Problemas metodológicos y conceptuales en el estudio de la función autorreguladora del habla

Resumen

Desde una perspectiva vygotskiana se revisa la evolución de las investigaciones relativas al desarrollo de la función reguladora del habla. Se discuten la metodología y el soporte conceptual de los estudios originales de Luria y de los intentos de replicación realizados por autores occidentales. Se presentan y comentan también varias aportaciones posteriores: tanto los nuevos planteamientos empíricos como los nuevos desarrollos conceptuales. Finalmente, se señala la necesidad de atender a nuevos criterios en la elección de las tareas, de registrar las verbalizaciones espontáneas y de analizar el proceso de sociogénesis. Se concluye identificando dos factores influyentes en la emisión del habla egocéntrica (dificultad relativa de la tarea y percepción del contexto social) y distinguiendo, dentro del funcionamiento de la autorregulación verbal, entre el sistema activador, ligado a los aspectos de impulso, y el sistema de planificación y control, asociado a la propiedad de mediación semiótica.     

Creativity,chaos, and self‐renewal in human systems

The research findings from the psychology of creativity are shown to be of considerable relevance to the study of self‐organization and self‐renewal in human systems. The characteristics of the creative person, and the nature of the creative process, particularly as they have been elaborated by Barron, are shown to be remarkably congruent with recent findings and theoretical elaborations by Abraham, Jantsch, Laszlo, Prigogine, and others in the fields of evolutionary and chaos theory. The broader social implications of chaos and evolutionary theories are fleshed out through an understanding of their characteristics in creative human systems.     

From Strategic Planning to Strategic Design: Reconceptualizing the Future of Strategy in Organizations

In this article I present an overview of critiques of strategic planning, focusing on their conceptualizations of the environment. I first outline the need for a more comprehensive understanding of the nature of the environment of strategy, and then outline some of the alternatives to strategic planning and their underlying bases in constructivism and the sciences of complexity. I conclude by arguing that Banathy's systems design methodology is eminently suited to the process of strategy formulation, and should be explored more deeply within this context.     

Engaging the motor system with masked orthographic primes: A kinematic analysis

We report two experiments in which participants categorized target words (e.g., BLOOD or CUCUMBER) according to their canonical colour of red or green by pointing to a red square on the left or a green square on the right. Unbeknownst to the participants, the target words were preceded by the prime words “red” or “green”. We found that the curvature of participants’ pointing trajectories was greater following incongruent primes (green–BLOOD) than it was following congruent primes, indicating that individuals initiated a response on the basis of the prime and then corrected that response mid-flight. This finding establishes that the processing of masked orthographic stimuli extends down to include the formulation of an overt manual response.     

Recognition memory deficits in mild cognitive impairment

ABSTRACT

There is no agreement on the pattern of recognition memory deficits characteristic of patients diagnosed with mild cognitive impairment (MCI). Whereas lower performance in recollection is the hallmark of MCI, there is a strong controversy about possible deficits in familiarity estimates when using recognition memory tasks. The aim of this research is to shed light on the pattern of responding in recollection and familiarity in MCI. Five groups of participants were tested. The main participant samples were those formed by two MCI groups differing in age and an Alzheimer's disease group (AD), which were compared with two control groups. Whereas one of the control groups served to assess the performance of the MCI and AD people, the other one, composed of young healthy participants, served the purpose of evaluating the adequacy of the experimental tasks used in the evaluation of the different components of recognition memory. We used an associative recognition task as a direct index of recollection and a choice task on a pair of stimuli, one of which was perceptually similar to those studied in the associative recognition phase, as an index of familiarity. Our results indicate that recollection decreases with age and neurological status, and familiarity remains stable in the elderly control sample but it is deficient in MCI. This research shows that a unique encoding situation generated deficits in recollective and familiarity mechanisms in mild cognitive impaired individuals, providing evidence for the existence of deficits in both retrieval processes in recognition memory in a MCI stage.     

The representation of grammatical categories in the brain

Language relies on the rule-based combination of words with different grammatical properties, such as nouns and verbs. Yet most research on the problem of word retrieval has focused on the production of concrete nouns, leaving open a crucial question: how is knowledge about different grammatical categories represented in the brain, and what components of the language production system make use of it? Drawing on evidence from neuropsychology, electrophysiology and neuroimaging, we argue that information about a word's grammatical category might be represented independently of its meaning at the levels of word form and morphological computation.     

Examining the Latent Structure of Posttraumatic Growth Between Male and Female Survivors in the Immediate Aftermath of a Flash Flood Disaster

The study examined and compared the latent structure of posttraumatic growth (PTG) based on three proposed models: 1-factor, 3-factor and 5-factor models in order to (1) find out the factor structure that has the best fit for the Filipino sample; (2) find out the factor structure that best represents PTG in the immediate aftermath of a flash flood disaster; and (3) examine the generalizability of the best-fitted model across gender. A sample of 895 survivor-respondents answered the Posttraumatic Growth Inventory (PTGI) within a month after a deadly flash flood. Based on the best-fitted model, a multi-group comparison between male and female was conducted to determine gender generalizability. Results showed that the 3-factor model comprising of Changes in Self/Positive Life Attitudes, Philosophy of Life, and Relating to Others fitted best in contrast to the other two models. The data also demonstrated the generalizability of the 3-factor model across gender, with invariance in factor loadings, item intercepts, factor variance and covariance, and factor means.     

Differences in false recollection according to the cognitive reserve of healthy older people

We present an associative recognition experiment comparing three samples of healthy people (young people, older people with high cognitive reserve [HCR], and older people with low cognitive reserve [LCR], with each sample consisting of 40 people), manipulating stimuli repetition during the study phase. The results show significant differences among the three samples in their overall performance. However, these differences are not due to a different use of familiarity, but rather due to a different way of using recollection: although there are no differences in the hit rates between the HRC and LRC samples, the LCR group makes significantly more recollective false alarms than the HCR group. Moreover, repetition provokes an increase in the recollective false alarms in the LCR group, but this does not occur in the group of young people or in the HCR group. These findings are explained in terms of recollection-based monitoring errors and seem to provide support for the cognitive reserve hypothesis.     

Understanding Real and Fictional Persons: Narrative Negotiations Seen Through Cognitive Poetics

Narrative theories of personal identity have traditionally taken literary characters as models to better understand how our identities are constituted through the narratives of our lives. However, there have been several recent criticisms of these comparisons, showing that philosophers of personal identity paid no attention to the nature of literary characters, and consequently, these philosopher’s comparisons were under-motivated. In the present article, I rely on a cognitive framework to define literary characters. From that point of view, I assert that it is fruitful to compare ourselves with literary characters to understand the role that the narratives told by others about ourselves play in the constitution of our own personal identities.     

Approximation of Value Efficient Solutions

We introduce an approximation set to the value efficient set in multiobjective problems under partial information on the decision maker's preferences modelled by a vector value function. We show monotonicity and convergence properties based on increasingly precise vector value functions with two components, which improve the approximation and might be a support to possible solution methods. © 1997 John Wiley & Sons, Ltd.