CAQDAS.ppt - Provalis Research

Document Sample
CAQDAS.ppt - Provalis Research Powered By Docstoc
					Contribution of Qualitative Analysis
   Software to Mixed Methods: a
           Mixed Success?

           Normand Péladeau, Ph.D.
                 President
           Provalis Research Corp.
  Two Methodological Tradition

                               SPSS, SAS,
NUMERICAL       Statistical       Stata,
  DATA          Analysis        Statistica,
                                   etc.




                                 Nvivo,
 TEXTUAL        Qualitative      Atlas.ti,
   DATA          Analysis       MaxQDA
                              HyperResearch
       Two Worlds Apart

                              SPSS, SAS,
NUMERICAL      Statistical       Stata,
  DATA         Analysis        Statistica,
                                  etc.




                                Nvivo,
 TEXTUAL       Qualitative
                                Atlas.ti,
   DATA         Analysis       MaxQDA
                             HyperResearch
           Mixed Methods


NUMERICAL         Statistical
  DATA            Analysis


                           QDA Miner

 TEXTUAL         Qualitative
   DATA           Analysis
         Two modes of integration

Partial Integration - Mixed Methods
  Parallel or sequential research processes
     quan  qual
     qual  quan
     qual + quan (with or without triangulation)


Full Integration - Mixed Models
  Mixed research process (qual / quan)
      • Integrated data collection
      • Combining / relating numeric and textual data
      • Statistical analysis of qualitative data
      • Pragmatic vision of research methods
Mixed methods in traditional CAQDAS

Integration of numerical data
 • Inclusion of sociodemographic data, responses to
   closed-ended questions, etc.
 • Limited ability to perform comparisons & no statistics


Exportation of coded data (4 steps)
 1) Export code frequency matrix to file
 2) Open statistical software
 3) Import saved matrix
 4) Run statistical analysis
    Mixed methods in QDA Miner

1) Single file format


2) Integration of statistical tools

3) Integration of other text analysis tools
Mixing data in QDA Miner
Mixing data in QDA Miner
        Mixing data in QDA Miner

                Variables




Cases
Qualitative Analysis
Qualitative Analysis & Statistics
     Qualitative Analysis & Statistics
Descriptive Statistics
  Frequency and % of codes or words
  Barcharts & Pie charts
Comparison statistics
  Crosstab (with statistical tests)
  Correspondence Analysis
  Heatmap with dual clustering
Co-occurrence of codes & similarity of documents
  Hierarchical cluster analysis
  Multidimensional scaling

Sequences of codes
   Sequences above or below chance occurences
            Mixted 3 Methods


NUMERICAL           Statistical
  DATA              Analysis


 TEXTUAL            Qualitative
  DATA               Analysis

                     Content
                     Analysis

                      Text
                      Mining

                    Information
                     Retrieval

                   Computational
                     Linguistic
       Pragmatic Assumptions
• No single method is appropriate for all
  text analysis tasks.

• A single text analysis task often profit
  from combining several methods.

• Text analysis software should facilitate
  the combination of several methods
  rather than hinder it.
Content Analysis
Content Analysis Dictionary
Content Analysis in QDA Miner
Content Analysis in QDA Miner
Content Analysis in QDA Miner
Content Analysis in QDA Miner 3.0




       +            =
Content Analysis in QDA Miner 3.0
 Information Retrieval in QDA Miner 3.0

Information Retrieval Models
     Boolean search ( AND, OR, NOT )
    Similarity search
Information Retrieval in QDA Miner 3.0

QUERY by EXAMPLE

• Find sentence or paragraphs similar to a
  given example

• Starting example can be:
     – Typed or selected text
     – Text segments associated with a code


• Relevance feedback mechanism to
  improve search results
Information Retrieval in QDA Miner 3.0

Fuzzy string matching
     Resistant to misspelling
     Matches related words

Example: “resistant to misspelling”
         “resistent to mispeling”
         “resist to misspelled words”
         “resist to words not correctly spelled”
   Automatic Document Classification
1) Training Phase


                                      Classification Rules




2) Classification of documents

   ? ? ? ? ?        Classification Rules
Automatic Classification in QDA Miner 3.0
Automatic Classification in QDA Miner 3.0




                      Classification Rules
          Benefits of Mixed3 Methods
• Provide assistance to human coders

• Speed up the numerical analysis of qualitative codings

• Speed up coding of documents (if needed)

• Gradually move from manual to automatic coding

• Identify typical and atypical examples

• Assess the reliability and validity of coding

• etc., etc.
    Obstacles for Mixing of Methods

• Paradigmatic view

• Lack of training in quantitative/qualitative
  methods

• Vocabulary issue

• Resistance to any form of computer assistance
  or automation

• Real compatibility issues between methods

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:2/26/2013
language:English
pages:31