The study of cognitive development has been, and still is, faced with two fundamental problems. They are connected, and no satisfactory answer has been found to either. The first problem concerns a terminological distinction and the corresponding semantic contents - it is important to be clear about which characteristics make it possible to distinguish percepts from concepts proper. The second problem, which depends on such distinction, consists in determining when and how, in cognitive development, the turn from perceptual categories into (...) concepts occurs. This paper provides a clear and precise answer to both questions. (shrink)

The trade and technological war initiated in 2018 between China and the United States has increased interest in the possible hegemonic succession. In this paper, starting from the concept of interstate hegemony, a comparative analysis of the material capabilities of each power in five areas: productive, technological, commercial, monetary-financial and military. This analysis makes it possible to quantify whether China can surpass the United States. As a result, it is concluded that China is far from surpassing the United States in (...) the military and monetary-financial areas, but it can compete in the productive, commercial, and certain critical technological sectors. (shrink)

In this paper we prove that the free algebras in a subvariety equation image of the variety equation image of semi-Heyting algebras are directly decomposable if and only if equation image satisfies the Stone identity.

Background: The prevalence of anxiety and depression in young students is associated with biosocial factors and scholastic stress. However, few studies have evaluated emotional-affective symptoms that are related to the immune system and antioxidant parameters in young individuals without diagnoses of affective disorders.Aim: This study aims to assess the relationship between emotional-affective symptoms and glutathione concentrations and CD4 and CD8 lymphocyte counts in college students.Methods: College students completed standardized psychometric instruments, including the Perceived Stress Scale, Hamilton Anxiety Scale, Beck Depression (...) Inventory, Familiar Social and Friends Support Scale, and Rosenberg Scale. Blood samples were biochemically analyzed. Analyses of variance were conducted between four groups according to symptom severity.Results: A considerable prevalence of stress, anxiety, and depression symptoms was observed and negatively correlated with self-esteem and socio-familiar support. Perceived stress was sexually dimorphic. Although biochemical parameters were within reference ranges, glutathione, CD4, and CD8 tended to be lower in participants with anxiety and depression symptoms, which may be of predictive value.Conclusion: The relationship between antioxidant/immune parameters and socio-affective scores is latent in undiagnosed college students who might develop affective disorders. The findings suggest that during the initial development of affective disorders, stress management strategies should be implemented to help college students cope with the academic load and monitor negative changes in their physiological state. (shrink)

According to kin selection theory, indirect reproductive advantages may induce individuals to care for others with whom they share genes by common descent, and the amount of care, including self-sacrifice, will increase with the proportion of genes shared. Twins represent a natural situation in which this hypothesis can be tested. Twin pairs experience the same early environment because they were born and raised at the same time and in the same family but their genetic relatedness differs depending on zygosity. We (...) compared the degree of willingness to fight and sacrifice for the co-twin among monozygotic and dizygotic pairs in a sample of 1443 same-sex and opposite-sex twins. We also analyzed the effect of the subject’s gender and that of the co-twin on those altruistic behaviors. Results partly supported the postulated explanation. MZ twins were significantly more likely than DZ twins to self-sacrifice for their co-twins, but zygosity did not affect willingness to fight for him/her. The genders of the subject and of the co-twin, not genetic relatedness, were the best predictors of aggressive altruistic intentions. (shrink)

According to kin selection theory, indirect reproductive advantages may induce individuals to care for others with whom they share genes by common descent, and the amount of care, including self-sacrifice, will increase with the proportion of genes shared. Twins represent a natural situation in which this hypothesis can be tested. Twin pairs experience the same early environment because they were born and raised at the same time and in the same family but their genetic relatedness differs depending on zygosity. We (...) compared the degree of willingness to fight and sacrifice for the co-twin among monozygotic and dizygotic pairs in a sample of 1443 same-sex and opposite-sex twins. We also analyzed the effect of the subject’s gender and that of the co-twin on those altruistic behaviors. Results partly supported the postulated explanation. MZ twins were significantly more likely than DZ twins to self-sacrifice for their co-twins, but zygosity did not affect willingness to fight for him/her. The genders of the subject and of the co-twin, not genetic relatedness, were the best predictors of aggressive altruistic intentions. (shrink)

Mente y mundo es un ensayo filosófico en el que se da respuesta al viejo problema de cómo se vinculan el lenguaje y el pensamiento con el mundo, pero desde una perspectiva enteramente nueva: la que en la actualidad nos proporcionan la psicología cognitiva y la neurología.

