Identity concept learning in matching-to-sample tasks by tufted capuchin monkeys (Cebus apella)

The abstract concept of equivalence is considered one of the bases of higher-order cognition, and it has been the subject of considerable research in comparative cognition. This study examined the conditions under which tufted capuchin monkeys (Cebus apella) are able to acquire an identity concept. Six capuchin monkeys were trained to solve a visual matching-to-sample (MTS) task on the basis of perceptual identity. The acquisition of the identity rule was inferred from the subject’s ability to solve transfer tests with novel stimuli. We evaluated the ability of the capuchin monkeys to match the shape of novel stimuli after training with both several small stimulus sets (Experiment 1) and a large stimulus set (Experiment 2). Moreover, we examined the ability of capuchins to transfer the concept to novel visual dimensions, such as colour and size and to transfer to novel spatial arrangements of the stimuli (Experiment 2). We demonstrated that the ability of capuchins to match novel stimuli was improved by increasing the number of stimuli used during training (Experiments 1 and 2) and that after a widely applicable identity concept based on the stimulus shape was acquired, the capuchins were able to match stimuli according to an identity rule based on both the colour and size of the stimuli and when the spatial arrangement of the stimuli was varied (Experiment 2). This study is the first to demonstrate that the size of the training set affects the acquisition of an abstract identity concept in an MTS task in non-human primates.     

Relevance of the listener’s motor system in recalling phrases enacted by the speaker

Memory for series of action phrases improves in listeners when speakers accompany each phrase with congruent gestures compared to when speakers stay still. Studies reveal that the listeners’ motor system, at encoding, plays a crucial role in this enactment effect. We present two experiments on gesture observation, which explored the role of the listeners’ motor system at recall. The participants listened to the phrases uttered by a speaker in two conditions in each experiment. In the gesture condition, the speaker uttered the phrases with accompanying congruent gestures, and in the no-gesture condition, the speaker stayed still while uttering the phrases. The participants were then invited, in both conditions of the experiments, to perform a motor task while recalling the phrases proffered by the speaker. The results revealed that the advantage of observing gestures on memory disappears if the listeners move at recall arms and hands (same motor effectors moved by the speaker, Experiment 1a), but not when the listeners move legs and feet (different motor effectors from those moved by the speaker, Experiment 1b). The results suggest that the listeners’ motor system is involved not only during the encoding of action phrases uttered by a speaker but also when recalling these phrases during retrieval.     

Linguistic Justice and Analytic Philosophy

Abstract

This paper investigates whether analytic philosophers who are non-native English speakers are subject to linguistic injustice and, if yes, what kind of injustice that is and whether it is different from the general disadvantage that non-native English speakers meet in a world where English is rapidly becoming the lingua franca. The paper begins with a critical review of the debate on linguistic justice, with a particular focus on the emergence of a lingua franca and the related questions of justice, both in terms of the disadvantages suffered by those groups who bear the cost of learning another language and in terms of forms of discrimination due to accents and language improprieties. We argue that being at a relative disadvantage compared to others does not necessarily translate in a proper injustice if fundamental civil, political and social provisions are in place. We suggest that a circumstance of injustice arises when such disadvantage affects those who are not yet members of such academic community such as prospective students, thus contributing in keeping the non-native group a minority. We qualify this case of disadvantage as a matter of structural injustice.     

Tommaso Greco: La legge della fiducia. Alle radici del diritto

Ethical Theory and Moral Practice -     

Monitoring for Health in the Work Environment: Beyond Pathology and Occupational Diseases

In ne fait aucun doute que la promotion de la santé dans le monde du travail nécessite une approche nouvelle. Cette affirmation repose sur le fait que les actions en faveur de la santé qui appliquent les notions traditionnelles de la médicine du travail ne sont plus, de nos jours, appropriées. Cette nouvelle approche devrait insister davantage sur l'élimination des effets nocifs de l'exposition à des conditions de travail défavorables et moins sur la prévention de pathologies et de maladies professionelles reconnues. Cet article tente de défendre les idées axées sur la mise en oeuvre d'une autre politique de promotion de la santé basée sur le choix et l'évaluation d'indices précoces comportementaux et psychophysiologiques des risques virtuels de l'environnement de travail.
There is no doubt that the promotion of health in the working world needs a new approach. This statement rests on the fact that the health-related activities based on the traditional concepts of occupational medicine, nowadays, are not adequate. This new approach should focus more on the elimination of the adverse effects of exposure to unfavourable working conditions and less on the prevention of recognised occupational diseases and pathology. This paper is an attempt to contribute with ideas aimed at the development and establishment of an alternative policy of health promotion based on the assessment and evaluation of the behavioural and psychological early indices of potential hazards in the work environment.     

The New Explanatory Objection Against the Fitting Attitude Account of Value

Philosophia - The explanatory objection against the fitting attitude account of value states that if the properties of attitudes explain fittingness facts, but do not always explain value facts,...     

Subjective organization in the episodic memory of individuals with Parkinson’s disease associated with mild cognitive impairment

Word clustering (i.e., the ability to reproduce the same word pairs in consecutive recall trials of an unrelated word list) has been extensively investigated as a proxy of subjective organization (SO) of memorandum. In healthy subjects and in groups of brain-damaged patients, the rate of SO generally predicts accuracy of word list recall. This study aimed at evaluating SO in the performance of patients with Parkinson’s disease (PD) on a word list recall task in order to investigate the basic mechanisms of episodic memory impairment that are frequently observed in these patients. For this purpose, 56 PD patients, who were stratified according to the presence and quality of mild cognitive impairment (MCI), and a group of healthy controls (HCs) were administered a word list task and an extensive battery of neuropsychological tests. Results showed that recall accuracy on the word list task progressively decreased passing from HC to PD patients without cognitive impairment, to patients with single-domain dysexecutive MCI and to patients with multiple-domain dysexecutive and amnesic MCI. Conversely, only the latter PD group showed a lower SO score than that achieved by the other groups. In the overall PD group, correlational and regression analyses demonstrated that SO scores and a composite score of executive functions were not reciprocally related, but both provided an independent and significant contribution to the prediction of word list recall accuracy. These data are discussed in terms of the contribution of executive functions and hippocampal storage processes to the onset of memory impairment in PD.