Extinction of the overshadowing CS after overshadowing in conditioned taste aversion

Using a conditioned taste aversion preparation overshadowing of flavor-illness association was produced through the presentation of a second flavor during the interval between the first flavor and illness. The modulatory effects of extinguishing the association between the second (over-shadowing) flavor and illness on conditioned responding to the target flavor was investigated. In Experiment 1, we found that, following one-trial overshadowing, extinction of the overshadowing flavor had no effect on conditioned responding to the target flavor. In Experiment 2, we found a similar absence of an effect of extinction of the overshadowing stimulus in a multitrial over-shadowing paradigm. Experiment 3 confirmed the results of Experiments 1 and 2 using conditioning parameters that were designed to weaken the association between the overshadowed flavor and illness. In Experiments 4 and 5, we used simultaneous presentation of the flavors during conditioning and obtained a weakened aversion to the overshadowed flavor when the overshadowing CS was extinguished. These findings are inconsistent with previous observations in conditioned fear preparations that suggest that extinction of the association between the overshadowing stimulus and the unconditioned stimulus attenuates overshadowing. Possible reasons for the discrepant results are discussed.     

The Qualitymongers

A lot of the talk about education nowadays invokes the notion of 'quality' and it has been suggested that education in schools and universities would benefit from exposure to the kind of quality assurance procedures originally developed by industry to monitor and raise performance. The paper is critical of this suggestion, arguing that the notion of quality which has emerged from industry is a very limited one and that importing the latter into education would change our educational thinking and practice in significant ways for the worse. What we need, instead, is a fuller appreciation of the kind of quality and standards which are proper to education and which depend upon the exercise of personal judgement.     

Rubric Rating with MFRM versus Randomly Distributed Comparative Judgment: A Comparison of Two Approaches to Second-Language Writing Assessment

The purpose of this study is to explore the reliability of a potentially more practical approach to direct writing assessment in the context of ESL writing. Traditional rubric rating (RR) is a common yet resource-intensive evaluation practice when performed reliably. This study compared the traditional rubric model of ESL writing assessment and many-facet Rasch modeling (MFRM) to comparative judgment (CJ), the new approach, which shows promising results in terms of reliability. We employed two groups of raters—novice and experienced—and used essays that had been previously double-rated, analyzed with MFRM, and selected with fit statistics. We compared the results of the novice and experienced groups against the initial ratings using raw scores, MFRM, and a modern form of CJ—randomly distributed comparative judgment (RDCJ). Results showed that the CJ approach, though not appropriate for all contexts, can be as reliable as RR while showing promise as a more practical approach. Additionally, CJ is easily transferable to novel assessment tasks while still providing context-specific scores. Results from this study will not only inform future studies but can help guide ESL programs in selecting a rating model best suited to their specific needs.     

A Sorry Tail: Ability, Pedagogy and Educational Reform

This paper argues that if 'reforms'of education designed to raise standards leave unquestioned the notion of fixed differential ability, then they are likely to be self-defeating. It considers alternative ways of formulating knowledge about individual differences reflected both in the literature and in classroom practice, and concludes by making a case for further research to be undertaken to establish frameworks for teaching consistent with an anti-determinist view of individual potential.