Detecting stable phase structures in EEG signals to classify brain activity amplitude patterns     

Yusely Ruiz  Guang Li  Walter J. Freeman  Eduardo Gonzalez 《浙江大学学报(A卷英文版)》2009,10(10):1483-1491

Obtaining an electrocorticograms （ECoG） signal requires an invasive procedure in which brain activity is recorded from the cortical surface. In contrast, obtaining electroencephalograms （EEG） recordings requires the non-invasive procedure of recording the brain activity from the scalp surface, which allows EEG recordings to be performed more easily on healthy humans. In this work, a technique previously used to study spatial-temporal patterns of brain activity on animal ECoG was adapted for use on EEG. The main issues are centered on solving the problems introduced by the increment on the interelectrode distance and the procedure to detect stable frames. The results showed that spatial patterns of beta and gamma activity can also be extracted from the EEG signal by using stable frames as time markers for feature extraction. This adapted technique makes it possible to take advantage of the cognitive and phenomenological awareness of a normal healthy subject.  相似文献   

Social functioning among college students diagnosed with ADHD and the mediating role of emotion regulation     

Julia Ryan  Samantha Ross  Rebecca Reyes  Stacey Kosmerly  Maria Rogers 《Emotional and Behavioural Difficulties》2016,21(4):387-402

Despite the many studies that have documented the association between symptoms of ADHD and social difficulties in children and adolescents, few have examined this phenomenon in college students. In addition, the underlying factors contributing to such social difficulties are still poorly understood. We hypothesised that college students with symptoms of ADHD, namely inattention and hyperactivity/impulsivity, would continue to display social behavioural difficulties, and that emotion regulation would play a mediating role in that relationship. Ninety-nine 17–24-year-old college students filled out three questionnaires to assess Inattentive and Hyperactivity/Impulsivity Symptoms, Social Skills, and Emotion Regulation abilities. Analysis revealed that emotion regulation is a significant mediator between Inattentive Symptoms and Social Skills for female students. There was no significant correlation between ADHD symptoms and Social Skills for males. Female college students report social functioning difficulties associated with their inattentive and hyperactive symptoms, and impaired emotion regulation abilities mediate this relationship for inattentive symptoms only.  相似文献   

“Trickle-down” reform: Hispanics,higher education,and the excellence movement     

John J. Halcón  Dr. María de la Luz Reyes 《The Urban Review》1991,23(2):117-135

The current excellence-in-education movement has dealt a heavy blow to the advancement of Hispanics seeking degrees in higher education. Attempting to reform education while ignoring the concerns of minorities who traditionally have not fared well in schools strongly suggests that reformers expect the benefits of reform to trickle down to minorities after first benefiting mainstream students. The result is that reform measures such as the raising of college admission standards, the restructuring of financial aid, curriculum changes, and competency tests for teachers have added additional hurdles for Hispanic students, placing greater restrictions on their access to higher education. Reconceptualizing the definition ofexcellence to include not only higher standards, but educational equity, is a demographic imperative as the nation moves to a minority majority.  相似文献   

Leaving the classroom: a didactic framework for education in environmental sciences     

Eduardo Dopico  Eva Garcia-Vazquez 《Cultural Studies of Science Education》2011,6(2):311-326

In Continuous Education curricula in Spain, the programs on sciences of the environment are aimed toward understandings of sustainability. Teaching practice rarely leaves the classroom for outdoor field studies. At the same time, teaching practice is generally focused on examples of how human activities are harmful for ecosystems. From a pedagogic point of view, it is less effective to teach environmental science with negative examples such as catastrophe, tragedy, and crisis. Rather, teaching environmental sciences and sustainable development might be focused on positive human-environment relationships, which is both important for the further development of students and educators. Within rural settings, there are many such examples of positive relationships that can be emphasized and integrated into the curriculum. In this article, we propose teaching environmental sciences through immersion in rural cultural life. We discuss how fieldwork serves as a learning methodology. When students are engaged through research with traditional cultural practices of environmental management, which is a part of the real and traditional culture of a region, they better understand how positive pedagogy instead of pedagogy structured around how not-to-do examples, can be used to stimulate the interactions between humans and the environment with their students. In this way, cultural goods serve as teaching resources in science and environmental education. What we present is authentic cases where adults involved in a course of Continuous Education explore ‘environmentally-friendly’ practices of traditional agriculture in Asturias (north of Spain), employing methodologies of cultural studies.  相似文献   

Children's literacy funds of knowledge in an urban Mexican elementary school: changing the approach     

Esther Tapia  Iliana Reyes  Judith Kalman 《Literacy》2023,57(3):340-351

In this article, we share the vernacular literacy practices of a sixth grade students in Mexico City. From a sociocultural, ethnographic perspective and based on the contributions of the sociolinguistics of mobility and funds of knowledge, we describe the experiences and knowledge that children bring with them from home and the community to school, to write and read texts on their own during class. The findings show how they appropriate literacy practices to provide meaning to their reading and writing through the relationship between school and everyday literacy and the continuum between their oralities and literacies. Children construct literacy according to their day-to-day experiences, in and out of the classroom, and embed their literacy practices within their funds of knowledge developed at home with their families. Based on these findings, we question the significance and quintessential role that has been attributed to the school in the teaching of reading and writing, as well as the prevalence of individualistic and rigid approaches to the teaching of reading and writing.  相似文献   

Relative Age Effect,Biological Maturation,and Coaches’ Efficacy Expectations in Young Male Soccer Players     

Iván Peña-González  Jaime Fernández-Fernández  Manuel Moya-Ramón  Eduardo Cervelló 《Research quarterly for exercise and sport》2018,89(3):373-379

Purpose: The talent identification and selection process in young male soccer players is mainly focused on anthropometrics and physical performance, but social factors are also considered in this process. The purpose of this study was to test the existence of the relative age effect and its possible influence on anthropometrics and physical performance and to analyze coaches’ efficacy expectations. Method: Data for 564 young male soccer players (M_age = 13.7 ± 1.5 years; M_weight = 53.7 ± 11.6 kg; M_height = 160.2 ± 11.6 cm) included their birth quartile, maturity status, anthropometrics, a physical test battery, and coaches’ efficacy expectations. Results: Early-born players were overrepresented (p < .05). Early-born players were not statistically taller, heavier, or better at physical performance (p > .05) when maturation and chronological age were controlled as confounding factors. However, coaches expected more from early-born players (p < .05), and the inferential analysis showed likely to very likely worthwhile differences between the coaches’ expectations for players born in the first quartile of the year and those born in the fourth quartile of the year. Conclusions: Anthropometrical and physical performance variables were not affected by birth quartile, and coaches’ efficacy expectations were related to the relative age effect.  相似文献