Comparison of Quantitative and Qualitative Research Traditions: epistemological,theoretical, and methodological differences

There has been much discussion about quantitative and qualitative approaches to research in different disciplines. In the behavioural and social sciences, these two paradigms are compared to reveal their relative strengths and weaknesses. But the debate about both traditions has commonly taken place in academic books. It is hard to find an article that deals with the generic issues related to the quantitative and qualitative divide by drawing on distinguished research literature. Interested in addressing this need, this article aims to explain the essential characteristics of quantitative and qualitative research approaches with an emphasis on their underlying epistemological, theoretical, and methodological differences. It elucidates the research design issues and concepts in relation to both research paradigms, from planning research to collecting and analyzing data, and reporting findings. The criteria that are used to evaluate research strategies and findings are also discussed.     

Conservation Education and Environmental Communication in Great Ape Re-Introduction Projects: Two Cases From the Republic of Congo

Among species recovery tools available, re-introduction of animals to the wild is one of the more complex. Since the mid-1990s two successful great ape re-introductions have taken place in the Republic of Congo, leading some conservationists to revisit re-introduction as a strategy. This research explored the role of conservation education and environmental communication in the projects, including activities undertaken, stakeholder perceptions of success and impacts on project outcomes. The research found that education and communication activities, while varied and broad, were managed in an ad hoc, intuitive manner, lacking priority, expertise, and funding leading to recommendations for future reintroduction projects.     

Using mid-semester course evaluation as a feedback tool for improving learning and teaching in higher education

The way in which mid-semester course evaluations are structured, administered and reported is important for generating rich and high-quality student feedback for the enhancement of learning and teaching. Mid-semester evaluations usually contain open-ended questions that trigger more elaborative feedback about what is going on in a class than that from end-of-semester evaluations with Likert scale-type questions. The anonymity of the process for students and the confidentiality of the process for instructors make the process more reflective for students and less stressful for instructors. This study describes how the mid-semester course evaluation process can be used as a feedback tool for improving the quality of teaching and learning at an institutional level. Through a longitudinal analysis of 341 mid-semester course evaluation reports, positive areas and areas of concern with respect to learning and teaching were identified, and changes in student evaluations over the years were examined meticulously to make an overall evaluation of the quality of learning and teaching at a non-profit Turkish university. This research showed that the value of mid-semester course evaluations can go beyond course-level if we use open-ended questions and are able to gather the reports together to make some comprehensive analysis at university level.     

The effect of poverty on the verbal scores of gifted students

A nonexperimental design was used to determine whether the verbal scores of low-income gifted fifth graders (n = 38) differed from those of their higher income peers (n = 83). The Otis–Lennon School Ability Test, Eighth Edition and the Stanford Achievement Test-Tenth Edition were used to collect student data. Results of a MANOVA showed a statistically significant difference between the verbal scores of the two groups, with low-income students scoring significantly lower. A large effect size for the multivariate main effect of income level on verbal intelligence and verbal achievement scores was found (η² = .19). The existence of verbal–nonverbal score discrepancy in low-income students questions the practice of using only nonverbal or nonverbal parts of an IQ test to identify and place students in gifted programmes. These results also underscore the need to nurture underdeveloped verbal abilities when they occur in low-income students.     

High School Students’ Reasons for Their Science Dispositions: Community-Based Innovative Technology-Embedded Environmental Research Projects

Research in Science Education - The purpose of this investigation was to qualitatively describe high school students’ reasons for their science dispositions (attitude, perception, and...     

Potential of the acoustic micromanipulation technologies for biomedical research

Acoustic micromanipulation technologies are a set of versatile tools enabling unparalleled micromanipulation capabilities. Several characteristics put the acoustic micromanipulation technologies ahead of most of the other tweezing methods. For example, acoustic tweezers can be adapted as non-invasive platforms to handle single cells gently or as probes to stimulate or damage tissues. Besides, the nature of the interactions of acoustic waves with solids and liquids eliminates labeling requirements. Considering the importance of highly functional tools in biomedical research for empowering important discoveries, acoustic micromanipulation can be valuable for researchers in biology and medicine. Herein, we discuss the potential of acoustic micromanipulation technologies from technical and application points of view in biomedical research.     

