Analysis of a diverse cross‐sample of plant‐insect interactions suggests that the abundance of vitamin C (L‐ascorbic acid, ascorbate or AsA) in plants influences their susceptibility to insect feeding. These effects may be mediated by AsAs roles as an essential dietary nutrient, as an antioxidant in the insect midgut, or as a substrate for plant‐derived ascorbate oxidase, which can lead to generation of toxic reactive oxygen species. Ascorbate can also influence the efficacy of plant defenses such as myrosinases and tannins, and (...) alter insects' susceptibility to natural enemies. Conversely, herbivores appear to influence both de novo synthesis and redox cycling of AsA in their host plants, thereby potentially altering the nutritional value of crops and their susceptibility to pests. The recent development of genetically modified crops with enhanced AsA content provides both an impetus and a tool set for further studies on the role of AsA in plant‐insect interactions. (shrink)

We can understand viewed scenes and extract task-relevant information within a few hundred milliseconds. This process is generally supported by three cortical regions that show selectivity for scene images: parahippocampal place area (PPA), medial place area (MPA) and occipital place area (OPA). Prior studies have focused on the visual information each region is responsive to, usually within the context of recognition or navigation. Here, we move beyond these tasks to investigate gaze allocation during scene viewing. Eye movements rely on a (...) scene’s visual representation to direct saccades, and thus foveal vision. In particular, we focus on the contribution of OPA, which is i) located in occipito-parietal cortex, likely feeding information into parts of the dorsal pathway critical for eye movements, and ii) contains strong retinotopic representations of the contralateral visual field. Participants viewed scene images for 1034 ms while their eye movements were recorded. On half of the trials, a 500 ms train of five transcranial magnetic stimulation (TMS) pulses was applied to the participant’s cortex, starting at scene onset. TMS was applied to the right hemisphere over either OPA or the occipital face area (OFA), which also exhibits a contralateral visual field bias but shows selectivity for face stimuli. Participants generally made an overall left-to-right, top-to-bottom pattern of eye movements across all conditions. When TMS was applied to OPA, there was an increased saccade latency for eye movements toward the contralateral relative to the ipsilateral visual field after the final TMS pulse (400ms). Additionally, TMS to the OPA biased fixation positions away from the contralateral side of the scene compared to the control condition, while the OFA group showed no such effect. There was no effect on horizontal saccade amplitudes. These combined results suggest that OPA might serve to represent local scene information that can then be utilized by visuomotor control networks to guide gaze allocation in natural scenes. (shrink)

Investigation of the Percept is a short work that focuses on issues of perception and epistemology. Its author, Dignaga, was one of the most influential figures in the Indian Buddhist epistemological tradition, and his ideas had a profound and wide-ranging impact in India, Tibet, and China. The work inspired more than twenty commentaries throughout East Asia and three in Tibet, the most recent in 2014.This book is the first of its kind in Buddhist studies: a comprehensive history of a text (...) and its commentarial tradition. The volume editors translate the root text and commentary, along with Indian and Tibetan commentaries, providing detailed analyses of the commentarial innovations of each author, as well as critically edited versions of all texts and extant Sanskrit fragments of passages. The team-based approach made it possible to study and translate a corpus of treatises in Sanskrit, Tibetan, and Chinese and to employ the methods of critical philology and cross-cultural philosophy to provide readers with a rich collection of studies and translations, along with detailed philosophical analyses that open up the intriguing implications of Dignaga's thought and demonstrate the diversity of commentarial approaches to his text.This rich text has inspired some of the greatest minds in India and Tibet. It explores some of the key issues of Buddhist epistemology: the relationship between minds and their percepts, the problems of idealism and realism, and error and misperception. (shrink)

