วันเสาร์ที่ 4 มกราคม พ.ศ. 2557

Qualitative vs Quantitative Research

Items Qualitative Research Quantitative Research
Objective / purpose
  • To gain an understanding of underlying reasons and motivations
  • To provide insights into the setting of a problem, generating ideas and/or hypotheses for later quantitative research
  • To uncover prevalent trends in thought and opinion
  • To quantify data and generalize results from a sample to the population of interest
  • To measure the incidence of various views and opinions in a chosen sample
  • Sometimes followed by qualitative research which is used to explore some findings further
Sample Usually a small number of non-representative cases. Respondents selected to fulfil a given quota. Usually a large number of cases representing the population of interest. Randomly selected respondents.
Data collection Unstructured or semi-structured techniques e.g. individual depth interviews or group discussions. Structured techniques such as online questionnaires, on-street or telephone interviews.
Data analysis Non-statistical. Statistical data is usually in the form of tabulations (tabs). Findings are conclusive and usually descriptive in nature.
Outcome Exploratory and/or investigative. Findings are not conclusive and cannot be used to make generalizations about the population of interest. Develop an initial understanding and sound base for further decision making. Used to recommend a final course of action.

Ref: http://www.snapsurveys.com/qualitative-quantitative-research/

The Analysis of Qualitative Data

The author describes a general approach to the preparation and planning of the data analysis section of a qualitative research proposal.

Diversity in qualitative analysis: multiple approaches and methods and no one right way; but also some features common to all methods; importance of the audit trail (how does researcher get from data to conclusions?)

Analytic induction: uses induction to raise the level of abstraction and to trace out relationships between concepts

Miles and Huberman: data reduction, data display, drawing and verifying conclusions
-  data reduction – reduce data without significant loss of information
-  data display – use any type of diagram to display data as analysis proceeds
-  drawing conclusions – 13 tactics suggested (Appendix 1, p347)
-  verifying conclusions – 13 tactics suggested (Appendix 1, p347)

13 tactics suggested (Appendix 1, p347) that making conceptual/theoretical coherence.
1.      noting patterns, themes
2.      seeing plausibility
3.      clustering
4.      making metaphors
5.      counting
6.      making contrasts/comparisons
7.      partitioning variables
8.      subsuming particulars into the general
9.      factoring
10.  noting relations between variables
11.  finding intervening variables
12.  building a logical chain of evidence
13.  making conceptual/theoretical coherence

13 tactics suggested (Appendix 1, p348) of getting feedback from informants.
1.      checking for representativeness
2.      checking for researcher effects
3.      triangulating
4.      weighting the evidence
5.      checking the meaning of outliers
6.      using extreme cases
7.      following up surprises
8.      looking for negative evidence
9.      making if-then tests
10.  ruling out spurious relations
11.  replicating a finding
12.  checking out rival explanations
13.  getting feedback from informants

Coding: assigning labels to pieces of data; different types and levels of coding (first level descriptive, low inference; higher levels analytic, finding patterns and/or conceptualization and/or interpreting)

Memoing: recording all ideas (substantive, theoretical methodological, etc.) that occur during coding

Abstracting and comparing: two fundamental activities in qualitative data analysis (abstracting – conceptualizing data at higher levels; comparing – similarities and difference between pieces of data or concepts)

Grounded theory analysis: open, axial, selective coding; concept-indicator model (open coding – discovering abstract concept in the data; axial coding – discovering connections between abstract concepts; selective coding – raising the level of abstraction again to the core category)

Narratives and meaning: preserving storied character of data; multiple methods of analysis; form and content

Ethnomethodology: how shared meanings and social norms are developed, maintained; focus on everyday behaviour; central role of language; conversation analysis

Discourse analysis: field of research with different approaches; the nature of discourse; its structure and relationship to hierarchies, power, ideology

Semiotics: the science of signs; language as a sign system; how language produces meaning

Documentary analysis: social production of document; social organization of document; analysis of meaning; applying different theoretical perspectives

Computers: CAQDAS; choosing software for the analysis of qualitative data


Ref: Keith Punch, Introduction to Methods in Education, Chapter 9 The Analysis of Qualitative Data, Sage, 2009: p204