Intelligent tutoring Systems (ITSs) adapt content and activities with the goals of being both effective and efficient instructional environments. They have goals for students to be challenged and guided in an optimal way--without being too overwhelmed with difficult material or too bored with easy or repetitive material. We propose a particular definition of the zone of proximal development (ZP...

The goal of dialogue practice for a second language learner is to facilitate their production of dialogue similar to that between native speakers. This paper explores the characteristics of student and tutor dialogue in terms of their differences from classic conversational and task-oriented corpora. Interlocutors have the tendency to align to the language of the other in conversational dialogu...

Many social interactions require the synchronization--be it automatically or intentionally--of one's own behavior with that of others. Using a dyadic drumming paradigm, the authors delineate lifespan differences in interpersonal action synchronization (IAS). Younger children, older children, younger adults, and older adults in same- and mixed-age dyads were instructed to drum in synchrony with ...

This paper reports on a study which examined the occurrence of ‘exploratory talk’, as defined by Barnes (1976) and Mercer (1995), amongst peers in collaborative small groups in secondary school mathematics classrooms (11 to 16 years) in a UK school. This form of talk is thought to contribute to mathematical reasoning. The classroom learning environment in which the study was undertaken is based...

Purpose: To apply educational models of the Zone of Proximal Development (ZPD) and approaches to assisted performance to existing knowledge about surgical skill acquisition, and thus provide a framework for potentially enhancing surgical education. Summary: The stages of the ZPD appear to be consistent with existing psychomotor theories of skill acquisition. The fourth phase of the ZPD, where t...

In this paper, we propose a computational approach to model the Zone of Proximal Development (ZPD) using predicted probabilities of correctness while students engage in reflective dialogue. We employ a predictive model that uses a linear function of a variety of parameters, including difficulty and student knowledge, as students use a natural-language tutoring system that presents conceptual re...

This paper sets out to present a novel construal of one of the notions of Vygotskian cultural-historical theory viz., zone of proximal development (ZPD) drawing upon dynamic systems theory. The principal thesis maintains that ZDP is an emergent and dynamic system which is engendered by a dialectical concatenation of psychogenesic and sociogenesic facets of human development over time. It is rea...

introduction: arteriovenous fistulas (avf) make chronic hemodialysis easy, but the complications are unpredictable. ischemic neuropathy due to arterial insufficiency is one of the most important complications of avf. this study was designed to evaluate ischemic neuropathy using electro diagnostic method in the extremity carrying fistula. methods: in this cross-sectional study, 37 hemodialysis p...