The effects of Common Knowledge Construction Model sequence of lessons on science achievement and relational conceptual change

The purpose of this study was to investigate the effects of the Common Knowledge Construction Model (CKCM) lesson sequence, an intervention based both in conceptual change theory and in Phenomenography, a subset of conceptual change theory. A mixed approach was used to investigate whether this model had a significant effect on 7th grade students' science achievement and conceptual change. The Excretion Unit Achievement Test (EUAT) indicated that students (N = 33) in the experimental group achieved significantly higher scores (p < 0.001) than students in the control group (N = 35) taught by traditional teaching methods. Qualitative analysis of students' pre‐ and post‐teaching conceptions of excretion revealed (1) the addition and deletion of ideas from pre‐ to post‐teaching; (2) the change in the number of students within categories of ideas; (3) the replacement of everyday language with scientific labels; and (4) the difference in the complexity of students' responses from pre‐ to post‐teaching. These findings contribute to the literature on teaching that incorporates students' conceptions and conceptual change. © 2009 Wiley Periodicals, Inc. J Res Sci Teach 47: 25–46, 2010     

Multilevel Effects of Student and Classroom Factors on Elementary Science Achievement in Five Countries

This study examined the effects of individual student factors and classroom factors on elementary science achievement within and across five countries. The student‐level factors included gender, self‐confidence in science and home resources. The classroom‐level factors included teacher characteristics, instructional variables and classroom composition. Results for the USA and four other countries, Singapore, Japan, Australia and Scotland, were reported. Multilevel effects were examined through Hierarchical Linear Modelling, using the Trends in International Mathematics and Science Study 2003 fourth grade dataset. Overall, the results showed that selected student background characteristics were consistently related to elementary science achievement in countries investigated. At the student level, higher levels of home resources and self‐confidence and at the classroom level, higher levels of class mean home resources yielded higher science scores on the TIMSS 2003. In general, teacher and instructional variables were minimally related to science achievement. There was evidence of positive effects of teacher support in the USA and Singapore. The emphasis on science inquiry was positively related to science achievement in Singapore and negatively related in the USA and Australia. Recommendations for practice and policy were discussed.     

Epistemic Beliefs about Justification Employed by Physics Students and Faculty in Two Different Problem Contexts

This study examines the epistemic beliefs about justification employed by physics undergraduate and graduate students and faculty in the context of solving a standard classical physics problem and a frontier physics problem. Data were collected by a think-aloud problem solving session followed by a semi-structured interview conducted with 50 participants, 10 participants at freshmen, seniors, masters, PhD, and faculty levels. Seven modes of justification were identified and used for exploring the relationships between each justification mode and problem context, and expertise level. The data showed that justification modes were not mutually exclusive and many respondents combined different modes in their responses in both problem contexts. Success on solving the standard classical physics problem was not related to any of the justification modes and was independent of expertise level. The strength of the association across the problem contexts for the authoritative, rational, and empirical justification modes fell in the medium range and for the modeling justification mode fell in the large range of practical significance. Expertise level was not related with the empirical and religious justification modes. The strength of the association between the expertise level and the authoritative, rational, experiential, and relativistic justification modes fell in the medium range, and the modeling justification mode fell in the large range of practical significance. The results provide support for the importance of context for the epistemic beliefs about justification and are discussed in terms of the implications for teaching and learning science.     

Discipline orientations of pre‐service teachers before and after student teaching

This study examined the classroom discipline orientations of pre‐service elementary teachers both before and after the student teaching experience. Prior to beginning and immediately after completing their full‐time student teaching experience, pre‐service teachers (N = 220) from three southeastern universities in the USA completed a discipline belief instrument which identified their preferred model of classroom discipline. The results showed that the student teaching experience significantly increased beginning teachers’ preferences toward a more assertive discipline model (Rules and Consequences) and decreased their preferences toward the humanistic discipline model (Relationship–Listening). These results demonstrate that the student teaching experience may be creating a dissonance in prior knowledge and beliefs, and experiences of pre‐service teachers in classrooms. The results of the study suggest that teacher education programs can help pre‐service teachers transition more smoothly into classroom teaching by providing a school–university partnership as well as more lessons and advice on handling specific classroom management situations.