Stepwise reductions in US density and intensity: Maintenance and extinction of conditioned suppression

Information was sought on how the strength of fear, acquired and extinguished in a classical conditioning paradigm, might be affected by certain of the circumstances that normally are associated with the course of avoidance learning. Following preconditioning exposures to the conditioned stimulus, one group of rats (Group PRF) was given continuous conditioned stimulus-unconditioned stimulus (CS-US) acquisition trials followed by stepwise reductions in US probability (given the CS) over three phases to about 11% for the final phase. Another group, Group US(lo), was given continuous CS-US pairings throughout, but, following acquisition, received stepwise reductions in US intensity (to permit evaluation of a progressively changing feature of the US over a wide range without having to employ excessive shock) over the same phases. A third group, Group US(hi), received unchanging (from acquisition) CS-US pairings over these phases, and an explicitly unpaired control group (Group RU) was included. Although outcomes differed somewhat depending upon whether suppression ratios or absolute measures of responding were considered, the major findings were that suppression to the CS was complete by the end of acquisition and persisted thereafter throughout the three phases for all but control subjects. In contrast to Group US(lo), which showed relatively little resistance to extinction of suppression to subsequent CS-only exposures, Groups US(hi) and PRF displayed marked resistance over two separate, extended sets of extinction sessions. Suppression to context cues was pronounced only for Groups US(hi) and RU, and varied as a function of US parameters and not whether the shocks were or were not signaled. Theoretical reconciliation of these findings was most difficult for Groun PRF.     

A risk‐analysis approach to implementing web‐based assessment

Computer‐Based Assessment is a risky business. This paper proposes the use of a model for web‐based assessment systems that identifies pedagogic, operational, technical (non web‐based), web‐based and financial risks. The strategies and procedures for risk elimination or reduction arise from risk analysis and management and are the means by which the quality of the system is measured. A comparison is made between the severity of risks for non‐web based systems and web‐based systems.     

Orthographic and Phonological Processes in Reading

Investigations of reading have focussed largely on two component processes, phonological processing and orthographic processing. However, a number of unresolved issues have hampered progress in the investigation of these abilities. Three such issues that formed the focus of the present study were (1) the extent to which tasks used to operationalise orthographic processing measure the same construct, (2) the extent to which tasks from a range of phonological processing domains measure the same construct, and (3) the degree to which orthographic processing tasks reflect orthographic processes independent of extraneous phonological operations, and conversely, phonological processing tasks measure phonological processes independent of orthographic processes. To address these questions, a variety of tasks used to evaluate orthographic processing (orthographic verification, homophone verification, nonlexical choice, irregular word reading, irregular word spelling), phonological processing (phoneme deletion, phonological choice, nonword reading, nonword spelling) and related domains (e.g., word identification, IQ) were administered to 177 children from Grades 3, 4 and 5. Factor analysis conducted using accuracy data revealed that orthographic processing tasks congregate along a single factor, while phonological processing tasks congregate along another, separate factor, viewed as evidence for the construct validity of orthographic processing and phonological processing, respectively. When response-time data were analysed, these same tasks did not differentiate on the basis of their orthographic and phonological demands, but rather in terms of their more general task demands. Additionally, results reveal that some phonological processing and orthographic processing tasks measure their respective construct with a greater degree of purity than do others. It is recommended that these tasks be used in future research.     

An evaluation of Wordshark in the classroom

The aim of this study was to evaluate the utility of Wordshark , a multisensory drill-and-practice computer program designed to improve children's spelling and word recognition skills. A 20-item questionnaire on the use and effectiveness of the program was sent to 1312 schools in the UK that had purchased the program, and 403 replies were received (31% response rate). The results indicated that the program was being used in both primary schools and secondary schools. In the majority of schools the program was being used with SEN pupils, and very frequently it was incorporated within Individual Education Plans (IEPs). Wordshark was principally used to practice words, to introduce new words, to find out whether children can read and spell particular words, to reinforce teaching points, and as a reward for effort and/or good work. The children were reported to enjoy using the program and almost all (96%) of respondents stated that children were better motivated when using the program than when doing other classroom work. In the vast majority of cases, significant improvements in children's reading and spelling were reported. The findings are discussed in relation to the theory and practice of computer-assisted learning.     

