Download - Am cat workshop part 1
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Text Analysis using AmCAT
Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
8 July 2013
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Workshop outline
Workshop Outline
� Three Sessions
� 14:00 - 15:00 I: AmCAT: Introduction� 15:00 - 16:00 II: Automatic Analysis� 16:00 - 17:00 III: Manual Analysis
� Session Format
� Presentation + Hands-on
� Material
� Outline� Work book� AmCAT Manual
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
AmCAT: Introduction
AmCAT: Introduction
� The role of quantitative content analysis
� What is AmCAT?
� Getting started with AmCAT
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
AmCAT: Introduction
Quantitative Content Analysis
� Repeatable and valid
� Latent or manifest, `objective' or `subjective'
� Fixed units of measurement
� Fixed values for variables
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
AmCAT: Introduction
Quantitative Content Analysis
� Repeatable and valid
� Latent or manifest, `objective' or `subjective'
� Fixed units of measurement
� Fixed values for variables
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
AmCAT: Introduction
Manual and Auatmtic Analysis
� Content Analysis as measurement
� Coding of symbolic content to numeric values
� Interpretation / Assignment of meaning
� Automatic Analysis: instruction to computer� Manual Analysis: instruction and interpretation
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
AmCAT: Introduction
Combination of analysis techniques
1 Qualitative analysis (inductive)
2 Automtic quantitative analysis
� Measuring concepts under study� Finding interesting articles
3 Manual quantitative analysis
� Measuring concepts
4 Qualitative analysis (interpretative)
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Getting started with AmCAT (ch. 1 and 2.2)
What is AmCAT?
� Framework for text analysis
� Developed at VU University
� Open source, open data, open platform
� Main functions:
� Text storage� Automatic analysis� Manual analysis
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Getting started with AmCAT (ch. 1 and 2.2)
Key terminology
� Project
� Article
� Article Set
� Index
� Coding Job, Coding Schema, Code Book
� Navigator, Annotator, API
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Getting started with AmCAT (ch. 1 and 2.2)
Who can use it? What does it cost?
� AmCAT source code is free and open source
� VU University hosts amcat.vu.nl� Free to use for small projects
� (no support)
� Contribution requested for larger projects� (or just setup your own server)
� Development is open but centrally controlled
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Getting started with AmCAT (ch. 1 and 2.2)
Getting started with AmCAT
� Creating an account
� Creating a project
� Uploading data
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Getting started with AmCAT (ch. 1 and 2.2)
Hands-on session 1
� Create an account and project
� Upload data
� Until 15:00
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
Automatic Analysis
� Keywords as concept indicators
� Making good keyword queries
� Analysing and exporting results
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
Concepts, words, and indicators
� A Dictionary is a list of:
� Theoretical Concepts
� Operationalized using keywords
� Which are indicators for the concept
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
Example searches
(interactive demo)
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
AmCAT Query Syntax(See manual �4.2 and `search syntax help' in AmCAT)
� Connectors
� war OR conflict
� gaza AND war
� gaza AND (war OR conflict)
� (war OR conflict) NOT drugs
� Wildcards
� war*
� Phrases
� "war on drugs"
� "war drugs"~5
� "palest* (terror* OR suicide)"~10
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
Precision and recall
� Query too broad:
� Articles are found that don't contain the concept� Low precision
� Narrow query using phrases, AND/NOT conditions
� Query too narrow
� Articles are missed that do contain the concept� Low recall
� Widen query using wildcards, OR synonyms
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Finding Conceptsx in Texts using Keywords (ch. 4.1)
Testing the e�ect of widening/narrowing a search
� Search for narrow and for wide NOT narrow
� After widening a search:
� e.g. war → war*
� Search for war* NOT war, and check resultingdocuments
� After narrowing a search
� e.g. suicide → "suicide (bomb* OR attack*)"~10
� Search forsuicide NOT ("suicide (bomb* OR attack*)"~10)
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Analysing and Exporting Results (ch. 4.3)
Analysing and exporting data in AmCAT
� Trends and patterns: Tabulating data
� You can export raw data, hits, and aggregate results
(interactive demo)
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Analysing and Exporting Results (ch. 4.3)
Hands-on session 2
� Create search terms for actors and issues
� Export results
� Until 16:00
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Quantitative Content Analysis (ch. 5-7)
Quantitative manual content analysis
� Measure speci�c, known concepts in speci�c textual units
� Fixed Unit of measurement
� Sentence or Article
� Fixed sample of articles
� Fixed variables and values
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Quantitative Content Analysis (ch. 5-7)
AmCAT jargon
� Codebook: list of values for a single variable
� Coding schema: list of variables and their values
� Coding Job: Article set assigned to someone for codingusing a speci�c schema
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Quantitative Content Analysis (ch. 5-7)
Codebooks
� List of values (codes) for a single variable
� Possible hierarchical organization
� Comparable to SPSS value labels
� Issues� Economy
� Unemployment� Economic growth� . . .
� . . .
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Quantitative Content Analysis (ch. 5-7)
Coding schemas
� List of variables and their type
� Field types in AmCAT:
� Text� Number� Yes/No� Quality (-1 . . . +1)� Codebook
� Comparable to SPSS variables view
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Manual analysis in AmCAT (ch. 10)
Manual content analysis in AmCAT
(interactive demo)
� Creating a codebook and coding schema
� Selecting and assigning a sample to code
� Coding
� Exporting results
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Manual analysis in AmCAT (ch. 10)
Hands-on session 3
� Create code book, coding schema, coding job
� Code articles and export results
� Until 16:55
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Wrap-up: conclusions and road ahead?
What can AmCAT do for me? / What can I do for AmCAT?
� Use AmCAT for your coding or storage needs
� Install your own AmCAT server
� Improve AmCAT by reporting bugs, providing plugins,adding features
� Write and share (R) scripts/libraries for text-basedanalyses
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi
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Introduction I: AmCAT II: Automatic Analysis III: Manual Analysis Wrap-up
Wrap-up: conclusions and road ahead?
Programma for Thursday
� Proposal: Advanced automatic analysis:
� Tools for improving queries: cluster maps, keyword incontext
� Vocabulary analysis and LDA using the R API� Semantic Network Analysis: keyword association,grammatical analysis
Text Analysis using AmCAT Wouter van Atteveldt - Nel Ruigrok - Carina Jacobi