Theses and Dissertations from UMD
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New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM
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Item Exploring the Use of Cognitive Apprenticeship for Teachers and Students in Science Classrooms(2019) Lee, Yewon; De La Paz, Susan; Special Education; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)The primary goal of this dissertation is to explore the use of cognitive apprenticeship (CA) with teachers and students in science classrooms. In particular, studies that make up this dissertation explore ways that teachers can improve the quality of students’ written scientific explanations and the supports that teachers need in order to promote such growth in their students. CA is a complex instructional model that is challenging for both teachers and students to use, especially in secondary classrooms. Other reports indicate the potential of CA for teaching disciplinary literacy in history classrooms, but this approach has not often been used to teach scientific writing. This project explores that, in inclusive settings with heterogeneous learners, and in an afterschool program, with students with learning disabilities (LD) and those who are English learners (ELs). The first part of the work reported here involved a systematic review of the literature on science writing instruction with these populations and with struggling learners. A total of 14 studies (three randomized control trials, nine quasi-experimental, and two single case design studies) that met established criteria as high quality studies were identified and examined to determine whether researchers were including instructional elements that have been found to be effective for these learners (e.g., cognitive and linguistic supports) and to determine learning and writing outcomes that resulted from the science writing interventions. The next project focused on an in-depth study of two middle school science teachers who participated in PD that was focused on science writing, culminating in the implementation of a CA on constructing and critiquing explanations for scientific phenomena in writing. The goal in this work was to examine how doing so impacted the teachers’ beliefs and their subsequent choice of writing tasks for their science instruction. After this PD, both teachers expressed changes in their beliefs about learners that had lasting effects on their subsequent teaching. They also believed the CA led to improved writing in their students, including their ability to engage in argumentative reasoning. This realization led to changes in other beliefs about their students in general, and about the importance of incorporating writing instruction in class. Ultimately, these changes may have affected the types of tasks they assigned in class. Prior to implementing CA, they assigned writing tasks that were close-ended, but after, they assigned analytical writing tasks like a Claim, Evidence, and Reasoning (CER) that promoted scientific reasoning. The third project in this dissertation was an intervention study (using single-case design methodology) that focused on teaching middle school students with LD and who are EL to write scientific explanations. The intervention provided cognitive supports such as procedural facilitators to guide students’ thinking. In addition, linguistic supports, such as the use of contextualized instruction on text structure, vocabulary, and grammar, and instruction on how language is used in a science was also provided to meet the needs of the sixth- and seventh-grade participants. After delivering instruction using CA (and four weeks later), students produced explanations that were rated as higher in overall quality, grammatical and lexical sophistication, and in the length of their writing. Of importance, they also made substantial gain in causal and mechanistic reasoning, which is central to good scientific writing. These findings lead us to believe that middle school science teachers who work with students with LD and those who are EL may underestimate their students’ ability to write. Contrary to their beliefs, findings from these projects suggest otherwise. Given sufficient and appropriate support such as those afforded by CA, our findings provide tentative support for the conjecture that all students, regardless of their disability status or language needs may be able to improve their reasoning and writing skills in science. CAs can be a powerful vehicle that can transform both teacher practices and student learning outcome.Item Middle-School Students Coomprehending, Analyzing, and Evaluating Persuasive Text(2008-05-30) Leon, Tina Marie; Chambliss, Marilyn J.; Curriculum and Instruction; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Students are inundated with posters, fliers, commercials, and advertisements intended to persuade. Students also are challenged to think critically about persuasion on high-stakes assessments, but their textbooks rarely include argument. Students have little experience with written persuasion and may lack the knowledge and skills necessary to comprehend and evaluate it. Research with adults has shown that prior knowledge and text characteristics affect reader persuasion. However, it is risky to design instruction for middle-school students based on adult outcomes. Thus, this study extended research on adults to middle-school students. A total of 357 middle-school students between 11 and 15 years old in grades six through eight read an argument on keeping animals in zoos structured as one-sided, two-sided refutation, or two-sided nonrefutation. Text content was emotional and factual. Students rated the persuasiveness of content during reading, rated their knowledge and beliefs before and after reading, and answered comprehension and evaluation questions. Verbal reports collected from 26 students informed how students processed persuasive text. Overall, most middle-school students' lacked adult knowledge of argument and persuasion for reasoning through the argument and its content. Most students identified persuasive text as written to inform, and selected the topic as the main point and a claim as the supporting detail. Students identified the argument in two-sided refutation more accurately. Verbal responses revealed that few students used knowledge of argument structure or persuasive content to comprehend, analyze, and evaluate. Instead, most students reacted to the content as they read and later inaccurately induced the author's purpose and argument. When evaluating premises, a majority of students selected the evidence as their source, but verbal responses indicated that students reasoned from text-based evidence, prior knowledge and their beliefs, despite selecting the evidence basis. Their particular basis depended upon the premise statement being evaluated. Students lacked knowledge of argument and persuasive content and were highly persuaded by both the emotional content and argument structure. Students rated emotional content as more persuasive than factual content. Other results suggested that one-sided argument affected students' beliefs the most. Changes in perceived knowledge mirrored changes in beliefs.Item READING COMPREHENSION COMPONENT PROCESSES IN EARLY ADOLESCENCE(2005-04-07) Cromley, Jennifer Grace; Azevedo, Roger; Human Development; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)A significant proportion of American high school students struggle with reading comprehension. Several different models might help identify the components that have the largest effect on comprehension. The current dissertation study replicates a comparison of the Construction-Integration (CI), Verbal Efficiency (VE), and Inferential Mediation (IM) models of reading comprehension, the latter model based on an extensive literature review. It then tests the fit of four variations on the IM model. Ninth-grade students ranging from 1st to 99th percentile on comprehension completed measures of background knowledge, inferencing, strategies, vocabulary, word reading and comprehension. Researcher-developed measures of background knowledge, inferencing and strategies (based on Cromley & Azevedo, 2004a) showed good reliability with this sample. A subset of the students also completed a think-aloud protocol while reading a passage from an American history textbook. These protocols were transcribed and coded using a coding scheme adapted from Azevedo, Guthrie, and Seibert (2004). As in a preliminary study, the IM model had a much better fit to the data than did the CI or VE models. The original IM Model had the best fit, explaining 66% of the variance in comprehension. All predictors made a significant contribution to comprehension, with vocabulary, background knowledge, and strategies having significant indirect effects. Vocabulary and background knowledge made the greatest total contribution to comprehension. There were large, significant differences between low- and high-comprehending participants on all of the predictor variables, except for word reading accuracy, where there were small but significant differences. The coded think-aloud protocols were largely consistent with the correlations underlying the model. Spearman rank correlations among the codes provide convergent evidence for eleven of the correlations underlying the model. The think-aloud protocols also provided convergent evidence for the validity of the paper-and-pencil measures. The current study validates and refines a new model of reading comprehension. Results suggest that both the direct and indirect effects of the components are important for comprehension. Results also suggest that vocabulary and background knowledge might first be targeted for interventions with 9th grade students who struggle with reading comprehension. Implications for future research are also discussed.