Biology Undergraduates' Misconceptions about Genetic Drift

This study explores biology undergraduates' misconceptions about genetic drift. We use qualitative and quantitative methods to describe students' definitions, identify common misconceptions, and examine differences before and after instruction on genetic drift. We identify and describe five overarching categories that include 16 distinct misconceptions about genetic drift. The accuracy of students' conceptions ranges considerably, from responses indicating only superficial, if any, knowledge of any aspect of evolution to responses indicating knowledge of genetic drift but confusion about the nuances of genetic drift. After instruction, a significantly greater number of responses indicate some knowledge of genetic drift (p = 0.005), but 74.6% of responses still contain at least one misconception. We conclude by presenting a framework that organizes how students' conceptions of genetic drift change with instruction. We also articulate three hypotheses regarding undergraduates' conceptions of evolution in general and genetic drift in particular. We propose that: 1) students begin with undeveloped conceptions of evolution that do not recognize different mechanisms of change; 2) students develop more complex, but still inaccurate, conceptual frameworks that reflect experience with vocabulary but still lack deep understanding; and 3) some new misconceptions about genetic drift emerge as students comprehend more about evolution.     

Questions for Assessing Higher-Order Cognitive Skills: It's Not Just Bloom’s

We present an exploratory study of biologists’ ideas about higher-order cognition questions. We documented the conversations of biologists who were writing and reviewing a set of higher-order cognition questions. Using a qualitative approach, we identified the themes of these conversations. Biologists in our study used Bloom''s Taxonomy to logically analyze questions. However, biologists were also concerned with question difficulty, the length of time required for students to address questions, and students’ experience with questions. Finally, some biologists demonstrated an assumption that questions should have one correct answer, not multiple reasonable solutions; this assumption undermined their comfort with some higher-order cognition questions. We generated a framework for further research that provides an interpretation of participants’ ideas about higher-order questions and a model of the relationships among these ideas. Two hypotheses emerge from this framework. First, we propose that biologists look for ways to measure difficulty when writing higher-order questions. Second, we propose that biologists’ assumptions about the role of questions in student learning strongly influence the types of higher-order questions they write.     

Predicting reading growth with event-related potentials: Thinking differently about indexing “Responsiveness”

The purpose of this study was to determine if event-related potential (ERP) data collected during three reading-related tasks (Letter Sound Matching, Nonword Rhyming, and Nonword Reading) could be used to predict short-term reading growth on a curriculum-based measure of word identification fluency over 19 weeks in a sample of 29 first-grade children. Results indicate that ERP responses to the Letter Sound Matching task were predictive of reading change and remained so after controlling for two previously validated behavioral predictors of reading, Rapid Letter Naming and Segmenting. ERP data for the other tasks were not correlated with reading change. The potential for cognitive neuroscience to enhance current methods of indexing responsiveness in a response-to-intervention (RTI) model is discussed.     

Teacher perspectives on intervention sustainability: implications for school leadership

Sustainable use of academic classroom interventions is a cause for concern in the field of special education. This study examined factors that encouraged and/or deterred sustainable use of classroom interventions. Furthermore, data were collected on factors that assist teachers to implement new interventions with high perceived fidelity. A total of 174 special education teachers from two school districts completed a survey to provide feedback on interventions they had been trained on in the last two academic years. Results for both districts had several similarities. A majority of teachers sustained interventions that they perceived improved student academic outcomes and were easy to implement. Teachers identified lack of planning time followed by the need for regular training as the most important factors contributing to their perceived implementation fidelity. However, a majority of interventions teachers provided feedback on were not evidence-based practices.     

Fidelity of Implementation and Instructional Alignment in Response to Intervention Research

In this review, we explore the extent to which researchers evaluating the efficacy of Tier 2 elementary reading interventions within the framework of Response to Intervention reported on fidelity of implementation and alignment of instruction between tiers. A literature search identified 22 empirical studies from which conclusions were drawn. Results suggest that fidelity of implementation is typically monitored at Tier 2 and that alignment between tiers of intervention is often apparent yet not explicitly stated. However, researchers frequently neglect to report on fidelity of intervention in Tier 1, potentially limiting claims that can be made about the efficacy of subsequent Tier 2 intervention. Limitations and implications for future research are discussed.