The Dominance Concept Inventory: A Tool for Assessing Undergraduate Student Alternative Conceptions about Dominance in Mendelian and Population Genetics

Despite the impact of genetics on daily life, biology undergraduates understand some key genetics concepts poorly. One concept requiring attention is dominance, which many students understand as a fixed property of an allele or trait and regularly conflate with frequency in a population or selective advantage. We present the Dominance Concept Inventory (DCI), an instrument to gather data on selected alternative conceptions about dominance. During development of the 16-item test, we used expert surveys (n = 12), student interviews (n = 42), and field tests (n = 1763) from introductory and advanced biology undergraduates at public and private, majority- and minority-serving, 2- and 4-yr institutions in the United States. In the final field test across all subject populations (n = 709), item difficulty ranged from 0.08 to 0.84 (0.51 ± 0.049 SEM), while item discrimination ranged from 0.11 to 0.82 (0.50 ± 0.048 SEM). Internal reliability (Cronbach''s alpha) was 0.77, while test–retest reliability values were 0.74 (product moment correlation) and 0.77 (intraclass correlation). The prevalence of alternative conceptions in the field tests shows that introductory and advanced students retain confusion about dominance after instruction. All measures support the DCI as a useful instrument for measuring undergraduate biology student understanding and alternative conceptions about dominance.     

Metatheoretical perspectives on sustainability journeys: Evolutionary, relational and durational

Journeys to a sustainable future have become important to industry, government and research. In this paper, we examine evolutionary, relational and durational perspectives on sustainability journeys. Each perspective emphasizes different facets of sustainability - shifts in selection environments, reconfigurations of emergent networks, and intertemporal comparisons and contrasts. Drawing on our analysis, we discuss implications for sustainability policy, strategy and research.     

Relationships among childhood maltreatment, PTSD, and health in female veterans in primary care

OBJECTIVE: Women with histories of childhood maltreatment (CM) have higher rates of physical health problems and greater medical utilization compared to women without abuse histories. This study examined whether current post-traumatic stress disorder (PTSD) symptoms mediate the relationship between CM and indicators of physical health and medical utilization in female veterans. METHOD: Respondents were 221 female veterans (56% of the potential sample), who received medical care from the San Diego VA Healthcare System during a 12-month period. Respondents provided self-report information about CM, PTSD symptoms, use of pain medication, and physical symptoms and functioning. Additional information about medical utilization was extracted from respondents' medical charts. Regression-based models were conducted to test whether PTSD symptoms mediate the relationships between CM and physical symptoms and between CM and medical utilization. RESULTS: Emotional abuse was associated with poorer role-physical functioning, increased bodily pain and greater odds of using pain medication in the past 6 months. Physical abuse was associated with poorer general health. Contrary to prediction, emotional neglect was associated with better role-physical functioning, and CM was not associated with increased healthcare utilization. PTSD was shown to mediate the relationship between emotional and physical abuse and health outcomes. CONCLUSIONS: PTSD, or psychopathology more generally, appears to be an important factor in the negative health impact of CM. Given that several empirically supported interventions are available for PTSD, there may be physical health benefits in early identification and treatment of psychopathology related to CM.     

Instructional Leadership in Practice: What Does It Look Like,and What Influence Does It Have?

Literature on school reform has emphasized the need for principals to expand beyond their traditionally administrative role and become instructional leaders. This article examines the relationship between the practice of site-based instructional leadership and the professional development that teachers received in the context of a district-wide reform effort in San Diego City Schools. Using data from teacher surveys and school-based interviews, we find a connection between aspects of principal instructional leadership (coherent school-wide vision and leaders' engagement in instructional improvement) and selected research-based characteristics of effective teacher professional development (coherence and focus on content and curriculum). We conclude by addressing some of the tensions and limitations associated with a particular vision for site-based instructional leadership.     

On Going (Way) Beyond One’s Data: A Proposal to Restrict Recommendations for Practice in Primary Educational Research Journals

To counteract what we see as a growing research-reporting concern, we propose the following editorial-policy change regarding the content of primary research articles in educational research journals: Contributors should restrict their discussion and conclusions to their data and not offer recommendations for educational practice nor speculate about the educational policy implications of their research. We believe that this change will be beneficial for maintaining a separation between evidence and opinion concerning the legitimate warrants of empirical research. We suggest viable accompaniments and alternatives to authors offering practical recommendations and policy speculations in primary-research journal articles. Among these is to rely on all sources of evidence, including systematic research syntheses based on the aggregated contribution of multiple research studies from different sources, with recommendations for practice tailored to specific situations so that both their validity and utility will be increased. It is hoped that our proposed policy change will initiate a conversation among researchers, editors, reviewers, and educational-policy experts with respect to the scope and purpose of primary research journal articles.     

Enhancing Self-Efficacy in Elementary Science Teaching With Professional Learning Communities

Emerging from Bandura’s Social Learning Theory, this study of in-service elementary school teachers examined the effects of sustained Professional Learning Communities (PLCs) on self-efficacy in science teaching. Based on mixed research methods, and a non-equivalent control group experimental design, the investigation explored changes in personal self-efficacy and outcome expectancy among teachers engaged in PLCs that featured Demonstration Laboratories, Lesson Study, and annual Summer Institutes. Significant changes favoring the experimental group were found on all quantitative measures of self-efficacy. Structured clinical interviews revealed that observed changes were largely attributable to a wide range of direct (mastery) and vicarious experiences, as well as emotional reinforcement and social persuasion.     

Toward a framework on how affordances and motives can drive different uses of scaffolds: theory, evidence, and design implications

One way to help students engage in higher-order thinking is through scaffolding, which can be defined as support that allows students to participate meaningfully in and gain skill at a task that is beyond their unassisted abilities. Most research on computer-based scaffolds assesses the average impact of the tools on learning outcomes. This is problematic in that it assumes that computer-based scaffolds impact different students in the same way. In this conceptual paper, we use activity theory and the theory of affordances to build an initial theoretical framework on how and why K-12 students use computer-based scaffolds. Specifically, we argue that affordances and motives drive how and why K-12 students use computer-based scaffolds. Then we examine empirical studies to gather preliminary support for the framework. Implications for research on and the design of computer-based scaffolds are explored.     

Investigation of Single-Case Multiple-Baseline Randomization Tests of Trend and Variability

Educational Psychology Review - Previous simulation studies of randomization tests applied in single-case educational intervention research contexts have typically focused on A-to-B phase changes...