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Quantitative, Qualitative, and Mixed Research: Characteristics and Differences

This PowerPoint presentation by Roger Pence explores the characteristics, types, and differences between quantitative, qualitative, and mixed research. It covers topics such as variables, experimental and non-experimental research, research paradigms, and the benefits of mixed research.

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Quantitative, Qualitative, and Mixed Research: Characteristics and Differences

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  1. Chapter 2: Quantitative, Qualitative and Mixed Research A PowerPoint presentation by Roger Pence

  2. Learning Objectives • Describe the characteristics of quantitative research • List and explain the different types of variables used in quantitative research • Explain the difference between experimental and nonexperimental research • Describe the characteristics of qualitative research • List and explain the differences among the different types of qualitative research • Describe the characteristics of mixed research

  3. What is a research paradigm? • The set of shared perspectives, values, assumptions, concepts and practices shared by a community • An approach to thinking about and doing research

  4. What is meant by the “incompatibility thesis”? • A notion or belief that both quantitative and and qualitative research cannot exist in the same research study. (An either-or position) • The incompatibility thesis has been pushed out of favor by pragmatism, which states that whichever approach, even a mixture, that best answers the question should be used.

  5. The Research Continuum

  6. Salient characteristics of the three paradigms

  7. Emphasis of each Research Paradigm

  8. Research Paradigm Emphasis Continued…

  9. Research Paradigm Emphasis Continued…

  10. Research Paradigm Emphasis Continued…

  11. Quantitative Research Methods Terms • Variable: Condition or characteristic that can take on different values or categories • Constant: A single category of a variable • Quantitative Variable: Varies by degree or amount (e.g. income) • Categorical Variable: Varies by type or kind (e.g. religion) • Independent Variable: Presumed to change another variable • Dependent Variable: Influenced by independent variable

  12. Quantitative Research: Cause and Effect • Changes in independent variable produce changes in dependent variable (one changes causes another) • Example: More fertilizer produces bigger plants

  13. Quantitative Research Terms: Other Variables • Intervening Variable: A variable that stands between the independent and dependent variable and may also explain changes observed in the dependent variable Moderator Variable: Changes the relationships between other variables (e.g. teaching delivery and personality style)

  14. Quantitative Research:Experimental Research • Used to determine cause and effect relationships through manipulation of independent variable. • Must consider extraneous variables (a variable that may compete with the independent variable and change the experimental outcome) • What if the results are due to some other factor?! • Must also consider confounding variables (variable that was not controlled) • Sorry, we couldn’t do anything about that!

  15. Quantitative Research:Non-Experimental Research • No manipulation of the independent variable and no random assignments to groups • Causal-comparative research: Primary independent variable of interest is a categorical variable (like religion, gender, etc.) • More difficult to establish cause and effect relationships • Correlational research: Primary independent variable of interest is quantitative (how does an amount of an independent variable change the dependent variable?)

  16. Quantitative Research:Correlation Coefficients • Positive correlation: When the variable move in the same direction • Negative correlation: When the variables move in opposite directions • Strength of correlation: Ranges from +1 to -1 with 0 representing no correlation at all

  17. Qualitative Research Methods • Phenomenology: How does the experience of a phenomenon affect something? • Example: How does divorce affect learning? • Ethnography: Interest in how a group’s culture influences a question. • Example: Do skateboarders have a better innate understanding of physics?

  18. Qualitative Research Methods • Case Study Research: Detailed account(s) of one or more cases • Example: Students using filmmaking to learn science • Grounded theory: Generating and developing a theory from qualitative research • Example: Factors that affect student’s homework turn-in rate • Historical Research: Research about people, places and events from the past • Example: How did Sputnik affect science education?

  19. Mixed Research • Fundamental principle of mixed research: It is wise to collect multiple sets of data using different research methods to “cover holes” that might exist with only one type of research. • Allows confidence to be placed in findings arrived at from more than one angle. • If data suggests conflicting conclusions, then more research will be needed to explore the phenomenon. • The mixed approach often best answers questions in a complex and ever-changing world.

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