positivist phenomenological

Transcription

1 Introduction to Qualitative Research RCS /26/04 According to Taylor and Bogdan (1984), two major theoretical perspectives underlie much of social science research. They are: a. the positivist tradition, which seeks facts or causes of social phenomena apart from the subjective states of individuals (Taylor & Bogdan, 1984, p. 1), b. the phenomenological perspective, which is committed to understanding social phenomena from the actor s own perspective. Quantitative Research generally stems from a positivist tradition Qualitative Research generally follows the phenomenological tradition

2 Qualitative Research: Data is collected from observations and interviews. Can be conducted in a lab or in the field. The qualitative approach yields data expressed in non-numerical terms using language and images. The qualitative approach would include summaries of discussions, interviews, and videoor audio-taping of behaviors. A qualitative description of observations would focus on patterns and themes (Grounded Theory) that emerge from language or images. Example: A common theme that emerged from talking to the students was that they needed to work and would continue to do so even if their grades suffered. a. Ethnographies, in which the research studies an intact cultural group in a natural setting during a prolonged period; b. Grounded theories, in which the researcher attempts to derive a theory by using multiple stages of data collection and the refinement and interrelationship of categories of information; c. Case studies, in which the researcher explores a single entity or phenomenon ( the case ) bounded by time and activity ; and d. Phenomenological studies, in which human experiences are examined through the detailed descriptions of the people being studies. (Creswell, 1994, pp )

3 Quantitative Research positivistic Hypotheses/deductive particularistic objective/outsider centered outcome oriented natural science worldview attempt to control variables goal: find facts & causes static reality assumed; relative constancy in life verification oriented confirmatory Qualitative Research phenomenological inductive holistic subjective/insider centered process oriented anthropological worldview relative lack of control goal: understand participant's view dynamic reality assumed; "slice of life" discovery oriented explanatory Quantitative Research Designs: Experimental Quasi-Experimental Ex post facto Correlational Descriptive Time Series/Single Subject Qualitative Research Designs: Ethnographic Grounded theory Case study Phenomenological Historical Philosophical Validity in Qualitative Research In qualitative research, validity is the correctness or credibility of a description, conclusion, explanation, interpretation, or other sort of account (Maxwell, 1996, p. 87). Validity... depends on the relationship of your conclusions to the real world, and there are no methods that can assure you that you have adequately grasped those aspects of the world that you are studying (Maxwell, 1996, p. 86).

4 Validity in Qualitative Research Whereas quantitative researchers uses methods and designs to address threats to validity in advance of the research, qualitative researchers must try to rule out most validity threats after the research has begun, using evidence collected during the research itself to make these alternative hypotheses implausible (Maxwell, 1996, p. 88). Types of Validity in Qualitative Research Description: The main threat to valid description, in the sense of describing what you saw and heard, is the inaccuracy or incompleteness of the data (Maxwell, 1996, p. 89). Interpretation: The main threat to valid interpretation is imposing one's own framework or meaning, rather than understanding the perspective of the people studied and the meanings they attach to their words and actions (Maxwell, 1996, p ). Types of Validity in Qualitative Research Theory: The most serious threat to the theoretical validity of an account is not collecting or paying attention to discrepant data, or not considering alternative explanations or understandings of the phenomena you are studying (Maxwell, 1996, p. 90). Generalization: Internal generalization, which is the type of interest to qualitative researchers, refers to the generalizability of a conclusion within the setting or group studies (Maxwell, 1996, p. 97). It is the qualitative analog of the quantitative statistical conclusion validity.

5 Qualitative Validity Tests 1. Modus Operandi Approach: Searching for clues as to whether or not [threats to validity] took place and were involved in the phenomenon in question (Maxwell, 1996, p. 92). 2. Searching for Discrepant Evidence and Negative Cases. 3. Triangulation: Collecting information from a diverse range of individuals and settings, using a variety of methods (Maxwell, 1996, p. 93). Qualitative Validity Tests 4. Feedback: Soliciting feedback from others is an extremely useful strategy for identifying validity threats, your own biases and assumptions, and flaws in your logic or methods (Maxwell, 1996, p. 94). 5. Member Checks: Systematically soliciting feedback about one's data and conclusions from the people you are studying (Maxwell, 1996, p. 94). 6. Rich Data: Collecting data that are detailed and complete enough that they provide a full and revealing picture of what is going on (Maxwell, 1996, p. 95). Qualitative Validity Tests 7. Quasi-Statistics: The use of simple numerical results that can be readily derived from the data (Maxwell, 1996, p. 95). 8. Comparison: Either through the data (e.g., multi-site studies) or through the literature. 9. Data saturation: Sampling until saturated (no new information).