Am cat workshop part 1

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

Workshop outline
Workshop Outline
ˆ Three Sessions
ˆ 14:00 - 15:00 I: AmCAT: Introduction
ˆ 15:00 - 16:00 II: Automatic Analysis
ˆ 16:00 - 17:00 III: Manual Analysis
ˆ Session Format
ˆ Presentation + Hands-on
ˆ Material
ˆ Outline
ˆ Work book
ˆ AmCAT Manual

AmCAT: Introduction
AmCAT: Introduction
ˆ The role of quantitative content analysis
ˆ What is AmCAT?
ˆ Getting started with AmCAT

AmCAT: Introduction
Quantitative Content Analysis
ˆ Repeatable and valid
ˆ Latent or manifest, `objective' or `subjective'

AmCAT: Introduction
Quantitative Content Analysis
ˆ Repeatable and valid
ˆ Latent or manifest, `objective' or `subjective'
ˆ Fixed units of measurement
ˆ Fixed values for variables

AmCAT: Introduction
Manual and Auatmtic Analysis
ˆ Content Analysis as measurement
ˆ Coding of symbolic content to numeric values
ˆ Interpretation / Assignment of meaning
ˆ Automatic Analysis: instruction to computer
ˆ Manual Analysis: instruction and interpretation

AmCAT: Introduction
Combination of analysis techniques
1 Qualitative analysis (inductive)
2 Automtic quantitative analysis
ˆ Measuring concepts under study
ˆ Finding interesting articles
3 Manual quantitative analysis
ˆ Measuring concepts
4 Qualitative analysis (interpretative)

Getting started with AmCAT (ch. 1 and 2.2)
What is AmCAT?
ˆ Framework for text analysis
ˆ Developed at VU University
ˆ Open source, open data, open platform
ˆ Main functions:
ˆ Text storage
ˆ Automatic analysis
ˆ Manual analysis

Key terminology
ˆ Project
ˆ Article
ˆ Article Set
ˆ Index
ˆ Coding Job, Coding Schema, Code Book
ˆ Navigator, Annotator, API

Who can use it? What does it cost?
ˆ AmCAT source code is free and open source
ˆ VU University hosts amcat.vu.nl
ˆ Free to use for small projects
ˆ (no support)
ˆ Contribution requested for larger projects
ˆ (or just setup your own server)
ˆ Development is open but centrally controlled

Getting started with AmCAT
ˆ Creating an account
ˆ Creating a project
ˆ Uploading data

Hands-on session 1
ˆ Create an account and project
ˆ Upload data
ˆ Until 15:00

Finding Conceptsx in Texts using Keywords (ch. 4.1)
Automatic Analysis
ˆ Keywords as concept indicators
ˆ Making good keyword queries
ˆ Analysing and exporting results

Concepts, words, and indicators
ˆ A Dictionary is a list of:
ˆ Theoretical Concepts
ˆ Operationalized using keywords
ˆ Which are indicators for the concept

Example searches
(interactive demo)

AmCAT Query Syntax
(See manual Ÿ4.2 and `search syntax help' in AmCAT)
ˆ Connectors
ˆ war OR conflict
ˆ gaza AND war
ˆ gaza AND (war OR conflict)
ˆ (war OR conflict) NOT drugs
ˆ Wildcards
ˆ war*
ˆ Phrases
ˆ "war on drugs"
ˆ "war drugs"~5
ˆ "palest* (terror* OR suicide)"~10

Precision and recall
ˆ Query too broad:
ˆ Articles are found that don't contain the concept
ˆ Low precision
ˆ Narrow query using phrases, AND/NOT conditions
ˆ Query too narrow
ˆ Articles are missed that do contain the concept
ˆ Low recall
ˆ Widen query using wildcards, OR synonyms

Testing the eect of widening/narrowing a search
ˆ Search for narrow and for wide NOT narrow
ˆ After widening a search:
ˆ e.g. war → war*
ˆ Search for war* NOT war, and check resulting
documents
ˆ After narrowing a search
ˆ e.g. suicide → suicide (bomb* OR attack*)~10
ˆ Search for
suicide NOT (suicide (bomb* OR attack*)~10)

Analysing and Exporting Results (ch. 4.3)
Analysing and exporting data in AmCAT
ˆ Trends and patterns: Tabulating data
ˆ You can export raw data, hits, and aggregate results
(interactive demo)

Analysing and Exporting Results (ch. 4.3)
Hands-on session 2
ˆ Create search terms for actors and issues
ˆ Export results
ˆ Until 16:00

Quantitative Content Analysis (ch. 5-7)
Quantitative manual content analysis
ˆ Measure specic, known concepts in specic textual units
ˆ Fixed Unit of measurement
ˆ Sentence or Article
ˆ Fixed sample of articles
ˆ Fixed variables and values

AmCAT jargon
ˆ Codebook: list of values for a single variable
ˆ Coding schema: list of variables and their values
ˆ Coding Job: Article set assigned to someone for coding
using a specic schema

Codebooks
ˆ List of values (codes) for a single variable
ˆ Possible hierarchical organization
ˆ Comparable to SPSS value labels
ˆ Issues
ˆ Economy
ˆ Unemployment
ˆ Economic growth
ˆ . . .
ˆ . . .

Coding schemas
ˆ List of variables and their type
ˆ Field types in AmCAT:
ˆ Text
ˆ Number
ˆ Yes/No
ˆ Quality (-1 . . . +1)
ˆ Codebook
ˆ Comparable to SPSS variables view

Manual analysis in AmCAT (ch. 10)
Manual content analysis in AmCAT
(interactive demo)
ˆ Creating a codebook and coding schema
ˆ Selecting and assigning a sample to code
ˆ Coding
ˆ Exporting results

Manual analysis in AmCAT (ch. 10)
Hands-on session 3
ˆ Create code book, coding schema, coding job
ˆ Code articles and export results
ˆ Until 16:55

Wrap-up: conclusions and road ahead?
What can AmCAT do for me? / What can I do for AmCAT?
ˆ Use AmCAT for your coding or storage needs
ˆ Install your own AmCAT server
ˆ Improve AmCAT by reporting bugs, providing plugins,
adding features
ˆ Write and share (R) scripts/libraries for text-based
analyses

Wrap-up: conclusions and road ahead?
Programma for Thursday
ˆ Proposal: Advanced automatic analysis:
ˆ Tools for improving queries: cluster maps, keyword in
context
ˆ Vocabulary analysis and LDA using the R API
ˆ Semantic Network Analysis: keyword association,
grammatical analysis

Am cat workshop part 1

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