The role of inhibitory associations in perceptual learning

Preexposure to two compound flavors (AX and BX) typically enhances their discriminability: An aversion conditioned to AX will generalize less to BX, especially if the preexposure regime has involved alternated presentations of AX and BX rather than presenting all AX trials before BX trials (or vice versa). One possible explanation of this finding is that alternating preexposure establishes inhibitory associations between the two unique features A and B, thus counteracting the generalization produced by excitatory associations between X and A and between X and B, which might result in either the retrieval of B on a conditioning trial to AX, or the retrieval of A on a test trial to BX. Three experiments on flavor aversion conditioning in rats tested these predictions. Experiment 1 suggested that the more important of these excitatory associations was that which allowed X to retrieve A on the test trial to BX. Experiment 2 suggested that the more important inhibitory association was that which allowed B to inhibit the representation of A on this test trial. Experiment 3 provided direct evidence of the role of this inhibitory B⊣A association.     

Attentional changes in blocking are not a consequence of lateral inhibition

In three human causal learning experiments, we examined attentional modulation in the blocking task, in which participants typically learn little about a novel cue B when it is paired with a previously trained, predictive cue A. Evidence indicates that this blocking training led to a decrement in attention to the blocked cue B. The present experiments addressed whether this decrease in attention to the blocked cue could be better explained as being due to lateral inhibition from the pretrained cue A to the blocked cue B, or as a cue-specific property that is not conditional on the presence or absence of other stimuli. Strong effects of learned predictiveness were observed on participants’ causal judgments (Experiment 1) and choice behavior (Experiments 2 and 3). However, no evidence for lateral inhibitory processes emerged in any of the experiments, despite explicit attempts to maximize experimental sensitivity to this effect. The results are discussed in the context of formal models of the operation of attentional processes in human and animal learning.     

Policy ‘partnerships’? Power dynamics in curriculum reform

In curriculum policy, discourses of ‘policy partnerships’ and ‘communities of practice’ have become increasingly prevalent and were reflected in Western Australian curriculum policy processes from the mid‐1990s to the late 2000s – a period of significant, highly contested change. This paper presents the findings of an empirical study into the impact of curriculum reform on the changing dynamics within and between the government and non‐government education sectors, drawing on critical theory and post‐structuralist approaches to policy analysis within a broader framework of policy network theory. This approach is used to highlight power issues at all levels of the policy trajectory. This research found that despite policy discourses of collaborative and consultative processes to create a ‘shared’ curriculum, the government and non‐government education sectors remain largely distinct due to significant power differentials, as well as structural and cultural differences. The analysis reveals three closely connected emergent themes – limited collaboration, regulated consultation and enhanced state control of curriculum policy agendas. It is argued here that although discourses of ‘policy partnerships’ and ‘community of practice’ are increasingly evidenced in contemporary curriculum policy, they do not take sufficient account of embedded hierarchical power relationships. Further, such discourses can be used as legitimisation strategies to promulgate policy changes which enhance the steerage capacity of the state. Deeply entrenched power differentials operate simultaneously to distort policy partnerships and communities of practice, by both including and excluding particular sets of policy actors.     

加拿大高等学校的网络教育

网络教育究竟是新的突破,还是对传统的破坏?它能否为学生提供优质的服务,或许它将破坏加拿大良好的现行教育体制?加拿大高校的网络教育正在探索中,它与全球化网络教育所面临的主要问题相似。     

Wallerstein’s world-systems analysis in comparative education: A case study

Since the 1970s, using his world-systems analysis, Immanuel Wallerstein has developed a wide-ranging framework for the social sciences, with potential applications for comparative educational research. In this paper we outline key aspects of Wallerstein’s theorising, and then analyse the uptake, understandings, and applications of his analysis in the field of comparative and international education, through a case study of the Comparative Education Review (CER) journal from 1980 to 2008. This paper examines how, and how widely, his analysis has been adopted and interpreted. Our analysis highlights significant and—given the broader emphasis in comparative education on questions of education and development—surprising absences in the application of this approach. We conclude by arguing for the use and development of three critical features of his analysis in comparative work, as relevant and timely interventions in the field.     

A Card Trick for Improving Writing Skills and Attendance

This paper describes an innovative way of randomly collecting handwritten homework in calculus classes with approximately 50 students using a standard deck of cards, which does not place an excessive burden on faculty with regard to grading. In addition to the increased awareness students develop in structuring a mathematical solution, the strategy has been successful in increasing classroom attendance, which the literature suggests leads to increased attainment. Along with personal observations and empirical data indicating that the scores from the randomly collected homework assignments strongly correlate with exam performance, perceptions of students are included, which show that students are strongly supportive of the method used.     

Maximising meaning: creating a learning environment for reading comprehension of informative texts from a Vygotskian perspective

Sociocultural theories based on the work of Vygotsky have been increasingly influential in educational sciences. Developmental education (DE) is a pedagogical approach based on Vygotskian theory that has inspired primary schools in the Netherlands to change the learning environment innovatively in a comprehensive way. In this article, we focus on the learning environment for reading comprehension of informative texts in upper-primary grade classrooms in DE. Our aim is to contribute to a more profound understanding of the characteristics of learning environments that are inspired by a Vygotskian approach and that are conducive to reading comprehension of informative texts. Five fourth-grade expert DE teachers participated in a multiple case study aimed at describing and analysing these characteristics for the domain of reading informative texts. Data were collected over a period of six to eight weeks for each teacher and consisted of videotaped interviews, classroom observations and documents. We conclude that DE learning environments are focused on maximising meaning from text for students. This is achieved by organising learning on the basis of emergent goals within students’ participation in sociocultural practices.