Multidimensional Scaling Analysis of Growth and Change

Latent growth curve modeling provides a powerful and flexible tool for researchers to study individual differences in change as well as the correlates and predictors of change. Recent developments in estimation and hypothesis testing procedures are largely based on confirmatory structural equation approaches. In this article, an alternative exploratory approach is proposed for the analysis of growth and change using multidimensional scaling (MDS). When applied to growth data, it is a growth pattern recognition technique that partitions individual differences into initial level and growth pattern components. When applied to other longitudinal data, it can be used to study change patterns. A math achievement data set is used to illustrate the growth modeling method and a mood variable is used to illustrate change modeling. The strengths and limitations of the MDS growth profile analysis are discussed.     

Improving the Predictive Validity of Reading Comprehension Using Response Times of Correct Item Responses

Response times have often been used as ancillary information to improve parameter estimation. Under the dual processing theory, assuming reading comprehension requires an automatic process, a fast, correct response is an indicator of effective automatic processing. A skilled, automatic comprehender should be high in response accuracy and low in response times. Following this argument, several questions were addressed in this study. First, individuals with higher ability endorsed a correct response more quickly in the reading comprehension assessment, suggesting correct response times provide useful information in discriminating individuals of different abilities. Second, in terms of predicting an external criterion of reading proficiency, the increment of predictive validity of categorized correct response times was larger than the incremental validity of continuous response times based on both correct and incorrect response times. An index reflecting both accuracy and response time yielded higher incremental validity than indices reflecting response time only. Results support response time as manifesting a dimension of interest in its own right, over its inclusion as an ancillary dimension in a multidimensional model.     

Environmental Education Research in the Classroom: a shared methodological reflection by the teacher and the researcher

This article constitutes an attempt by a teacher and a researcher to jointly present their dual perspectives on the experience of a pilot phase of school‐based research. The discussion focuses upon the methodological difficulties that we each experienced both before, and during, the period of the research. In light of these, the article discusses concrete ways in which the methodology of the broader study could be improved, and considers the deeper issues relating to teacher‐researcher interaction which have emerged through this shared methodological reflection. We see this article as contributing to the growth of collaborative writing by researchers and research participants, and furthering the ongoing methodological dialogue within environmental education research.     

Being Alone, Playing Alone, and Acting Alone: Distinguishing among Reticence and Passive and Active Solitude in Young Children

3 forms of solitude were studied in young children—reticence (onlooker and unoccupied behavior), solitary-passive behavior (solitary-constructive and -exploratory play), and solitary-active behavior (solitary-functional and -dramatic play). 48 4-year-old children grouped in quartets of same-sex unfamiliar peers were observed in several situations. Mothers completed the Colorado Temperament Inventory. Results indicated that (1) solitary-passive, solitary-active, and reticent behaviors were nonsignificantly intercorrelated; (2) reticence was stable and associated with the demonstration of anxiety and hovering near others, whereas solitary-passive and solitary-active play were stable yet unrelated to anxiety and hovering; (3) reticence during free play was generally associated with poor performance and displays of wariness in several other social situations, while solitary-passive and -active play were not; (4) reticence was associated with maternal ratings of child shyness, while solitary-active behavior was associated with maternal ratings of impulsivity. Results are discussed in terms of the underlying mechanisms associated with reticence and passive and active withdrawal.     

Students as Partial Employees: A Metaphor for the Student-Institution Interaction

We propose a new metaphor for describing the interaction between students and their institutions of higher education, students as partial employees. Several current metaphors anchored in the quality movement are reviewed to provide a background for this new way of viewing today's college students. This article provides the readers with examples of the metaphor in use and describes why the partial employee transcends the academic and administrative structures of higher education.     

What Should Criminal Justice Interns Know? Comparing the Opinions of Student Interns and Criminal Justice Practitioners

We surveyed 118 criminal justice interns, asking them to assess the importance of various practical skills, professional skills, academic content knowledge, and knowledge of various current issues. We compared the results with those of 202 criminal justice practitioners. Student interns viewed almost every skill and knowledge area as important. Practitioners placed the greatest value on verbal communication skills, good work ethic, good work habits, and initiative. Regarding content knowledge, practitioners assigned the greatest importance to applied ethics. Racial issues as they apply to criminal justice and gender issues were viewed as most important in the current issues category. We examined the differences according to race, gender, and type of agency. We found significant differences between interns and practitioners in terms of the skills and knowledge deemed important, and significant differences between agency types. Significant differences existed based on racial and ethnic identity; differences based on gender were not significant.     

Responses of Physically Abused and Nonabused Children to Different Forms of Interadult Anger

Responses to various forms of interadult anger were examined in 2 groups of 6–11-year-olds: 44 low-SES children with a history of physical abuse and exposure to interspousal aggression, and 44 low-SES children exposed to interspousal aggression but with no history of physical abuse or other child maltreatment. Children were presented with videotaped segments of adults in angry and friendly interactions. Angry segments varied on ( a ) the type of anger expression (nonverbal, verbal, verbal-physical), and ( b ) whether anger was resolved. In general, physically abused children reported greater fear than nonabused children in response to all forms of interadult anger. Moreover, abused children appeared particularly sensitive to whether anger between adults was resolved. Findings are discussed with regard factors that may mediate relations between exposure to family violence and the development of psychopathology in children from highly aggressive home environments.     

经济为何成为印第安纳大选的关键

Evelyn Salyer is the kind of voter Republicans desperately need to hang onto this fall.     

Risk Assessment and Optimisation of Blast Mitigation Strategies for Design and Strengthening of Built Infrastructure

A probabilistic risk assessment procedure is developed which can predict risks of explosive blast damage to built infrastructure, and when combined with life-cycle cost analysis, the procedure can be used to optimise blast mitigation strategies. The paper focuses on window glazing since this is a load-capacity system which, when subjected to blast loading, has caused significant damage and injury to building occupants. Structural reliability techniques are used to derive blast reliability curves for annealed and toughened glazing subjected to explosive blast for a variety of threat scenarios. The probabilistic analyses include the uncertainties associated with blast modelling, glazing response and glazing failure criteria. Damage risks are calculated for an individual window and for windows in the facade of a multi-storey commercial building. The paper shows an illustrative example of how this information, when combined with risk-based decision-making criteria, can be used to optimise blast mitigation strategies.