Faster Teaching via POMDP Planning

Human and automated tutors attempt to choose pedagogical activities that will maximize student learning, informed by their estimates of the student's current knowledge. There has been substantial research on tracking and modeling student learning, but significantly less attention on how to plan teaching actions and how the assumed student model impacts the resulting plans. We frame the problem of optimally selecting teaching actions using a decision‐theoretic approach and show how to formulate teaching as a partially observable Markov decision process planning problem. This framework makes it possible to explore how different assumptions about student learning and behavior should affect the selection of teaching actions. We consider how to apply this framework to concept learning problems, and we present approximate methods for finding optimal teaching actions, given the large state and action spaces that arise in teaching. Through simulations and behavioral experiments, we explore the consequences of choosing teacher actions under different assumed student models. In two concept‐learning tasks, we show that this technique can accelerate learning relative to baseline performance.     

双内容样例学习的研究及重要启示

文章介绍了单内容样例与双内容样例的划分标准以及双内容样例在知识学习、技能和策略习得中应用研究的进展。作者从中获得启示,提出了根据学习域和示例域知识的熟悉程度组合不同学习难度的双内容样例并考察其学习效果、比较单内容与双内容样例学习效果的实验模式,并提出了双内容样例学习的三种认知加工模式。     

Can virtue be learned? An exploration of student learning experiences in ethics courses and their implications for influencing moral character

What does it mean to teach virtue, or to learn it? We consider this question through an institutional review board (IRB) supported research study attending to student learning experiences in undergraduate ethics courses at a Catholic university with an explicit commitment to social justice. This essay draws on and interprets qualitative data concerning the outcomes of select pedagogical approaches that involve exposing students to the experiences of others: the use of narratives; participation in structured experiential learning activities; and community engagement through deep listening and facilitated dialogue. We focus our interpretation around the implications of these pedagogies in relation to student understanding of and attitudes regarding three character traits identified as “other‐regarding” virtues in theological and philosophical scholarship – altruism, compassion, and solidarity. This paper considers the implications of these pedagogies and the practical effects of different sorts of teaching strategies on students' self‐understanding as moral agents.     

Educating for Informed Community Involvement

Service learning, which integrates community service into coursework, provides a pedagogical intervention that can promote the civic growth of students in unique and powerful ways. Research is reviewed that documents the capacity of service learning to meet learning objectives associated with a conceptual framework that focuses on the knowledge, skills, and dispositions of a civic-minded college graduate. The outcomes of service learning should facilitate these students assuming influential roles in helping others become empowered, and thereby are important for enhancing the quality of life in communities. We also review research that focuses on the impact of service learning for community outcomes. Finally, we present implications for teaching community psychology, and recommendations for future research on service learning and community engagement.     

Barriers perceived by teachers at work, coping strategies, self-efficacy and burnout

This study examines the relationships among stressors, coping strategies, self-efficacy and burnout in a sample of 724 Spanish primary and secondary teachers. We understood stressors as barriers perceived by teachers that interfere with their work meeting learning objectives and which cause them stress and burnout. An analysis of teacher responses using hierarchical regression revealed that pedagogical barriers had significant positive effects on the burnout dimensions. Furthermore, the results show not only the moderator role played by coping strategies in the pedagogical barriers-burnout dimensions relationship, but also the association between self-efficacy and the coping strategies used by teachers. Practical implications are discussed.     

The most efficient sequence of study depends on the type of test

Across three experiments featuring naturalistic concepts (psychology concepts) and naïve learners, we extend previous research showing an effect of the sequence of study on learning outcomes, by demonstrating that the sequence of examples during study changes the representation the learner creates of the study materials. We compared participants' performance in test tasks requiring different representations and evaluated which sequence yields better learning in which type of tests. We found that interleaved study, in which examples from different concepts are mixed, leads to the creation of relatively interrelated concepts that are represented by contrast to each other and based on discriminating properties. Conversely, blocked study, in which several examples of the same concept are presented together, leads to the creation of relatively isolated concepts that are represented in terms of their central and characteristic properties. These results argue for the integrated investigation of the benefits of different sequences of study as depending on the characteristics of the study and testing situation.     

Accounting for Graded Performance within a Discrete Search Framework

This article presents a process account of some typicality effects and related similarity-dependent accuracy and response time phenomena that arise in the context of supervised concept acquisition. We describe Symbolic Concept Acquisition (SCA), a computational system that acquires and activates category prediction rules. In contrast to gradient representations, SCA performs by probing for prediction rules in a series of discrete steps. For learning new rules, it acquires general rules but then incrementally learns more specific ones. In describing SCA, we emphasize its functionality in terms of accuracy and efficiency and motivate its design within the set of symbolic mechanisms and memory structures defined by the Soar architecture (Laird, Newell & Rosenbloom, 1987). For replicating human behavior, we first show how SCA exhibits some typicality effects in the course of learning responding faster and more accurately to more typical test examples. Then, using data from human experiments, we evaluate SCA's qualitative predictions on accuracy and response time on individual dataset instances. We show how SCA's predictions correlate with human data across three experimental conditions concerning the effect of instruction on learning strategy.     

