The Sensitive Period for Tactile Remapping Does Not Include Early Infancy

Visual input during development seems crucial in tactile spatial perception, given that late, but not congenitally, blind people are impaired when skin‐based and tactile external representations are in conflict (when crossing the limbs). To test whether there is a sensitive period during which visual input is necessary, 14 children (age = 7.95) and a teenager (LM; age = 17.38) deprived of early vision by cataracts, and whose sight was restored during the first 5 months and at age 7, respectively, were tested. Tactile localization with arms crossed and uncrossed was measured. Children showed a crossing effect indistinguishable from a control group (Ns = 28, age = 8.24), whereas LM showed no crossing effect (Ns controls = 14, age = 20.78). This demonstrates a sensitive period which, critically, does not include early infancy.     

NATSUM: Narrative abstractive summarization through cross-document timeline generation

A new approach to narrative abstractive summarization (NATSUM) is presented in this paper. NATSUM is centered on generating a narrative chronologically ordered summary about a target entity from several news documents related to the same topic. To achieve this, first, our system creates a cross-document timeline where a time point contains all the event mentions that refer to the same event. This timeline is enriched with all the arguments of the events that are extracted from different documents. Secondly, using natural language generation techniques, one sentence for each event is produced using the arguments involved in the event. Specifically, a hybrid surface realization approach is used, based on over-generation and ranking techniques. The evaluation demonstrates that NATSUM performed better than extractive summarization approaches and competitive abstractive baselines, improving the F1-measure at least by 50%, when a real scenario is simulated.     

Learning environment of a distance and partly-distance postgraduate coursework programs

Learning Environments Research - To provide ongoing learning for busy professionals, universities are increasingly offering postgraduate opportunities by distance and online. This research examined...     

Cognitive-motivational variables of beginner university students in the first year of adaptation to the European Higher Education Area / Variables cognitivo-motivacionales del alumnado de nuevo ingreso en el primer año de adaptación al Espacio Europeo de Educación Superior

Abstract

Within the European Higher Education Area (EHEA) the student is the main protagonist of the learning process. This means that teachers must be aware of the cognitive-motivational aspects that influence their learning. This study analyses the academic goals, learning strategies and levels of academic engagement shown by university students in their first year of adaptation to the European Higher Education Area, as well as the relationship between these variables. The results indicate that most students are averagely oriented towards learning goals and highly oriented towards achievement goals, regularly use a wide variety of learning strategies, and show average levels of academic engagement. The correlations between some of these variables are positive and significant. Further research needs to be carried out to understand the role played by different variables in constructing quality autonomous learning processes, not only in relation to students, as in the case of this study, but also in relation to teachers, tasks, contexts, and academic institutions, as well as the different interactions between them.     

Role of vitamin B12 on methylmalonyl-CoA mutase activity

Vitamin B₁₂ is an organometallic compound with important metabolic derivatives that act as cofactors of certain enzymes, which have been grouped into three subfamilies depending on their cofactors. Among them, methylmalonyl-CoA mutase (MCM) has been extensively studied. This enzyme catalyzes the reversible isomerization of L-methylmalonyl-CoA to succinyl-CoA using adenosylcobalamin (AdoCbl) as a cofactor participating in the generation of radicals that allow isomerization of the substrate. The crystal structure of MCM determined in Propionibacterium freudenreichii var. shermanii has helped to elucidate the role of this cofactor AdoCbl in the reaction to specify the mechanism by which radicals are generated from the coenzyme and to clarify the interactions between the enzyme, coenzyme, and substrate. The existence of human methylmalonic acidemia (MMA) due to the presence of mutations in MCM shows the importance of its role in metabolism. The recent crystallization of the human MCM has shown that despite being similar to the bacterial protein, there are significant differences in the structural organization of the two proteins. Recent studies have identified the involvement of an accessory protein called MMAA, which interacts with MCM to prevent MCM’s inactivation or acts as a chaperone to promote regeneration of inactivated enzyme. The interdisciplinary studies using this protein as a model in different organisms have helped to elucidate the mechanism of action of this isomerase, the impact of mutations at a functional level and their repercussion in the development and progression of MMA in humans. It is still necessary to study the mechanisms involved in more detail using new methods.     

Perceptions of Learning Environment and On‐Task Orientation Among Students Reporting Different Achievement Levels: A Study Conducted Among Norwegian Secondary School Students

The aim of this study was to explore students’ perceptions of their learning environment and on‐task orientation across different achievement levels. Data were gathered in two independent cross‐sectional studies of Norwegian students in grades 8, 9, and 10 (n = 3453 in 2001 and n = 2987 in 2004). Students within the middle achievement levels reported more positive perceptions of learning environments than the high and low achievers. The amount of variance in on‐task orientation that was accounted for by the learning environment was higher for low achievers than for the rest of the students. Furthermore, students in the 2004 sample gave a more positive report of their learning environment and their on‐task orientation than students in 2001. Finally, we found that the improvement in the perceptions of learning environment was stronger for those students who reported low and high achievement than for the rest of the students.     

Cultural transition and academic achievement of students from ethnic minority backgrounds: a content analysis of empirical research on acculturation

Background: The achievement gap between immigrant and non-immigrant students that has been identified in most OECD countries and the considerable educational dropout rate among students from ethnic minority backgrounds in some countries have become serious challenges for national educational systems. The educational underachievement of young people from ethnic minority backgrounds is embedded in the process of their acculturation. In the tradition of cross-cultural psychology, acculturation describes individual or ethno-cultural group changes in behaviour and attitudes in the situation of intercultural contact. Such cultural changes are central to the experience of ethnic minority students including newly arriving immigrants, children of immigrants and members of marginalised ethnic and racial groups. Acculturation has been described as a stressful process, and acculturation orientations adopted by young people from ethnic minority backgrounds have been shown to have an impact on their adjustment.

Purpose: The school context has been recognised to be the crucial context for acculturation of young people from ethnic minority backgrounds. The academic achievement of these students is thus embedded in the acculturation process, which involves cultural identity development, psychological adjustment and behavioural adjustment. The study is aimed at analysing and systematising the findings of empirical research on acculturation in the school context with a focus on the academic achievement of young people from minority backgrounds.

Design and methods: For this study, 29 peer-reviewed articles from a total of 348 articles that matched the search criteria in the database of the Education Resources Information Centre were selected according to inclusion criteria. The selected articles addressed academic achievement of young people from minority backgrounds in relation to at least one of the issues of acculturation such as cultural identity, psychological adjustment and behavioural adjustment. The articles were analysed by applying the method of qualitative content analysis, using MAXQDA software. The findings presented in the selected articles were analysed and integrated according to a deductively developed and inductively enriched category system.

Conclusions: Overall, the results of our analysis offer insight into issues of acculturation in relation to academic achievement. Moreover, our findings reveal the complexity of the relationship between cultural transition and school adjustment for young people. As shown in our review, although a bi-cultural orientation was predominantly positively related to school adjustment of minority students, some studies also identified assimilative attitudes as advantageous for students’ academic achievement as well as for their psychological and behavioural adjustment. Moreover, our study has also shown that young people’s acculturative attitudes may have a different impact on their school adjustment relative to acculturative behaviours.