A biologically inspired meta-control navigation system for the Psikharpax rat robot

A biologically inspired navigation system for the mobile rat-like robot named Psikharpax is presented, allowing for self-localization and autonomous navigation in an initially unknown environment. The ability of parts of the model (e. g. the strategy selection mechanism) to reproduce rat behavioral data in various maze tasks has been validated before in simulations. But the capacity of the model to work on a real robot platform had not been tested. This paper presents our work on the implementation on the Psikharpax robot of two independent navigation strategies (a place-based planning strategy and a cue-guided taxon strategy) and a strategy selection meta-controller. We show how our robot can memorize which was the optimal strategy in each situation, by means of a reinforcement learning algorithm. Moreover, a context detector enables the controller to quickly adapt to changes in the environment-recognized as new contexts-and to restore previously acquired strategy preferences when a previously experienced context is recognized. This produces adaptivity closer to rat behavioral performance and constitutes a computational proposition of the role of the rat prefrontal cortex in strategy shifting. Moreover, such a brain-inspired meta-controller may provide an advancement for learning architectures in robotics

Blistering barnacles! What language do multilinguals swear in?!

The present contribution focuses on the effects of language dominance / attrition, context of acquisition, age of onset of learning, frequency of general use of a language and sociodemographic variables on self-reported language choice for swearing. The analysis is based on a database to which 1039 multilinguals contributed through a web based questionnaire. Results suggest that, according to the self-reports, swearing happens most frequently in the multilinguals’ dominant language. Mixed instruction, an early start in the learning process, and frequent use of a language all contribute to the choice of that language for swearing. Sociodemographic variables were not found to have any effect. Frequency of language choice for swearing was found to be positively correlated with perceived emotional force of swearwords in that language. Quantitative results based on answers to close-ended questions corresponded to participants’ responses to open-ended questions

“Appropriateness” in foreign language acquisition and use: some theoretical, methodological and ethical considerations

In this contribution, I focus on the concept of “appropriateness” in the usage, the learning and the teaching of foreign languages. Using a participant-based emic perspective, I investigate multilinguals’ perceptions of appropriateness in their foreign languages. Referring to the existing literature, and using previously unpublished material collected through a web questionnaire (Dewaele and Pavlenko 2001–2003), I will show that multilinguals develop their judgements of appropriateness, a crucial aspect of sociopragmatic and sociocultural competence, as part of their socialisation in a new language/culture. However, their ability to judge appropriateness accurately does not imply that they will always act “appropriately”. Indeed, the presence of conflicting norms in their other languages may contribute to conscious or unconscious divergence from the “appropriate” norm in a particular language. Some implications for foreign language teaching will be considered

Psychological and sociodemographic correlates of communicative anxiety in L2 and L3 production

This paper analyses foreign language anxiety in the French L2 and English L3 speech production of 100 Flemish students. The findings suggest that foreign language anxiety is not a stable personality trait among experienced language learners. The societal as well as the individual contexts were found to determine levels of communicative anxiety. The perception of French as the former prestige language in Flanders and its function as a social marker was found to be linked to the participants' social class, which was, in turn, linked to levels of anxiety in French - but not in English. This social effect appeared to be a stronger predictor of communicative anxiety in French than three personality variables (extraversion, neuroticism, and psychoticism). Psychoticism, extraversion, and, to a lesser extent, neuroticism did however significantly predict levels of communicative anxiety in English L3 production. Students who scored high on the extraversion and psychoticism scales reported significant lower levels of communicative anxiety in English. Those who scored low on the neuroticism scale also tended to report lower levels of communicative anxiety in English. The same pattern emerged for communicative anxiety in French without reaching statistical significance

Further exploring the dynamicity, situatedness, and emergence of the self: The key role of context

Drawing on theoretical insights from a complex dynamic systems framework, this work explores the ways that learner selves, as they relate to learning and using languages, manifest across different contexts and timescales and emerge in interaction with various factors. First, a broad overview of dynamically-oriented L2 motivation research is provided before critically considering the need for research that aligns with conceptual advances made under the dynamic turn in SLA. In particular, this critical overview highlights a crucial need for more research employing dynamic methods capable of revealing how learner perceptions of self emerge in relation to their interlocutors and in interaction with external factors, including language ideologies that may uniquely characterize sociocultural contexts where target languages other than English are learned. The chapter concludes by discussing ways to implement dynamically oriented methodology that can provide much needed insights into the inherent dynamic, emergent, and contextually and socially embedded nature of learner selves

Using multimodal analysis to unravel a silent child’s learning

Although the English Foundation Stage Curriculum for children aged 3 to 5 years recognises that children learn through talk and play and through ‘movement and all their senses’ (DfEE & QCA, 2000: 20), there is comparatively little theoretical understanding of how children learn through diverse ‘modes’, such as body movement, facial expression, gaze, the manipulation of objects and talk, and there is little practical guidance on how practitioners can support children’s ‘multimodal’ learning. Indeed, mounting research evidence indicates that since the introduction of a national early years curriculum and early years assessment schemes, practitioners have felt under increased pressure to focus on children’s verbal skills in order to provide evidence of children’s literacy and numeracy skills in preparation for primary education (see Flewitt, 2005a & 2005b). In the context of these changes, this article relates the story of Tallulah, a 3-year-old girl with a late July birthday, who, like many summer-born children in England, spent one year in an early years setting before moving to primary school aged just 4 years. The article draws on data collected as part of an ESRC-funded study that explored the different ‘modes’ young children use to make and express meaning in the different social settings of home and a preschool playgroup (Flewitt, 2003). Examples are given of how Tallulah communicated her understandings at home through skilful combinations of talk, gaze direction, body movement and facial expression, and how others in the home supported Tallulah’s learning. These are then compared with examples of how Tallulah communicated in playgroup, primarily by combining the silent modes of gaze, body movement and facial expression. The article identifies how the different social settings of home and preschool impacted upon her choices and uses of different expressive modes