Transcript In-depth Leximancer

From Words to Meaning to Insight
Copyright Leximancer 2011
Control Panel Generate Concept Seeds
Generate Concept Seeds
 Leximancer automatically generates seeds on first
pass
 Determines word frequencies (how often a word
occurs), determines Name-like, word-like, and
compounds
 This interface provides a method to control how
this step works
 Text Processing Settings specifies how actual text
is processed
 Concept Seeds Settings controls concept seed
generation
Generate Concept Seeds
Text Processing
Check tagging for folder names and/or
file names to make tags for later comparison.
Prose off (set to 0) for
conversations, tweets,
all research
Performs stemming
but should be off for
first run
Finds tags in the loaded data.
Ex: Mike: and Therapist: associates text
following a speaker label with that person until
next speaker label.
Generate Concept Seeds
Concept Seeds
Normally do not change these options.
Control Panel Generate Thesaurus
Generate Thesaurus
 In this phase, Leximancer develops tailored dictionaries
for the concept “seeds” (starting words)
 It then generates a list of weighted terms (a thesaurus)
that constitute evidence for the presence of each
concept
 High-relevance evidence words occur commonly in
contexts where the concept is discussed in the text,
and rarely where it is not (these evidence words are
what you see in the thesaurus with their z-scores)
 Sentences may contain several concepts
Generate Thesaurus cont
 Concept Seeds allows you to edit, remove, and add
to the concepts generated from Leximancer. You
can also add your own seeds to guide Leximancer
towards your particular concepts of interest.
 Thesaurus Settings gives you the opportunity to
control how the thesaurus is created.
Generate Thesaurus: Concept Seeds
Auto Concepts: Concepts found by Leximancer.
You can edit and remove.
Auto Tags: Tags found by Leximancer. These
came from your tag settings for folder and file
names, spreadsheet column headers, dialog labels.
User Defined Concepts: Place to add your own
concepts. Used if Leximancer did not find these
numerically important.
User Defined Tags: To locate keywords relative to
concepts, but no thesaurus is generated. Example:
Insert codeword(s) into your text and Leximancer will
identify concepts around that word.
Download and Upload: Save and restore.
Sentiment Lens
 The Sentiment Lens looks at
positive and negative sentiment
in your text
 Clicking this button loads
predefined list of sentiment
terms The lens will create _favterms and _unfavterms concepts with
relationships and frequencies in the thesaurus.
 good, like,
poor and negative terms tailored to your dataset.
Listbad,
of positive
 _favterms common favorable
terms
 _unfavterms negative terms
 _negation terms under User
Defined Tags (don’t want as
concepts)
 Never, no, not, nothing
Sentiment Lens Example
 In thesaurus, click on
_unfavterms
 Lists words found with
unfavorable terms
 score is z-score
Generate Thesaurus Thesaurus Settings
Normally do not change these options.
Control Panel Run Project
Run Project Compound Concepts
This editor allows for the combination of
like concepts, synonyms, and other
possibilities into a single concept.
For this example, Fukishimi and tsunami
are combined.
Leximancer will add this new concept as
another single concept for the Concept
Map, Network Map, and all statistics.
The original two concepts will remain.
Thus, thesaurus and map for individuals
and combination for comparison.
Run Project Concept Coding Settings
The most common use of this
is to tag or kill concepts. Kill
removes all data where that
concept occurs.
Warning: Advanced feature,
will remove data. Be careful!
Tags on the map.
Run Project Project Output Settings
Normally do not change these options.
Concept Map provides control for the
Concept Map buttons defaults.
We will cover Insight Dashboard as a
separate topic.
Data Querying
 The concept map is linked to a text browser
 Valuable exploratory tool
 From the browser you can drill down into the text
 Learn what the concepts refer to
 Investigate the nature of concept relationships
 Query Tab
 Queries entire data set
 Syntax WORD: NAME: TERM: implicit coding in results
 Booleans AND and OR and NOT supported
Profiling
 Researcher creates all seeds for concepts
 Useful for large text collection where only a few themes are to be
explored; zoom into particular issue
 Process
1.
2.
3.
4.
5.
Load data
Turn off Automatic Concept Identification
Enter your concepts into Edit Emergent Seeds
Tell Thesaurus Learning how many related concepts
Run
 Concept Map with related concepts and thesaurus created
for your concepts; everything on that map relates to your
issues
The Dashboard
 Detailed data; mostly quantitative report
 Quadrant Diagram (more later)
 Must have set up Tags (folders, files, spreadsheet:
auto-generated)
 Particularly useful when you want to examine
 Attributes (independent variables)
 Certain categories (dependent variables)
Dashboard Configuration
Button on Control Panel/ Top Right
 Control Panel Run Project->Edit
Project Output Settings->Insight
Dashboard Tab
 Almost always click

Generate Insight Dashboard

Generate Quadrant Report

Include all Content Blocks

Auto Scale
 Categories: Select red text (Tags) of
interest and click arrow <===
 Attributes: Select concepts.
 Often All Concepts (word-like) and
click arrow <===
Quadrant Report
99%
Strength: If attribute is in section of text, probability it comes
from that category (tag). What topics are unique to Fox
News.
Strength
Frequency: If text is in category (tag), probability text mentions the attribute.
What is talked about most frequently on Fox News.
3%
4%
Relative Frequency
Legend
Tag1
Tag 2
33%
Quadrant Report cont
99%
Categories here mean:
Occur often and unique to tag
Categories here mean:
Occur seldom and unique to tag
Strength
Categories here mean:
Occur seldom, not unique to tag
Categories here mean:
Occur often, not unique to tag
3%
4%
Relative Frequency
Legend
Percentages
Tag1
Tag 2
33%
Data Exports
Data exports available in most tabs in Concept Map view
Export concepts, counts, scores
Useful for comparison, sharing
Backups
Other graphics programs (even Excel or Numbers)
Data Exports
Button on Control Panel/ Top Right
 Most processed data
available
 Download into
spreadsheet
 Your own
graphics package
 SPSS
 Save data
 Not sure how often
this is done
Miscellaneous
 Researcher Logbook
 Many methodologies require detailed notes
 Logs good for traceability
 Some researchers use notes, bookmarks, task lists
 Processing Log
 View Log on bottom right of Control Panel Screen
 Provides information of what Leximancer is doing
 Good source for total data counts for research papers
 Pathways
 Useful in theory-driven study start_point end-> end_point
(indirect mediating and moderating relationships)