ÍNDICE: Presentación. Prólogo - Una reflexión sobre el concepto del arte. - La sensibilidad. - Lo estético. - El estilo. - Arte y Utilidad. - El Dibujo. - Análisis de la línea. - La forma plana - El claroscuro y la entonación. - La textura. - La forma tridimensional. - La armonía. - La simetría - La proporción y el cuerpo humano. - El movimiento. - El peso como elemento plástico. - La composición. - El color. - El diseño. - (...) El rostro humano como significante estético. - El arte como lenguaje. Índice de nombres. (shrink)

While the term ‘nihilism’ has become increasingly widespread throughout the past two centuries, not only in academic discourses but in popular culture more widely, there is a surprising lack of con...

El objetivo principal de este artículo es defender, de acuerdo con A. John Simmons, un punto de vista que, normativamente, propone el consentimiento como condición necesaria de legitimidad y fundamento de la obligación política. Pero, descriptivamente, entiende que tal consentimiento, en tanto que autorización personal y voluntaria, todavía no ha tenido lugar en ninguna sociedad, ni siquiera democrática.

En este artículo intento mostrar que la desigualdad económica, la militarización de los Estados así como el odio y la violencia son las causas de gran parte de los conflictos bélicos. Ante lo cual, apoyándome en una línea que se genera en Oriente pero que no es ajena al pensamiento occidental, propongo seguir investigando en torno al pacifismo gandhiano, así como acerca de valores que el budismo cultiva conscientemente, como es el valor de la compasión universal, y que poseen una (...) gran importancia para consolidar una cultura de la paz. (shrink)

En este trabajo se plantea, en primer lugar, la conveniencia de distinguir en el proceso de la contrastación empirica de hipótesis y teorías entre observación cientifíca y percepción y, en segundo lugar, se muestra como el munda procesado a través de la percepción se erige en base o soporte empírico del conocimiento científico. Una de las consecuencias del trabajo es que Ia tesis de “la carga teórica" de Ia observación ha sido mal planteada, al dar par sentado que esa carga (...) teórica afecta tambien al procesamiento perceptivo de los outputs proporeionados al científico por el instrumental de observación.This paper first suggests that, in analyses of the empirical testing of hypotheses and theories, scientific observation should be distinguished from perception; and goes on to say that the world, as processed by perception, is the basis or empirical foundation of scientific knowledge. This thesis that observation is “theory-laden” has been flawed by its being articulated as applying not only to scientific observation but also to the perceptional processing of the output provided to the scientists by observational instruments. (shrink)

Frente a la tesis de la "carga teórica", se muestra como en el proceso de contrastación de hipótesis y teorías es conveniente distinguir entre observación científica y percepción y, luego, se defiende que en los procesos de percepción no están implicados los conceptos teóricos de la ciencia sino conceptos de otro nivel, los que toman cuerpo en la codificación de la estimulación sensorial procedente de los ítems identificados perceptivamente. De donde se sigue que el mundo identificado a través de los (...) procesos de percepción es la base o soporte empírico del conocimiento científico. (shrink)

Putting forward an original analysis of perceiving as a cognitive attitude, as it contrasts with judging, believing and knowing, the author approaches several issues in the philosophy of perception, such as differences between presentation and representation, the natures of concepts and categorization, the justification of perceptual beliefs and their role in the justification of knowledge. His approach is influenced by phenomenology and by psychology and neuroscience of vision.