ABSTRACT
Resumen La atención selectiva es la función cognitiva que orienta la atención hacia los objetos o estímulos que resultan relevantes evitando la distracción frente a aquellos que son irrelevantes. En general, la literatura indica que el desempeño de la atención selectiva mejora notablemente con la edad, sin embargo, las diferencias vinculadas a esta variable no se cumplen para todas las condiciones de cantidad de estímulos distractores ni para todos los grupos de edad. Asimismo, aún no se ha explorado la contribución del control inhibitorio y la velocidad de procesamiento a esta mejora progresiva. Por este motivo, y debido a la escasez de estudios en población infantil, se propuso analizar la contribución relativa de la velocidad de procesamiento y de la inhibición al desempeño en una tarea de atención selectiva y búsqueda visual en esta etapa evolutiva. Para ello, se administró una tarea de búsqueda de conjunciones y una tarea simple de velocidad de respuesta a 295 niños de 6 a 13 años de edad. Los resultados permitieron plantear dos conclusiones principales: por un lado, que la atención selectiva mejora consistentemente durante la niñez y, por otro lado, que no existe un mecanismo general y exclusivo capaz de explicar estas diferencias durante esta etapa vital. Así, tanto la velocidad de procesamiento como el control inhibitorio contribuyen al desarrollo de la atención selectiva y ambos mecanismos cognitivos actúan de manera complementaria más que excluyente.
Abstract Selective attention allows directs attention to relevant objects or stimuli, while avoiding distraction from those that are irrelevant. The literature indicates that performance in CVS tasks improves markedly with age. However, age-related differences are not met neither for every number of distractor conditions nor for all age groups. In addition, the contribution of inhibitory control and processing speed to this progressive improvement has not yet been explored. For this reason, and due to the scarcity of studies using CVS paradigm to evaluate selective attention in children, the present study aimed to analyze the relative contribution of processing speed and inhibition to performance during this evolutionary period in a selective attention and CVS task. To do this, a CVS and a simple response speed task were administered to 295 children aged 6-13 years old. Results offered two conclusions: first, selective attention improves during childhood; second, there is no general and exclusive mechanism capable of explaining these differences during this period. Thus, both processing speed and inhibitory control contribute to development of selective attention, and they seem to be more complementary mechanisms than excluding ones.
ABSTRACT
Resumen Las habilidades académicas constituyen un componente específico del éxito escolar y numerosos factores influyen en su adquisición y consolidación. Uno de estos es la habilidad de regulación emocional de tolerancia al distrés, que se define por la capacidad de resistir esta dos emocionales negativos en pos de un objetivo. El propósito de este trabajo fue analizar la relación entre la tolerancia al distrés y las habilidades académicas de comprensión lectora y cálculo matemático en 107 niños de escolaridad primaria de 9 a 11 años de edad. Los resultados mostraron que la tolerancia al distrés resultó un predictor significativo de la comprensión lectora de textos expositivos y del cálculo matemático, no así de la comprensión lectora de textos narrativos. Es posible que la tolerancia al distrés resulte un factor relevante para el éxito académico en varios dominios.
Abstract Academic skills are a specific component of academic success, and many factors influence their acquisition and consolidation. One of these factors is the ability to emotionally regu late distress tolerance, as defined by the ability to withstand negative emotional states in pursuit of a goal. This paper undertook to analyse the relationship between distress tole rance and reading comprehension and mathematical computations in 107 primary school children aged 9 to 11. The results showed that distress tolerance was a significant predictor of reading comprehension of expository texts and mathematical computations, albeit not so for reading comprehension of narrative texts. Distress tolerance is likely to be a relevant factor for academic success in several domains.
