Effects of manipulating relative and absolute motion information during observational learning of an aiming task.

In the visual perception perspective of observational learning, the manipulation of relative and absolute motion information in visual demonstrations optimally directs learners' search towards appropriate task solutions. We assessed the effect of emphasizing transformational information and removal of structural information using point-light kinematic displays in approximating the model's relative motion patterns. Participants viewed computer-simulated point-light demonstrations or normal video demonstrations before and intermittently throughout 100 acquisition trials with knowledge of results on an underarm modified-dart aiming task. On the next day, all participants performed 20 retention trials without demonstrations. The kinematics of spatial and temporal coordination and control variables were examined relative to the model's action, as well as performance scores. The results indicated that approximation of the model's spatial and temporal coordination and control patterns was achieved after observation of either type of demonstrations. No differences were found in movement outcomes. In a second experiment, the effects of manipulating absolute motion information by slow-motion demonstrations were examined relative to real-time demonstrations. Real-time demonstrations led to a closer approximation to the model's spatial and temporal coordination patterns and better outcome scores, contradicting predictions that slow-motion displays convey intact relative motion information. We speculate that the effect of visual demonstration speed on action perception and reproduction is a function of task constraints--that is, novelty or familiarity of relative motion of demonstrated activities.     

Diversity and Mentoring in the Workplace: A Conversation with Belle Rose Ragins

Given projected increases in workplace diversity, an understanding of diversity’s intersection with mentoring is a critical topic in the literature. This article involved an interview with Belle Rose Ragins, one of the world’s leading thinkers on diversity and mentoring in the workplace. After providing an overview of Ragins’ key achievements and contributions to the mentoring literature, the article delved into the interview, which involves four parts: (a) Ragins’ education and early influences; (b) her views on the extant literature as well as insights around future areas for inquiry; (c) her current research interests; and (d) her views on consulting and teaching.     

The application of cognitive learning theory to criminal justice education

Most criminal justice programs began as extensions of vocational technical training courses, but within the last decade they have begun to parallel the liberal arts programs originally proposed. As a result of this reorientation, criminal justice instructors lack many of the instructional methods used by colleagues in other fields. In addition, the dual nature of criminal justice instruction, requiring both experience and theory, places demands on criminal justice instructors that their colleagues may not experience. The field needs an instructional approach that blends the best of the vocational aspects and the theoretical underpinnings. This paper reviews cognitive learning theory, specifically Kolb's experiential learning model. Recommendations are offered for the application of this model to instruction in criminal justice courses.     

Relationships Among Measures as Empirical Evidence of Validity: Incorporating Multiple Indicators of Achievement and School Context

In this article we examine empirical evidence on the criterion, predictive, transfer, and fairness aspects of validity of a large-scale language arts performance assessment, referred to as the Performance Assignment (PA). We use multilevel models to avoid biased inferences that might result from the naturally nested data. Specifically, we examine the relationships of the assessment with the Stanford Achievement Test, 9th Edition and the California High School Exit Examination. The results indicate that the measures are related, that students demonstrate a degree of transfer, and that the language arts PA is relatively more fair than comparison assessments. The results are robust to various model specifications and demonstrate that benefits do not accrue to all students equally.     

Assignments as a Pedagogical Tool in Learning to Teach Science: A Case Study

Fostering student teachers' confidence and competence to teach science in early childhood settings is a complex and challenging task for teacher educators situated in university classrooms. The research reported in this paper is based on an analysis of 3rd-year early childhood student teachers' assignments. The assignment required them to interview young children in order to find out what the children knew about a specified science topic. Three themes emerged from a constant comparison analysis. The first was the artificiality of the situation as constrained by the task. The second was the importance of sound subject knowledge in being able to ask questions of the children that were not misleading or difficult to answer. The third theme encompassed the difficulties associated with engaging young children in meaningful conversations. As a result of this analysis, the assignment task was modified to enable student teachers to work in more pedagogically appropriate and authentic ways.     

Measures of Information Seeking: A Validation Study in the Context of Nonmedical Drug Use Behaviors

Health information is readily available and easily obtained from a variety of media and interpersonal sources. Although several studies have examined health-related information seeking, a comprehensive validation study of this measure is still needed. This study uses a longitudinal cohort study of Israeli university students (N = 800) aged 18–30, and a cross-sectional sample of U.S. college students (N = 498) to validate measures of information seeking about the nonmedical use of two drugs (marijuana and amphetamines) from a range of media and interpersonal sources. Information seeking measures for both drug types showed good convergent, discriminant, nomological, and test-retest validity. Results offer support for the use of these measures as valid indicators of the constructs for which they were designed. Implications for the use of these measures in future research are discussed.     

The Sensitivity of Value-Added Teacher Effect Estimates to Different Mathematics Achievement Measures

Using longitudinal data from a cohort of middle school students from a large school district, we estimate separate "value-added" teacher effects for two subscales of a mathematics assessment under a variety of statistical models varying in form and degree of control for student background characteristics. We find that the variation in estimated effects resulting from the different mathematics achievement measures is large relative to variation resulting from choices about model specification, and that the variation within teachers across achievement measures is larger than the variation across teachers. These results suggest that conclusions about individual teachers' performance based on value-added models can be sensitive to the ways in which student achievement is measured.     

The good,the bad and the wiki: Evaluating student‐generated content for collaborative learning

This paper explores the potential for wiki‐type open architecture software to promote and support collaborative learning through the use of student‐created content. It delineates some of the affordances and constraints of wiki software as an open architecture that has the potential to facilitate collaborative learning through community‐focused enquiry. It seeks to promote debate in this key area of development, and highlights some recent key contributions to the developing discourse on social software in what has been termed ‘the architecture of participation’.