Scientific discovery is often regarded as romantic and creative - and hence unanalyzable - whereas the everyday process of verifying discoveries is sober and more suited to analysis. Yet this fascinating exploration of how scientific work proceeds argues that however sudden the moment of discovery may seem, the discovery process can be described and modeled. Using the methods and concepts of contemporary information-processing psychology (or cognitive science) the authors develop a series of artificial-intelligence programs that can simulate the human thought (...) processes used to discover scientific laws. The programs - BACON, DALTON, GLAUBER, and STAHL - are all largely data-driven, that is, when presented with series of chemical or physical measurements they search for uniformities and linking elements, generating and checking hypotheses and creating new concepts as they go along. "Scientific Discovery examines the nature of scientific research and reviews the arguments for and against a normative theory of discovery; describes the evolution of the BACON programs, which discover quantitative empirical laws and invent new concepts; presents programs that discover laws in qualitative and quantitative data; and ties the results together, suggesting how a combined and extended program might find research problems, invent new instruments, and invent appropriate problem representations. Numerous prominent historical examples of discoveries from physics and chemistry are used as tests for the programs and anchor the discussion concretely in the history of science. Pat Langley is an Associate Professor in the Department of Information and Computer Science at the University of California, Irvine.Herbert Simon is a Professor in the Departments of Psychology, Computer Science, and Philosophy at Carnegie-Mellon University. Gary L. Bradshaw is an Assistant Professor in the Department of Psychology and Institute of Cognitive Science at the University of Colorado, Boulder. Jan M. Zytkow is an Associate Professor in the Computer Science Department at Wichita State University. (shrink)

This study examines Australian tax agents' perceptions of the ethical environment in which they practice, within the context of an income tax system based on self-assessment principles. The research identifies and ranks an inventory of ethical issues in terms of perceived frequency of occurrence and importance to Western Australian tax agents. In addition, the extent and influence of ethical concerns in the profession are evaluated.The study has determined that the most frequently cited ethical issue is the failure to make reasonable (...) enquiries where information or documentation provided by a client appears to be inaccurate or incomplete. The most important ethical problem is a failure to ensure confidentiality with regard to privileged client information. When the frequency of occurrence and importance means are compared, inadequate technical competence, failure to make reasonable enquiries/conduct research, continuing to act for a client where there is incorrect information, and conflicts in distinguishing between tax planning and tax avoidance emerge as the high frequency/high importance issues. Although acknowledging the potential for unethical actions in tax practice, Western Australian tax agents consider that they carry out their professional activities within an ethical environment. (shrink)

Le débat sur la confrontation entre Socrate et Calliclès dans le Gorgias s’est principalement concentré sur ses deux premières étapes : l’exposé par Calliclès de ses thèses et leur tentative de réfutation par Socrate (481-500), ainsi que ses tentatives subséquentes de leur substituer sa propre conception de la vie bonne (501-509). On a accordé beaucoup moins d’attention à la dernière étape (509-522). C’est pourtant celle dans laquelle Platon met en scène la discussion la plus soutenue du dialogue entre les réponses (...) concurrentes (et leurs conséquences) à ce qu’on a montré être sa question centrale : le plus grand mal est-il de commettre l’injustice ou d’en être victime? Cet article examine en détail les étapes clefs de ce débat, auquel Calliclès est à nouveau invité à participer par Socrate, après qu’il a refusé de continuer à mi-chemin de la seconde phase du parcours dialectique. La thèse défendue est que le but de Platon dans cette dernière section est de montrer exactement pourquoi et comment Socrate peut entamer et poursuivre avec succès une confrontation intellectuelle avec un jeune politicien intelligent, désireux de réussir sa carrière dans la démocratie athénienne, tel qu’a été décrit Calliclès. Il échoue à le convaincre. Mais contrairement à ce qui est parfois supposé, cela n’a rien d’un échec en termes de communication intellectuelle ; la question est de savoir plutôt quels engagements fondamentaux différents Platon cherche à nous faire distinguer. (shrink)

Despite the many well-documented similarities -- genetic, cognitive, behavioral, social -- between our human selves and our evolutionary forebears, a significant gulf remains between us and them. Why is that? How did it come about? And how did we come to be the way we are? In this book fourteen distinguished scholars -- including humanist, atheist, and theist voices -- address such questions as they explore how and when human personhood emerged. Representing various disciplines, the contributors all offer significant insights (...) into new scientific research about the origins of human nature -- research that challenges some traditional views. CONTRIBUTORS Francisco J. Ayala Justin L. Barrett Roy F. Baumeister Warren S. Brown Richard W. Byrne Matthew J. Jarvinen Malcolm Jeeves Timothy O'Connor Lynn K. Paul Colin Renfrew Ian Tattersall Anthony C. Thiselton Alan J. Torrance Adam Zeman. (shrink)

