in the finwards/boutwards dimension. Moreover, the straight line connecting each thing to its image passes perpendicularly through the plane of the mirror. Hence there is no plane, apart from that of the mirror itself, such that the apparent location of each thing′s image is just as far to the one side of that plane as the original is to the other. This means that the reversal in the finwards/ boutwards dimension is the only reversal of its kind to take place. In particular, there is no such reversal in any dimension at right angles to finwards/boutwards. (shrink)