Effects of Linking Methods on Detection of DIF

Studies of differential item functioning under item response theory require that item parameter estimates be placed on the same metric before comparisons can be made. The present study compared the effects of three methods for linking metrics: a weighted mean and sigma method (WMS); the test characteristic curve method (TCC); and the minimum chi-square method (MCS), on detection of differential item functioning. Both iterative and noniterative linking procedures were compared for each method. Results indicated that detection of differentially functioning items following linking via the test characteristic curve method gave the most accurate results when the sample size was small. When the sample size was large, results for the three linking methods were essentially the same. Iterative linking provided an improvement in detection of differentially functioning items over noniterative linking particularly with the .05 alpha level. The weighted mean and sigma method showed greater improvement with iterative linking than either the test characteristic curve or minimum chi-square method.     

Effects of varying trial distribution,intra- and extramaze cues,and amount of reward on proactive interference in the radial maze

Rats are typically less accurate in their arm selections in the radial maze over successive trials in a session (Roberts & Dale, 1981). In the present study, rats’ choice accuracy declined when such trials were separated by 2-min (massed) but not by 2-h (spaced) intertriai intervals. Changing intramaze visual/tactile arm stimuli (Experiments 1 and 3) or extramaze landmark stimuli (Experiment 4) between trials weakened the massed-trials effect, but changing the number of food pellets per arm, either alone or in conjunction with changes in intramaze cues (Experiments 2 and 3), did not. The rats also tended to avoid the spatial locations of their last four choices on a previous trial during their first four choices on a current trial, and more so with massed than with spaced trials. These findings indicate that intertriai proactive interference (PI) occurred only with massed trials and was weakened by changing intra- and extramaze cues between such trials.     

Working together: Lessons learned from school,family, and community collaborations

Recent advances in treatment modalities and the manner in which services are organized have made it possible to serve children with severe emotional or behavioral disorders (EBD) in a more responsive and less restrictive manner. Current approaches rely on collaboration among child‐serving agencies as well as between parents and service providers. In this article, we explore the role of schools in collaborative efforts on behalf of children with EBD. The demands on school personnel in local school districts are examined, the elements required for effective collaboration are articulated, and an exemplary model of comprehensive collaboration is described. Impediments to effective collaboration are summarized, and suggestions for how to create and sustain reliable partnerships are offered at the level of individual provider and child‐serving organization. Attention is given to contextual factors, such as financing and organizational structure, and also to programmatic issues. © 2006 Wiley Periodicals, Inc. Psychol Schs 43: 419–428, 2006.     

政策和实践的困境(下)

教育政策和实践总是处在困境之中,这是困扰政策制定者和实践者的问题.本文着力从教育政策和实践所面临的困境、如何处理困境的角度,重新审视政策和实践两者的关系,并从政策目标、政策工具和实践中的能力三方面对其展开论述,以期在冲突的基础上促进教育政策和实践间的融合.     

In Their Own Words: Teachers' Reflections on Adaptability

Current research explores adaptability by gathering teachers' reflections on their adaptations. However, the field knows little of what the term adaptability means to teachers who currently teach in today's educational context. In this article, adaptability is discussed from the perspectives of 3 practicing classroom educators, teaching in various contexts (geographic region and grade level). Teachers' voices of adaptability are examined and a definition of adaptability is discussed. Obstacles are presented in these teachers' efforts to adapt their instruction in their respective contexts. Teachers then discussed the ways in which they navigated these obstacles to modify their instruction to fit a variety of learners and experiences despite these constraints.     

DEVELOPING MEDIA LITERACY SKILLS TO CHALLENGE TELEVISION'S PORTRAYAL OF OLDER WOMEN

To be old in our society is to be devalued. To be old and female is to experience double oppression. This article reports on a study that examined how television both reinforces and resists the prevailing images of older women in Western society. Two randomly selected television rerun episodes of The Golden Girls were selected to use as a trigger event with members of a graduate course in Social Work with older adults at a major southeastern university. The study found that television reflects societal discourse about aging by providing unchallenged images of older women and their lives. Given the power of television, educators and gerontologists must teach students to develop critical thinking and media literacy skills that challenge and deconstruct television's images about older women and to advocate for new programming that reflects more accurate and diverse portrayals of older women.