Effects of A Dual-Task Intervention in Postural Control and Cognitive Performance in Adolescents

Abstract

The aim was to assess dual- versus single-task training for motor performance and cognitive performance in adolescents. Two experiments were performed. In the first, 30 adolescents were randomized to three groups to determine the effect of dual-task difficulty on postural control: α-scaling and root mean square (RMS). In the second, 20 adolescents were randomized to two groups to determine the effect of dual-task practice to improve working memory. RMS in the post-test was lower than the pre-test in both dual-task groups, while α-scaling was lower in post-test than pre-test only in the high-difficulty dual-task group. A practice effect was observed on the percentage of correct answers only in the dual-task group (p?=?0.035). Thus, dual-task training could enhance motor and cognitive performance more than single-task training.     

Desarrollo cognitivo-motivacional y rendimiento académico en segunda etapa de EGB y BUP

Resumen

En este trabajo se estudia el grado en que dos variables, una de tipo motivacional y otra de tipo cognitivo, permiten pronosticar el rendimiento académico. Una muestra de alumnos de segunda etapa de EGB y de BUP fue evaluada mediante el Test de Longeot, el cuestionario MAPE y un test de CI. Los resultados obtenidos muestran que el nivel de desarrollo cognitivo y el tipo de pautas motivacionales utilizadas por los sujetos explican un alto porcentaje de las diferencias individuales observadas en el rendimiento. El nivel de desarrollo cognitivo es la variable con mayor poder predictivo en EGB, mientras que en BUP este lugar lo ocupa la variable CI. La variable motivacional utilizada es un buen predictor en todos los grupos estudiados. Dependiendo del nivel de edad, las variables utilizadas permiten explicar entre un 60 y un 81 por ciento de la varianza del rendimiento.     

Inferences about mechanisms that mediate pattern and flicker sensitivity

Attention, Perception, & Psychophysics - Visual sensitivity to a flickering, sinusoidal grating was assessed in multiple sclerosis patients and control observers. It was found that losses in...     

Perceiving the causes of coarticulatory acoustic variation: Consonant voicing and vowel pitch

Coarticulatory acoustic variation is presumed to be caused by temporally overlapping linguistically significant gestures of the vocal tract. The complex acoustic consequences of such gestures can be hypothesized to specify them without recourse to context-sensitive representations of phonetic segments. When the consequences of separate gestures converge on a common acoustic dimension (e.g., fundamental frequency), perceptual parsing of the acoustic consequences of overlapping spoken gestures, rather than associations of acoustic features, is required to resolve the distinct gestural events. Direct tests of this theory were conducted. These tests revealed mutual influences of (1) fundamental frequency during a vowel on prior consonant perception, and (2) consonant identity on following vowel stress and pitch perception. The results of these converging tests lead to the conclusion that speech perception involves a process in which acoustic information for coarticulated gestures is parsed from the stream of speech.     

Brain c-Fos immunocytochemistry and cytochrome oxidase histochemistry after a fear conditioning task

The involvement of the basolateral and the medial amygdala in fear conditioning was evaluated using different markers of neuronal activation. The method described here is a combination of cytochrome oxidase (CO) histochemistry and c-Fos immunocytochemistry on fresh frozen brain sections. Freezing behavior was used as an index of auditory and contextual fear conditioning. As expected, freezing scores were significantly higher in rats exposed to tone-shock pairings in a distinctive environment (conditioned; COND), as compared to rats that did not receive any shocks (UNCD). CO labeling was increased in the basolateral and medial amygdala of the COND group. Conversely, c-Fos expression in the basolateral and medial amygdala was lower in the COND group as compared to the UNCD group. Furthermore, c-Fos expression was particularly high in the medial amygdala of the UNCD group. The data provided by both techniques indicate that these amygdalar nuclei could play different roles on auditory and contextual fear conditioning.     