Academic dishonesty, including cheating and plagiarism, is on the rise in colleges, particularly among engineering students. While students decide to engage in these behaviors for many different reasons, academic integrity training can help improve their understanding of ethical decision making. The two studies outlined in this paper assess the effectiveness of an online module in increasing academic integrity among first semester engineering students. Study 1 tested the effectiveness of an academic honesty tutorial by using a between groups design with a (...) Time 1- and Time 2-test. An academic honesty quiz assessed participants’ knowledge at both time points. Study 2, which incorporated an improved version of the module and quiz, utilized a between groups design with three assessment time points. The additional Time 3-test allowed researchers to test for retention of information. Results were analyzed using ANCOVA and t tests. In Study 1, the experimental group exhibited significant improvement on the plagiarism items, but not the total score. However, at Time 2 there was no significant difference between groups after controlling for Time 1 scores. In Study 2, between- and within-group analyses suggest there was a significant improvement in total scores, but not plagiarism scores, after exposure to the tutorial. Overall, the academic integrity module impacted participants as evidenced by changes in total score and on specific plagiarism items. Although future implementation of the tutorial and quiz would benefit from modifications to reduce ceiling effects and improve assessment of knowledge, the results suggest such tutorial may be one valuable element in a systems approach to improving the academic integrity of engineering students. (shrink)

The human sentence processor is able to make rapid predictions about upcoming linguistic input. For example, upon hearing the verb eat, anticipatory eye-movements are launched toward edible objects in a visual scene. However, the cognitive mechanisms that underlie anticipation remain to be elucidated in ecologically valid contexts. Previous research has, in fact, mainly used clip-art scenes and object arrays, raising the possibility that anticipatory eye-movements are limited to displays containing a small number of objects in a visually impoverished context. In (...) Experiment 1, we confirm that anticipation effects occur in real-world scenes and investigate the mechanisms that underlie such anticipation. In particular, we demonstrate that real-world scenes provide contextual information that anticipation can draw on: When the target object is not present in the scene, participants infer and fixate regions that are contextually appropriate. Experiment 2 investigates whether such contextual inference requires the co-presence of the scene, or whether memory representations can be utilized instead. The same real-world scenes as in Experiment 1 are presented to participants, but the scene disappears before the sentence is heard. We find that anticipation occurs even when the screen is blank, including when contextual inference is required. We conclude that anticipatory language processing is able to draw upon global scene representations to make contextual inferences. These findings are compatible with theories assuming contextual guidance, but posit a challenge for theories assuming object-based visual indices. (shrink)

BackgroundThe ARRIVE (Animal Research: Reporting of In Vivo Experiments) guidelines are widely endorsed but compliance is limited. We sought to determine whether journal-requested completion of an ARRIVE checklist improves full compliance with the guidelines.MethodsIn a randomised controlled trial, manuscripts reporting in vivo animal research submitted to PLOS ONE (March–June 2015) were randomly allocated to either requested completion of an ARRIVE checklist or current standard practice. Authors, academic editors, and peer reviewers were blinded to group allocation. Trained reviewers performed outcome adjudication (...) in duplicate by assessing manuscripts against an operationalised version of the ARRIVE guidelines that consists 108 items. Our primary outcome was the between-group differences in the proportion of manuscripts meeting all ARRIVE guideline checklist subitems.ResultsWe randomised 1689 manuscripts (control: n = 844, intervention: n = 845), of which 1269 were sent for peer review and 762 (control: n = 340; intervention: n = 332) accepted for publication. No manuscript in either group achieved full compliance with the ARRIVE checklist. Details of animal husbandry (ARRIVE subitem 9b) was the only subitem to show improvements in reporting, with the proportion of compliant manuscripts rising from 52.1 to 74.1% (X2 = 34.0, df = 1, p = 2.1 × 10−7) in the control and intervention groups, respectively.ConclusionsThese results suggest that altering the editorial process to include requests for a completed ARRIVE checklist is not enough to improve compliance with the ARRIVE guidelines. Other approaches, such as more stringent editorial policies or a targeted approach on key quality items, may promote improvements in reporting. (shrink)