Identification of students' mental models about the milk transformation in yogurt

A review of the scientific literature reveals that there are still few researches on the conceptions of secondary school students about chemical reactions involving microorganisms, especially those related to the mental models that students use in their explanations. This paper describes a study concerning the different mental models related to the milk transformation into yogurt with 83 students from a Spanish secondary school of 8th and 9th grade (13-16 years) developed in the framework of a research that intends to use the elaboration of this product as a context for the teaching and learning of chemical reactions through modeling approaches. In order to identify the mental models of the students, in this paper we consider the milk transformation into yogurt as a process in which its main components are: the entities involved (milk and bacteria), the interaction between them and the result (yogurt). A simplified school model of this process would involve students considering that bacteria use the sugar in milk to transform it into lactic acid through a chemical reaction to obtain the necessary energy. Using this scheme in interaction with the students' answers, the underlying mental models were identified. Although almost half of the students showed great difficulties explaining the process, five models have been identified. Students often consider the milk transformation into yogurt primarily as a physical process of agglutination or change of state. These models are far from a school model of reference in which the bacteria have a fundamental role in the transformation of milk into yogurt by a chemical reaction.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Coleridge: A computer tool for assisting musical reflection and self‐explanation

This paper examines some of the problems involved when learning how to compose music. A prototype computer‐based music tool called Coleridge is described. Coleridge was used in a study that investigated the dialogues that took place when a mentor attempted to encourage creative reflection in students. Results of dialogue analysis suggested that because learners seem unable to make accurate predictions about how a musical phrase will sound, there is a real need for a computer‐based learning assistant. Finally, the paper reports on how these findings were used to motivate the design of a mentor's assistant in a new version of Coleridge

Specifying computer-supported collaboration scripts

Collaboration scripts are activity programs which aim to foster collaborative learning by structuring interaction between learners. Computer-supported collaboration scripts generally suffer from the problem of being restrained to a specific learning platform and learning context. A standardization of collaboration scripts first requires a specification of collaboration scripts that integrates multiple perspectives from computer science, education and psychology. So far, only few and limited attempts at such specifications have been made. This paper aims to consolidate and expand these approaches in light of recent findings and to propose a generic framework for the specification of collaboration scripts. The framework enables a description of collaboration scripts using a small number of components (participants, activities, roles, resources and groups) and mechanisms (task distribution, group formation and sequencing)

Care concept in medical and nursing students' descriptions: philosophical approach and implications for medical education

Introduction. Care is seen as something that is peculiar to the medical sciences but its meaning and status for physicians and nurses differs. Objectives. The aim of this research was to learn how nursing and medical students understand and define care, and how their definition and views on their practice of caring change as they advance through their studies. Material and methods. The study was conducted among two groups of students: before and after their first practicum (n=102). Analysis of the students' answers was carried out using Colaizzi's phenomenological descriptive methodology, which means that a qualitative approach was used. Results. The qualitative analysis shows that the medical and nursing students define care in the same way, using 9 main categories: compassion, commitment, competence, confidence, conscience, communication, patience, courage and support. The nursing students viewed their caring to be within both practical and emotional dimensions and this was a core feature of their identity as nurses. Medical students, on the other hand, viewed the practical dimension of care as an additional activity. All the students in the study underlined the importance of having time to care and showed that, for them, 'time' in this context has a moral meaning. What was interesting to the research team centered on the initial attitudes to 'caring' from both medical and nursing students. Conclusions. We found that students of both nursing and medicine do not begin their studies with different attitudes and concepts of care. However, after their initial exposure to practical placements a process begins which forges different identities around the concept of care. This implies trends in the division of professional roles during their initial education

Beetle II: an adaptable tutorial dialogue system

We present BEETLE II, a tutorial dialogue system which accepts unrestricted language input and supports experimentation with different dialogue strategies. Our first system evaluation compared two dialogue policies. The resulting corpus was used to study the impact of different tutoring and error recovery strategies on user satisfaction and student interaction style. It can also be used in the future to study a wide range of research issues in dialogue systems.

Removing opportunities to calculate improves students' performance on subsequent word problems.

BackgroundIn two studies we investigated whether removing opportunities to calculate could improve students' subsequent ability to solve similar word problems. Students were first asked to write explanations for three word-problems that they thought would help another student understand the problems. Half of the participants explained typical word problems (i.e., problems with enough information to make calculating an answer possible), while the other half explained the same problems with numbers removed, making calculating an answer impossible. We hypothesized that removing opportunities to calculate would induce students to think relationally about the word problems, which would result in higher levels of performance on subsequent transfer problems.ResultsIn both studies, participants who explained the non-calculable problems performed significantly better on the transfer test than participants who explained the typical (i.e., calculable) problems. This was so in spite of the manipulation not fully suppressing students' desire to calculate. Many students in the non-calculable group explicitly stated that they needed numbers in order to answer the question or made up numbers with which to calculate. There was a significant, positive relationship between the frequency with which students made up numbers and their self-reported mathematics anxiety.ConclusionsWe hypothesized that the mechanism at play was a reduction in instrumental thinking (and an increase in relational thinking). Interventions designed to help students remediate prior mathematical failure should perhaps focus less on the specific skills students are lacking, and more on the dispositions they bring to the task of "doing mathematics.

Barriers and facilitators to GP-patient communication about emotional concerns in UK primary care: a systematic review.

Background In the UK, general practitioners (GPs) are the most commonly used providers of care for emotional concerns. Objective To update and synthesize literature on barriers and facilitators to GP–patient communication about emotional concerns in UK primary care. Design Systematic review and qualitative synthesis. Method We conducted a systematic search on MEDLINE (OvidSP), PsycInfo and EMBASE, supplemented by citation chasing. Eligible papers focused on how GPs and adult patients in the UK communicated about emotional concerns. Results were synthesized using thematic analysis. Results Across 30 studies involving 342 GPs and 720 patients, four themes relating to barriers were: (i) emotional concerns are difficult to disclose; (ii) tension between understanding emotional concerns as a medical condition or arising from social stressors; (iii) unspoken assumptions about agency resulting in too little or too much involvement in decisions and (iv) providing limited care driven by little time. Three facilitative themes were: (v) a human connection improves identification of emotional concerns and is therapeutic; (vi) exploring, explaining and negotiating a shared understanding or guiding patients towards new understandings and (vii) upfront information provision and involvement manages expectations about recovery and improves engagement in treatment. Conclusion The findings suggest that treatment guidelines should acknowledge: the therapeutic value of a positive GP–patient relationship; that diagnosis is a two-way negotiated process rather than an activity strictly in the doctor’s domain of expertise; and the value of exploring and shaping new understandings about patients’ emotional concerns and their management