Teachers' knowledge and misperceptions of Attention‐Deficit/hyperactivity disorder

The present study examined teachers' knowledge and misperceptions of ADHD within three specific content areas: symptoms/diagnosis, treatment, and general information (e.g., course, prevalence). One hundred and forty‐nine elementary school teachers completed the Knowledge of Attention Deficit Disorders Scale (KADDS), a new instrument designed to measure specific areas of knowledge about ADHD. Teachers' scores on the symptoms/diagnosis subscale of the KADDS were significantly greater than scores on both the treatment and general information subscales. Teacher self‐efficacy, prior exposure to an ADHD child, and years of teaching experience were all positively related to ADHD knowledge. Analysis of individual KADDS items was conducted to differentiate concepts that teachers did not know from those concepts that they believed incorrectly (i.e., misconceptions). © 2000 John Wiley & Sons, Inc.     

Self-Efficacy Beliefs and Mathematical Problem-Solving of Gifted Students

Path analysis was used to test the predictive and mediational role that self-efficacy beliefs play in the mathematical problem-solving of middle school gifted students (n= 66) mainstreamed with regular education students (n= 232) in algebra classes. Self-efficacy of gifted students made an independent contribution to the prediction of problem-solving in a model that controlled for the effects of math anxiety, cognitive ability, mathematics GPA, self-efficacy for self-regulated learning, and sex. Gifted girls surpassed gifted boys in performance but did not differ in self-efficacy. Gifted students reported higher math self-efficacy and self-efficacy for self-regulated learning as well as lower math anxiety than did regular education students. Although most students were overconfident about their capabilities, gifted students had more accurate self-perceptions and gifted girls were biased toward underconfidence. Results support the hypothesized role of self-efficacy in A. Bandura's (1986) social cognitive theory.     

Dielectrophoresis of DNA: Quantification by impedance measurements

Dielectrophoretic properties of DNA have been determined by measuring capacitance changes between planar microelectrodes. DNA sizes ranged from 100 bp to 48 kbp, DNA concentrations from below 0.1 to 70 μg∕ml. Dielectrophoretic spectra exhibited maximum response around 3 kHz and 3 MHz. The strongest response was found for very long DNA (above 10 kbp) and for short 100 bp fragments, which corresponds to the persistence length of DNA. The method allows for an uncomplicated, automatic acquisition of the dielectrophoretic properties of submicroscopical objects without the need for labeling protocols or optical accessibility.     

ARTEMIS: Reinvigorating History and Theory in Art and Design Education

ARTEMIS (Art Educational Multiplayer Interactive Space) is an online multi‐user virtual environment that is designed around the objects, artefacts, philosophies, personalities and critical discourses of the histories and theories of art and design. Conceived as a means of reinvigorating art history and theory education in the digital age, ARTEMIS addresses the specific teaching and learning needs of a new generation of art and design students in higher education. This article is a case study that addresses the second phase of the testing and design development of ARTEMIS. It builds on the findings of the initial phase, which involved the development of the ‘proof of concept’ for an online virtual world and game designed for undergraduate students in the Faculty of Art and Design at Monash University in Melbourne, Australia. Drawing on a test trial and student response survey, this article assesses whether virtual environments like ARTEMIS can generate new life in art and design history, augment the teaching and learning mix in art and design higher education, and foster new modes of active engagement amongst students.     

Developing Student Collaborations across Disciplines,Distances, and Institutions

Because quantitative biology requires skills and concepts from a disparate collection of different disciplines, the scientists of the near future will increasingly need to rely on collaborations to produce results. Correspondingly, students in disciplines impacted by quantitative biology will need to be taught how to create and engage in such collaborations. In response to this important curricular need, East Tennessee State University and Georgia Technological University/Emory University cooperated in an unprecedented curricular experiment in which theoretically oriented students at East Tennessee State designed biophysical models that were implemented and tested experimentally by biomedical engineers at the Wallace H. Coulter Department of Biomedical Engineering at Georgia Technological University and Emory University. Implementing the collaborations between two institutions allowed an assessment of the student collaborations from before the groups of students had met for the first time until after they had finished their projects, thus providing insight about the formation and conduct of such collaborations that could not have been obtained otherwise.     

Factorial and convergent validity of the Exercise Identity Scale in a German adult sample

The purpose of the present study was to examine the factorial and convergent validity of the German translation of the Exercise Identity Scale (EIS; Anderson & Cychosz, 1994). We introduce a bifactor model as a possible alternative to the previously discussed one- and two-factor models. Using an online study with 530 participants, our results suggest that the EIS should be considered a unidimensional measure. For this one-factor model, temporal invariance (time interval: 2 weeks) and invariance between men and women could be established. Relations to similar constructs were in the expected directions. We provide a psychometrically sound German version of the EIS, which demonstrated factorial and convergent validity in this study. The use of the scale in German samples is likely to advance research on exercise adoption and maintenance by integrating the exercise identity construct.     

Preferences for Explanation Generality Develop Early in Biology But Not Physics

One of the core functions of explanation is to support prediction and generalization. However, some explanations license a broader range of predictions than others. For instance, an explanation about biology could be presented as applying to a specific case (e.g., “this bear”) or more generally across “all animals.” The current study investigated how 5‐ to 7‐year‐olds (N = 36), 11‐ to 13‐year‐olds (N = 34), and adults (N = 79) evaluate explanations at varying levels of generality in biology and physics. Findings revealed that even the youngest children preferred general explanations in biology. However, only older children and adults preferred explanation generality in physics. Findings are discussed in light of differences in our intuitions about biological and physical principles.     

Premiums,announcement returns and desperation in high tech mergers: A growth options analysis

We examine the announcements of high tech mergers using a relatively new proxy for growth options we call “growth to book.” We find this adds significantly to help explain the premiums paid and announcement period abnormal returns when acquiring tech targets. Higher synergies are expected by managers and investors when targets have low growth options and acquirers have high growth options, resulting in higher premiums paid and either less negative or more positive abnormal returns. However, we find significant variation in the results by the relative size of the target and when low growth to book (GTB) firms acquire. While high GTB acquirers tend to pay more in premiums, low GTB acquirers can pay higher premiums and receive some of the most negative returns at announcement. We find evidence some acquisitions are motivated by desperation as these acquirers have the lowest GTB and do a disproportionate number of the relatively largest deals, receiving the worst abnormal returns at announcement.