Typologies of Education and the Capitalist World System

Ideology is the central principle of classification in the dominant sociology of comparative education. It occupies an unchallenged a priori status in thought and research. This exaggerates the differences between capitalist and socialist education systems. The two systems do not exist and develop self‐referentially. The faults of analysis which treats the two education systems as polarised types are illustrated by juxtaposing it with a world system approach. This is used as the basis for proposing that advanced socialist societies are fully integrated into the capitalist core. Their education systems operate to both subvert and reproduce the characteristic division of power in the world system between core, periphery and semi‐periphery.     

Coordinating quality practices in Direct Trade coffee

Over the past few decades, many food niches have emerged with a specific focus on quality. In specialty coffee, micro roasters have brought about Direct Trade coffee as a way of organising an alternative around new tastes and qualities through ongoing and ‘direct’ relations to farmers and cooperatives. But Direct Trade also involves exporters. We ask, how do exporters and roasters work together in these new coffee relations, and what do they work on? We observe and participate in a situation where Colombian coffee exporters visit Danish roasters. They tour the roasting facilities and taste a number of coffees. Often, the term power is used to analyse such value chain interactions, but we argue that the term coordination better opens up these interactions for exploration and analysis. What emerges is a coordination of quality. Through touring and tasting, issues emerge and differences are laid out. We learn that quality is a continuous achievement. There is friction between the ways in which the roasters and exporters do quality, but these are not done away with through power. They are made known and discussable through the work of coordination. The activity of tasting quality is a coordination device that allows for bringing out differences in how quality is done in practice. Coffee, in this event, is not a fixed object, but shifts as issues of quality are brought up in tasting. This suggests a decentering of the object on the issue of quality.     

The key kinematic determinants of undulatory underwater swimming at maximal velocity

The optimisation of undulatory underwater swimming is highly important in competitive swimming performance. Nineteen kinematic variables were identified from previous research undertaken to assess undulatory underwater swimming performance. The purpose of the present study was to determine which kinematic variables were key to the production of maximal undulatory underwater swimming velocity. Kinematic data at maximal undulatory underwater swimming velocity were collected from 17 skilled swimmers. A series of separate backward-elimination analysis of covariance models was produced with cycle frequency and cycle length as dependent variables (DVs) and participant as a fixed factor, as including cycle frequency and cycle length would explain 100% of the maximal swimming velocity variance. The covariates identified in the cycle-frequency and cycle-length models were used to form the saturated model for maximal swimming velocity. The final parsimonious model identified three covariates (maximal knee joint angular velocity, maximal ankle angular velocity and knee range of movement) as determinants of the variance in maximal swimming velocity (adjusted-r² = 0.929). However, when participant was removed as a fixed factor there was a large reduction in explained variance (adjusted r² = 0.397) and only maximal knee joint angular velocity continued to contribute significantly, highlighting its importance to the production of maximal swimming velocity. The reduction in explained variance suggests an emphasis on inter-individual differences in undulatory underwater swimming technique and/or anthropometry. Future research should examine the efficacy of other anthropometric, kinematic and coordination variables to better understand the production of maximal swimming velocity and consider the importance of individual undulatory underwater swimming techniques when interpreting the data.     

Identifying didactic knowledge: An empirical study of the educationally critical aspects of learning about information systems

This paper backgrounds and illustrates an approach to researching didactic knowledge. Underlying the approach are some of the frameworks developed from the student learning research. Based on these frameworks the experience of learning about a particular phenomenon is theorised as having educationally critical aspects. Without addressing these aspects in learning experiences, students are highly unlikely to achieve the target understanding desired by the teacher. The approach developed to research educationally critical aspects compares scholarly and student experiences of learning about a phenomenon using the analytical framework of a structure of awareness. An application of the approach is reported in the form of a phenomenographic study which researched didactic knowledge about the concept of an information system (IS). Multiple, previously unreported, educationally critical aspects of learning about the concept of an IS were identified. Some implications of this finding for the design of IS undergraduate curricula, textbooks, teaching strategies and learning tasks are proposed. Finally, the research approach is promoted as a means to investigate didactic knowledge about other phenomena.     

Setting or mixed ability? Teachers’ views of the organisation of pupils for learning

This paper examines how staff in schools formulate decisions about pupil organisation. A small sample of primary and secondary schools from across Scotland was involved in the study.
In 1996 Her Majesty's Inspectors published a report entitled Achievement for All (SOEID, 1996) which, it was envisaged, would form the basis of school evaluations into the effectiveness of classroom organisation. This report, and in particular the six principles on which it suggested effective organisational arrangements should rest, formed the organising framework for the study.
The study had three main aims:

• 1. 

  to ascertain the extent to which the principles outlined in the HMI report had been used by school staff when making decisions about which form of organisation to use