1. A Brief Intro to Corpus Techniques in ELT Research
By Erkan Karabacak

2. Several Important Buzzwords
corpus:
corpora:
concordancer:
keyword in context (KWIC):

3. Several Important Buzzwords
corpus: a collection of texts
corpora: corpus in plural
concordancer: a search engine
keyword in context (KWIC): a list of words in context

4. Examples of Corpora •The Oxford Text Archive www.ota.ox.ac.uk
•Warwick Centre for Applied Linguistics
•Open American National Corpus

5. Examples of Concordancers
Monoconc
Wordsmith Tools
Concordance
Simple Concordance Program
WConcord
TextStat
AntConc

6. KWIC (Keyword in Context)

7. Today AntConc is our concordancer
We will use BASE and texts from our students as our corpora
We will do some simple analyses to answer some language related questions.

8. How to use AntConc? Open the read-me file online and read it.

9. How to install AntConc? By Laurence Anthony, Waseda University, Tokyo
Open Google and search for “download AntConc”

10. What will we analyze?
We need a collection of texts (corpus) of an adequate size.

11. The British Academic Spoken English Corpus
• developed at the Universities of Warwick and Reading • a collection of transcripts of lectures and seminars recorded at two universities in the UK during the period • recorded in a variety of university departments. four broad disciplinary groups, • each represented by 40 lectures and 10 seminars.

12. These groups are: • Arts and Humanities • Life and Medical Sciences
• Physical Sciences
• Social Studies and Sciences.

13. Today we will use: • Arts and Humanities , 40 text files, untagged
• Life and Medical Sciences, 40 text files, untagged
• Physical Sciences
• Social Studies and Sciences.

14. An excerpt:
…now what are you reading now he asked as i put down the book and reached for my jacket i was labouring over Troilus and Criseyde reading an essay on Criseyde's character you love this rubbish eh he laughed you'll end up an old professor wanking by the fireside putting aside your pipe and warming up your hand first i should say this is not a autobiographical work [laughter] in any s-, in any way right [laughter] er sm0003: you've said that before [laughter] nm0001: warming up your hand first [laughter] i looked at him sternly only a joke man he said with mocking reassurance only a joke i sat on the bus deep in thought trying to work out why she should have betrayed him so easily why after all those pure shy exchanges the secret glances

15. How will we analyze this corpus?
Open AntConc
FileOpen FilesSelect the files you would like to analyze by ctrl+shift (or clicking with your mouse’s left button)Open
You will see the selected files in the left window (titled “corpus files”)

16. Word List Let’s get an idea of our corpus.
What is the size of the corpus? (How many words (tokens) are there?)
How many different words (types) are there?
Click “Word List”
Make your selectionsStart

17. Concordance
Let’s search for a single word.

18. Activity 1: Some fun questions:
Which lectures are the most fun?
Which lectures did not have a lesson plan?
What part of speech mostly follows a pause?

19. How to analyze tagged corpora
<struct type="tok" from="29" to="34">
  <feat name="base" value="right" />
  <feat name="msd" value="NN" />
  </struct>
<struct type="tok" from="34" to="35">
  <feat name="base" value="," />
  <feat name="msd" value="," />
<struct type="tok" from="36" to="40">
  <feat name="msd" value="DT" />
  <feat name="base" value="this" />
  <feat name="affix" value="" />
  </struct>
<struct type="tok" from="41" to="43">
  <feat name="msd" value="VBZ" />
  <feat name="base" value="be" />
  <feat name="affix" value="s" />

20. Activity 2: Keyword Analysis
Let’s say we want to create a dictionary of medical terms.
Our analysis corpus is BAWE Life and Medical Sciences

21. Activity 3: Action Research
What are the most frequently used 10 lexical bundles by American students?
What are the most frequently used 10 lexical bundles by Chinese students?

22. What else can we do?
Of course, AntConc is not enough for every type of analysis.
An applied linguist who wishes to analyze large language data not only should know several application programs, but also learn a programming language; such as PERL

23. We can create a diachronic corpus from our students papers and observe their development.
We can tag texts for their part of speech or for other information.
We can automatically compile corpora from online sources.

24. We can do all of the above for other languages (Turkish, Chinese, Russian, and so on)
We can do EVERYTHING a linguist might need to do with texts.