On the bistability of sine wave analogues of speech

Our studies revealed two stable modes of perceptual organization, one based on attributes of auditory sensory elements and another based on attributes of patterned sensory variation composed by the aggregation of sensory elements. In a dual-task method, listeners attended concurrently to both aspects, component and pattern, of a sine wave analogue of a word. Organization of elements was indexed by several single-mode tests of auditory form perception to verify the perceptual segregation of either an individual formant of a synthetic word or a tonal component of a sinusoidal word analogue. Organization of patterned variation was indexed by a test of lexical identification. The results show the independence of the perception of auditory and phonetic form, which appear to be differently organized concurrent effects of the same acoustic cause.     

A Dyadic Perspective on Speech Accommodation and Social Connection: Both Partners' Rejection Sensitivity Matters

Findings from confederate paradigms predict that mimicry is an adaptive route to social connection for rejection‐sensitive individuals (Lakin, Chartrand, & Arkin, 2008). However, dyadic perspectives predict that whether mimicry leads to perceived connection depends on the rejection sensitivity (RS) of both partners in an interaction. We investigated these predictions in 50 college women who completed a dyadic cooperative task in which members were matched or mismatched in being dispositionally high or low in RS. We used a psycholinguistics paradigm to assess, through independent listeners' judgments (N = 162), how much interacting individuals accommodate phonetic aspects of their speech toward each other. Results confirmed predictions from confederate paradigms in matched RS dyads. However, mismatched dyads showed an asymmetry in levels of accommodation and perceived connection: Those high in RS accommodated more than their low‐RS partner but emerged feeling less connected. Mediational analyses indicated that low‐RS individuals' nonaccommodation in mismatched dyads helped explain their high‐RS partners' relatively low perceived connection to them. Establishing whether mimicry is an adaptive route to social connection requires analyzing mimicry as a dyadic process influenced by the needs of each dyad member.     

Procrastinators and Clutter: An Ecological View of Living with Excessive “Stuff”

In the present study, young adults (n = 346; M age = 21.5 years old) completed self-reported measures of procrastination, self-identity with possessions, clutter, place attachment, and psychological home to provide an ecological understanding of the context in which chronic procrastinators live. Results found behavioral procrastination tendencies related only to clutter (a belief that living spaces have too much “stuff,” feeling overwhelmed with excessive possessions, and that one’s personal life is negatively impacted by many possessions). Clutter in one’s living space, negative emotions, and impaired social ability all predicted high procrastination scores. Clutter was the best predictor of procrastination as determined by multiple regression. Taken together, chronic procrastinators reported too much clutter (possessions, or stuff), and that clutter interferes with a strong quality of their lives.     

Materialism and the Bright and Dark Sides of the Financial Dream in Spain: The Positive Role of Money Attitudes—The Matthew Effect

Research suggests that materialism leads to the dark side of the financial dream. In this study, we treat love of money as a mediator and test a theoretical model's direct path (Materialism to Financial Satisfaction) and indirect path (Materialism to Love of Money to Financial Satisfaction) simultaneously using the whole sample and across several demographic variables based on 1,011 citizens in Spain. Results for the whole sample showed that the positive indirect effect suppressed the negative direct effect creating an overall small positive effect. Furthermore, we found a significant negative direct path for rural dwellers, the 30–44‐year‐old age group, and married people, but a positive indirect path for rural residents, the 45–59‐year‐old age group, married, males, and urban dwellers. Overall, those in the 30–44 age group, rural residents, and married people experienced the dark side of the financial dream, whereas old (over‐60 age group), unmarried, urban, and young people (18–29 age group) enjoyed the bright side of their financial optimism. People's money attitudes and demographic variables play a positive role in our understanding of materialism and financial satisfaction, i.e. the Matthew Effect. Our novel, counterintuitive, and original theoretical, empirical, and practical contributions foster theory development and testing and improved practice.     

A Modal View on Resource-Bounded Propositional Logics

Studia Logica - Classical propositional logic plays a prominent role in industrial applications, and yet the complexity of this logic is presumed to be non-feasible. Tractable systems such as...