Teaching the Bible and Film: Pedagogical Promises,Pitfalls, and Proposals

This article begins by recognizing the increasing use of film in Religion, Theology, and Bible courses. It contends that in many Biblical Studies (and Religious Studies and Theology) courses, students are neither taught how to view films properly, nor how to place films into constructive dialogue with biblical texts. The article argues for a specific pedagogical approach to the use of film in which students learn how to view a film closely, in its entirety, on its own terms, and in its own voice. Viewing a film in this manner by attending to its aesthetic integrity is a prerequisite for constructing a fruitful dialogue between films and biblical texts. The essay concludes with three specific examples of what this approach might look like. Two responses follow the essay; Erin Runions of Pomona College considers two additional learning goals we might consider, and Richard Ascough of Queens University at Kingston helpfully distinguishes a range of possible pedagogical goals for introducing film into the Biblical Studies classroom.     

Response times seen as decompression times in Boolean concept use

This paper reports a study of a multi-agent model of working memory (WM) in the context of Boolean concept learning. The model aims to assess the compressibility of information processed in WM. Concept complexity is described as a function of communication resources (i.e., the number of agents and the structure of communication between agents) required in WM to learn a target concept. This model has been successfully applied in measuring learning times for three-dimensional (3D) concepts (Mathy and Bradmetz in Curr Psychol Cognit 22(1):41-82, 2004). In this previous study, learning time was found to be a function of compression time. To assess the effect of decompression time, this paper presents an extended intra-conceptual study of response times for two- and 3D concepts. Response times are measured in recognition phases. The model explains why the time required to compress a sample of examples into a rule is directly linked to the time to decompress this rule when categorizing examples. Three experiments were conducted with 65, 49, and 84 undergraduate students who were given Boolean concept learning tasks in two and three dimensions (also called rule-based classification tasks). The results corroborate the metric of decompression given by the multi-agent model, especially when the model is parameterized following static serial processing of information. Also, this static serial model better fits the patterns of response times than an exemplar-based model.     

Experiential Learning and Social Justice Action: An Experiment in the Scholarship of Teaching and Learning

Abstract. This essay discusses the process and findings of an experiment on the scholarship of teaching and learning conducted in a religious ethics classroom that utilized an experiential approach to teaching and learning about social justice. The first part lays out the focus of the investigation and the pedagogical principles drawn from experiential learning theory that provided the foundation for the experiment. The second part describes all of the components of the pedagogical strategy used in the experiment, the social justice action project. The third part discusses the qualitative methodology used to gather evidence and the findings drawn from that evidence. What the evidence shows is that an experiential approach to teaching and learning about social justice can be quite effective. The essay concludes with discussions of areas for further study and the implications for the practice of others. (The survey described in this article can be found on the Wabash Center Web site〈 http://www.wabashcenter.wabash.edu/journal/glennon.html 〉).     

Designing for Online Distance Education: Putting Pedagogy Before Technology

Theological schools are increasingly exploring online distance education as a mode of course delivery. Yet while online course delivery has the potential for effective, deep learning it can also have a number of pitfalls. This article introduces online distance education and examines in detail the pedagogical possibilities for online learning by providing a number of examples drawn from online courses. While championing the use of online course delivery for theological schools, it also sounds a note of caution by advocating that the use of technology should be driven by sound pedagogical principles. Putting pedagogy before technology will insure quality education no matter what the content or mode of delivery.     

Effects of achievement motives on wrestling ability, oxygen uptake, speed of movement, muscular strength, and technical performance

In this study was tested the prediction that approach-oriented wrestlers should perform better than indifferent- and avoidance-oriented ones. The 1970 Achievement Motives Scale of Gjesme and Nyg?rd was administered to 47 boys, and subjects' scores were sampled for four different wrestling championships on international and national level. Measured were oxygen uptake, speed of movement, muscular strength, and serial performance of five wrestling holds. Approach-oriented wrestlers performed better than indifferent-oriented ones on 9 of 15 tasks. Only in international competitive situations did the approach-oriented wrestlers perform better than the avoidance-oriented ones. Results are interpreted in terms of hypotheses about achievement motivation, and pedagogical implications are discussed.     

