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José-Antonio Navia Carlos Avilés Sergio López Luis-Miguel Ruiz 《Estudios de Psicología》2018,39(1):1-19
The classical cognitive concept of anticipation and timing (for example, reaction time) somewhat limits the study of sports actions under spatio-temporal pressure. The presence, duration and evolution of the information of the opponents, spatio-temporal pressure, the evolution of the athlete’s response movements or the degree of representativeness are some of the issues facilitating research into an anticipation that is better adjusted to the specific circumstances of interception tasks. This article proposes that temporalization of response actions is based on the balance between the spatio-temporal demands of the task, the athlete’s action capabilities and the evolution of the reliability of the available variables. In order to obtain good performance in these actions under pressure, individual perceptual differences and possible interactions with other information sources must also be considered. 相似文献
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Andrés Molero-Chamizo José R. Alameda Bailén Tamara Garrido Béjar Macarena García López Inmaculada Jaén Rodríguez Carolina Gutiérrez Lérida Silvia Pérez Panal Gloria González Ángel Laura Lemus Corchero María J. Ruiz Vega Michael A. Nitsche Guadalupe N. Rivera-Urbina 《Cognitive, affective & behavioral neuroscience》2018,18(1):167-175
Anodal transcranial direct current stimulation (tDCS) induces long-term potentiation-like plasticity, which is associated with long-lasting effects on different cognitive, emotional, and motor performances. Specifically, tDCS applied over the motor cortex is considered to improve reaction time in simple and complex tasks. The timing of tDCS relative to task performance could determine the efficacy of tDCS to modulate performance. The aim of this study was to compare the effects of a single session of anodal tDCS (1.5 mA, for 15 min) applied over the left primary motor cortex (M1) versus sham stimulation on performance of a go/no-go simple reaction-time task carried out at three different time points after tDCS—namely, 0, 30, or 60 min after stimulation. Performance zero min after anodal tDCS was improved during the whole course of the task. Performance 30 min after anodal tDCS was improved only in the last block of the reaction-time task. Performance 60 min after anodal tDCS was not significantly different throughout the entire task. These findings suggest that the motor cortex excitability changes induced by tDCS can improve motor responses, and these effects critically depend on the time interval between stimulation and task performance. 相似文献
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D. Hernaus Z. Xu E. C. Brown R. Ruiz M. J. Frank J. M. Gold J. A. Waltz 《Cognitive, affective & behavioral neuroscience》2018,18(6):1338-1351
Individuals from across the psychosis spectrum display impairments in reinforcement learning. In some individuals, these deficits may result from aberrations in reward prediction error (RPE) signaling, conveyed by dopaminergic projections to the ventral striatum (VS). However, there is mounting evidence that VS RPE signals are relatively intact in medicated people with schizophrenia (PSZ). We hypothesized that, in PSZ, reinforcement learning deficits often are not related to RPE signaling per se but rather their impact on learning and behavior (i.e., learning rate modulation), due to dysfunction in anterior cingulate and dorsomedial prefrontal cortex (dmPFC). Twenty-six PSZ and 23 healthy volunteers completed a probabilistic reinforcement learning paradigm with occasional, sudden, shifts in contingencies. Using computational modeling, we found evidence of an impairment in trial-wise learning rate modulation (α) in PSZ before and after a reinforcement contingency shift, expressed most in PSZ with more severe motivational deficits. In a subsample of 22 PSZ and 22 healthy volunteers, we found little evidence for between-group differences in VS RPE and dmPFC learning rate signals, as measured with fMRI. However, a follow-up psychophysiological interaction analysis revealed decreased dmPFC-VS connectivity concurrent with learning rate modulation, most prominently in individuals with the most severe motivational deficits. These findings point to an impairment in learning rate modulation in PSZ, leading to a reduced ability to adjust task behavior in response to unexpected outcomes. At the level of the brain, learning rate modulation deficits may be associated with decreased involvement of the dmPFC within a greater RL network. 相似文献
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Ruiz Hernández JA Torrente Hernández G Rodríguez González A Ramírez de la Fe Mdel C 《The Spanish journal of psychology》2011,14(1):227-236
The aim of this paper was to develop an instrument to assess levels of stress experienced by Latin-American immigrants in their acculturative process in Spain. A sample of 692 immigrants from Latin America, aged 20 to 63 years, took part on this study (54.9% males and 45.1% females). A 24-item questionnaire with high reliability (.92) was elaborated. Six factors related to acculturative stress were found: 1) discrimination and rejection; 2) differences with the out-group (native Spaniards); 3) citizenship problems and legality; 4) problems concerning social relationships with other immigrants; 5) nostalgia and longing; and 6) family break-up. Our findings show that participants have a high level of stress related to nostalgia and longing, family break-up, and the perception of discrimination and rejection by natives. The usefulness of the instrument and its applications and restrictions are discussed. 相似文献
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RESUMENLas autoras comienzan ofreciendo una panorámica general de las investigaciones sobre el síndrome de fobia a las matemáticas y la ansiedad ante los exámenes, explicando a continuación que el objetivo general de su estudio es desarrollar procedimientos de modificación de conducta que ayuden a estudiantes de Psicología, con una historia previa de conductas de evitación a los exámenes, a enfrentarse a las pruebas de psicología matemática. Más específicamente, se quiere comparar la eficacia de la Desensibilización Sistemática tradicional con un paquete cognitivo complejo desarrollada por ellas siguiendo el modelo de Inoculación de Estrés, y el valor de estas dos intervenciones específicas se compara, a su vez, con un grupo de terapia no orientado al problema. Tras describir el método y resultados, las autoras destacan en la discusión la eficacia de las tres intervenciones y el hecho de que se lograse afectar al rendimiento y no sólo a la ansiedad en matemáticas. Finalmente afirman que sus resultados apoyan la actualidad de la obra de Frank (1973, 1982), quien señala que una parte muy importante de los efectos psicoterapéuticos se debe a factores comunes a todas las terapias, en los que habitualmente no recae el peso explicativo. 相似文献