ABSTRACT
Los déficit de las funciones ejecutivas (FE) suelen estar presentes en el Trastorno por Déficit de Atención e Hiperactividad (TDAH). Distintos trabajos mostraron algunas falencias vinculadas a la medición de las FE, como la participación de otros procesos que no constituyen objeto de la evaluación. En el trabajo que se informa se analizaron las diferencias existentes en las FE de niños con y sin diagnóstico de TDAH y se buscó identificar y establecer aquellas variables con mayor poder discriminante para la probabilidad de pertenencia a ambos grupos. Se utilizaron las tareas de la batería denominada Tareas de Autorregulación Cognitiva (TAC), diseñadas ad-hoc para evaluar específica y relativamente en forma independiente cada FE. Se trabajó con una muestra de 49 niños escolarizados de 7 a 12 años de edad, de ambos géneros, divididos en dos grupos, uno clínico de 19 niños con diagnóstico de TDAH, con una media de edad igual a 9.84 años (DE = 1.83) y uno control de 30 niños sin diagnóstico de TDAH con una media de edad igual a 10.27 años (DE = .82), equiparados por género, edad, niveles socioeconómico y educacional. Los resultados mostraron que el análisis discriminante permitió clasificar correctamente al 98% de los participantes. Las tareas mejor discriminadas fueron la de Flexibilidad cognitiva y Control inhibitorio comportamental, con un 98.9% y 97.8%, respectivamente, de casos correctos. Esto muestra que la TAC constituye una batería con adecuada sensibilidad y especificidad para discriminar y detectar casos de TDAH con un elevado nivel de confiabilidad y porcentaje de correctos clasificados.
The executive functions (EF) multidimensional approaches state that EFs consist of a set of processes with relative autonomy and independence: working memory (WM), cognitive flexibility (CF), and inhibition. Regarding the inhibitory operation, three dimensions are distinguished, each with distinct operative features: perceptual, cognitive, and behavioral inhibition. Perceptual inhibition is the process that allows the focus on relevant environmental stimuli through the attenuation of the interference generated by other stimuli present in the context. Cognitive inhibition is involved in the decreased level of activation of the prepotent mental representations of intrusive and irrelevant to the achievement of current goals. Finally, behavioral inhibition handles suppress or cancel behaviors and strong, prepotent and un suitable behaviors. While this last type contributes to the inhibitory control of behavior, the other two processes (cognitive and perceptual inhibition) apply to cognition, as involved in regulating the perceptions and representations. Regarding executive operation in general, empirical evidence suggests that these dimensions are involved in such diverse fields as psychopathology, personality, emotion, attentional control and cognitive development. It has been found that deficits in EFs are usually present in the Attention Deficit Hyper activity Disorder (ADHD). The common practice of treating children with ADHD as an undifferentiated group of participants in behavioral and neuropsychological research may have adverse methodological consequences. Relying on group averaging in comparing the performance of ADHD and control groups may produce misleading results, as it conceals possible effects that may characterize some but not all ADHD participants. According to the previous assumptions, the objectives of this work were (1) analyzing the EF performance in children with or without diagnosed ADHD and (2) identifying and setting the variables with greater discriminant power between the normal and clinical groups. Battery tasks called Tareas de Autorregulación Cognitiva (TAC) ad-hoc and designed to assess EFs operation specifically and with relative independence with each other were used. The sample consisted of 49 school-attending children, aged 7-12 years, of both sexes, divided into two groups: (1) a clinical group of 19 children diagnosed with ADHD combined subtype (M age = 9.84 years, SD =1.83), and (2) a control group of 30 children without ADHD diagnosis (M age = 10.27 years, SD = .82), matched by gender, age, socioeconomic and educational level. By analyzing the results, significant differences were found between verbal and visuospatial WM, CF, behavioral and perceptual inhibition indices. Then, a discriminant analysis was made in order to use the index values with significant differences and make predictions about the probability of a subject to be a member of a certain criteria variable value (clinical or control group condition). Results show that discriminant analysis allows to correctly classifying 98% of the participants. The results indicated that the average RT of the mixed block (Cognitive Flexibility) and the Stop Signal RT (Behavioral Inhibition) are the indices with better sensitivity and specificity for detecting the presence of ADHD in this sample. Considering that the area under the curve indicates the probability to classify correctly a couple of healthy and ill individuals randomly selected, then it is possible to conclude that the values of Cognitive Flexibility and Behavioral Inhibitory control tasks had better discriminant power, as they correctly classified 98.9% and 97.8% of the total cases, respectively. This result shows that the TAC Battery presents adequate sensitivity and specificity to discriminate and detect ADHD with a high level of reliability and classification accuracy. Summarizing, we highlight the importance of having an assessment battery such as the totally computerized TAC, which allows the assessment of EFs independently, with an attractive design and straightforward administering and scoring procedures.