Sensitivity to Shared Information in Social Learning

Social learning has been shown to be an evolutionarily adaptive strategy, but it can be implemented via many different cognitive mechanisms. The adaptive advantage of social learning depends crucially on the ability of each learner to obtain relevant and accurate information from informants. The source of informants’ knowledge is a particularly important cue for evaluating advice from multiple informants; if the informants share the source of their information or have obtained their information from each other, then their testimony is statistically dependent and may be less reliable than testimony from informants who do not share information. In this study, we use a Bayesian model to determine how rational learners should incorporate the effects of shared information when learning from other people, conducting three experiments that examine whether human learners behave similarly. We find that people are sensitive to a number of different patterns of dependency, supporting the use of a sophisticated strategy for social learning that goes beyond copying the majority, and broadening the situations in which social learning is likely to be an adaptive strategy.     

第二语言学习中的反馈

在第二语言学习中,反馈指针对学习者的言语行为给予学习者的评价性信息。该文阐释了反馈的概念、类型以及反馈在第二语言学习中的角色,并从反馈的时机与对象、对学习者注意力的引导、学习者认知资源的限制、情感支持等方面分析了有效反馈的特征,最后对反馈研究对我国第二语言学习与教学的意义及以后的研究方向进行了探讨     

Learning Problem‐Solving Rules as Search Through a Hypothesis Space

Learning to solve a class of problems can be characterized as a search through a space of hypotheses about the rules for solving these problems. A series of four experiments studied how different learning conditions affected the search among hypotheses about the solution rule for a simple computational problem. Experiment 1 showed that a problem property such as computational difficulty of the rules biased the search process and so affected learning. Experiment 2 examined the impact of examples as instructional tools and found that their effectiveness was determined by whether they uniquely pointed to the correct rule. Experiment 3 compared verbal directions with examples and found that both could guide search. The final experiment tried to improve learning by using more explicit verbal directions or by adding scaffolding to the example. While both manipulations improved learning, learning still took the form of a search through a hypothesis space of possible rules. We describe a model that embodies two assumptions: (1) the instruction can bias the rules participants hypothesize rather than directly be encoded into a rule; (2) participants do not have memory for past wrong hypotheses and are likely to retry them. These assumptions are realized in a Markov model that fits all the data by estimating two sets of probabilities. First, the learning condition induced one set of Start probabilities of trying various rules. Second, should this first hypothesis prove wrong, the learning condition induced a second set of Choice probabilities of considering various rules. These findings broaden our understanding of effective instruction and provide implications for instructional design.     

Situating Culturally Embodied Play Ecologies of Preschool Children: Lost in Transition

This article contributes as a commentary to Min’s critical evaluation of the challenges and resistances that have presented themselves during the recent process of changing the pedagogical practices ofChinese preschools to more closely resemble those seen in Scandinavian. The focus is on how decisions of how to structure the particular environment in preschool settings have direct and indirect implications for children’s learning and learning possibilities, and the importance of understanding these as mediated signifiers of the particular culture values. The discussions stress the importance of weighing cross-cultural pedagogical practices in terms of the functions they each serve in themselves, and in regard to the sociocultural history from which they have emerged and serve within. This means enculturation of new didactic practices should be understood as a gradual, smooth processes that allows itself to merge useful aspects of new educational models and practices with existing practices and cultural values.     

Word learning as Bayesian inference

The authors present a Bayesian framework for understanding how adults and children learn the meanings of words. The theory explains how learners can generalize meaningfully from just one or a few positive examples of a novel word's referents, by making rational inductive inferences that integrate prior knowledge about plausible word meanings with the statistical structure of the observed examples. The theory addresses shortcomings of the two best known approaches to modeling word learning, based on deductive hypothesis elimination and associative learning. Three experiments with adults and children test the Bayesian account's predictions in the context of learning words for object categories at multiple levels of a taxonomic hierarchy. Results provide strong support for the Bayesian account over competing accounts, in terms of both quantitative model fits and the ability to explain important qualitative phenomena. Several extensions of the basic theory are discussed, illustrating the broader potential for Bayesian models of word learning.     

The value of everyday examples in the teaching of learning: a comment prompted by machado and silva (1998)

Why are so few psychology students and professors interested in the study of learning? Part of the answer lies in the techniques we use for teaching behavioral psychology and communicating its relevance to numerous aspects of life. We add to this journal's discussion of the teaching of learning by explaining the importance of using examples drawn from everyday life: Numerous familiar examples provide powerful pedagogical tools for showing the importance of learning theory and helping students learn behavior principles. This approach does not exclude using other strategies and techniques in our quest to communicate the value of learning theory and teach our behavioral science in meaningful and thought-provoking ways.