Aspectos metodológicos de la investigación experimental sobre la adquisición de la lectura

RESUMEN

En este trabajo se revisan algunos aspectos de la metodología de la investigación experimental cognitiva. Tras un breve análisis de ciertas cuestiones acerca de los sujetos, aparatos y estímulos, se propone una taxonomía de veinte tareas experimentales, incluyendo procedimientos relacionados con las primeras etapas del procesamiento y otros implicados en las propiedades del procesador central. Estas tareas están especialmente dedicadas a evaluar tres dimensiones cognitivas en el aprendizaje de la lectura: las subhabilidades de los procesos de codificación, el estado de las rutas de acceso al léxico y las propiedades del sistema cognitivo (tales como la velocidad y la precisión de las estrategias de procesamiento).     

The Relation Between Executive Function and Theory of Mind is More Than Skin Deep

A simple “expression” account of the relation between executive function (EF) and children's developing theory of mind (ToM) has difficulty accounting for the generality of the changes occurring in children's mental-state understanding during the preschool years. The current study of preschool children (N = 43) showed that EF—especially conflict EF—related uniformly to ToM measures that imposed either high or low executive demands, independent of verbal ability. These findings can be explained within an emergence account wherein executive skills are implicated in the acquisition of mental-state concepts as opposed to merely the expression of these concepts in task performance.     

Faith-Based Organizations: Sexual Harassment and Health in Accra-Tema Metropolis

Sexual harassment occurs frequently in many faith-based organizations (FBOs). This study investigated whether sexual harassment in FBOs was a public health concern in Ghana. A cross-sectional exploratory approach was used to assess the prevalence and incidence of traditional or contrapower sexual harassment in FBOs. We also investigated the correlation between sexual harassment and health. Respondents completed a self-administered open-ended questionnaire in an anonymous survey about sexual harassment during the 12 months preceding the study. We hypothesized that both traditional and contrapower harassment were prevalent in FBOs of Ghana and also that the health effects were the same for both sexes in both forms of harassment. The two hypotheses were generally supported. We found that sexual harassment is a public health concern. Women were more likely to be sexually harassed (73%) than men were (27%). Sexual harassment negatively affects the victims’ health outcome. Secondly, both the traditional and contrapower forms of sexual harassment were prevalent in FBOs in Ghana. The health consequences of sexual harassment in Ghana are the same as in an industrialized country. The implications for policy and research are discussed.     

Religious upbringing and current religiosity in Spanish nursing and medicine students

The influence of religious education in the family upon current spiritual and religious tendencies was assessed in a sample of 599 Spanish nurse and medicine students using a religiosity scale and answers to a series of belief/disbelief statements. Results showed that nursing and medicine students were equally low-religious, with no differences in religiosity total scores between participants coming from religious families; however, medical students coming from nonreligious families showed higher religiousness than the corresponding nursing trainees. This distinction appeared both across religiosity items and in a variety of responses to belief/disbelief of Christian/secular assertions. Regression analysis showed that religious family background was a consistent predictor of religious beliefs at young adulthood, and its influence was higher for medical students. In addition to establish religious upbringing as an important factor modulating enduring religiosity, these findings provide distinctions between nurse and medical trainees, and reproduce, in a Spanish mainly catholic sample, the structure of religiosity factors previously found on North American mainline protestants.     

The topography of high-order human object areas

Cortical topography is one of the most fundamental organizing principles of cortical areas. One such topography - eccentricity mapping - is present even in high-order, ventral stream visual areas. Within these areas, different object categories have specific eccentricity biases. In particular, faces, letters and words appear to be associated with central visual-field bias, whereas buildings are associated with a peripheral one. We propose that resolution needs are an important factor in organizing object representations: objects whose recognition depends on analysis of fine detail will be associated with central-biased representations, whereas objects whose recognition entails large-scale integration will be more peripherally biased.     

A two-sample test

In certain investigations involving an experimental group and a control group, the effect of the experimental treatment may be expected to manifest itself by increasing the scores of some subjects but by decreasing the scores of other subjects. Examples arise in the area of defensive behavior. Customary tests of differences between means are inappropriate for assessing the existence of effect of the experimental treatment in such cases. A test based on the ranks of the observations is proposed; it will be sensitive to extreme scores (either large or small or both) for experimentals.     

Goal programming with dynamic goals

The aim of this paper is to present a dynamic goal programming scheme. Throughout the revised literature, most of the dynamic goal programming approaches use target values on the final value of the objective functionals. In this paper, dynamic target values are assumed, so that they control not only the final values of the corresponding functionals, but their evolution along the planning period. As a result, the scalar problems are also dynamic ones, where the evolution of the deviation variables is minimized. A lexicographic dynamic goal programming algorithm is developed on these basis, and some considerations are made on the efficiency of the final solutions. © 1998 John Wiley & Sons, Ltd.