OverviewTeaching: 10 min
Exercises: 10 minQuestions
What are collocates?
How do collocates work in AntConc?
What conclusions can be reached based on collocation data?Objectives
Learn how collocates work in AntConc
The collocates of a word are those words that tend to occur in proximity to that word more than they occur in proximity to all other words in the corpus. The idea of collocation is implemented using a variety of different statistics to determine the co-occurrence of words.
Click on the
Collocates tab, enter the string “behind” in the search box, ensure that
Words is ticked and
Case is unticked, change
Sort by to
Sort by Freq, then press
Start. After a little time an error will pop up.
AntConc tab interdependencies
- Outputs in the
Collocatestab are based on data generated by the
Word Listtab, so both need to have the same
Tool Preferencesfor the
Collocatestab to work properly.
- In this case, go to
Tool Preferences, untick
Treat all data as lowercase, hit
Apply, and then hit
- The moral here then is that in AntConc any search needs to be undertaken with care. For
Collocatesin particular, you need to know exactly what you’ve searched for in order to read the statistical output.
AntConc then presents a slightly confusing screen. It contains the following information:
- A ranking of words by frequency, specifically - using the default
Collocatessettings - those five words either side of the word “behind”. The proximity to the searched for word can be changed in the bottom right of the screen, more on which shortly.
- The frequency of the word, broken down into two columns: one by frequency to the left of the word “behind”, and one by frequency to the right of the word “behind”.
Stat(more on which shortly).
Browsing this we can start to make some observations, building on similar themes from episodes five and six. We see many commons words (“the”, “of”, “and”, “a”). We see that men (“him”, “Sir”, “his”, “man”) and actions (“standing”, “seated”) are related to this spatial term. And we see a long tail of vocabulary, 855 of the 1136 unique words (or about 3 in 4) occur only once in proximity to the word “behind’.
Now edit the
To.. settings to
1R respectively, and hit
Start again. A few things stand out:
- Some high frequency words have zero or very small frequencies on one or either side of “behind”;
- Some words have jumped up the list (“him” from 14 to 3, “her” from 22 to 11, “hillside” from 57 to 14);
- Commons words (“the”, “and”, “a”, “is”) have
Statvalues of two or lower.
This output tells us something about both language use and the subject of the cataloguing.
- There are a lot of people (mostly men) and things (scroll down) described in relation to their relative depth.
- The high frequency of ‘standing behind’ compared with ‘Standing behind’ suggests that the relation between things doesn’t cross sentences. If we click on “standing” we go - once again - to the
Condordancetab to see examples of this. And whilst not the small number of examples (55) is not statistically significant, this gives us a way into the style of the cataloguer(s) and reminds us of the value of retaining capitalization.
- At a more trivial level, the absence of “his behind”, “your behind”, and “my behind” tells us that posteriors are not described by the cataloguer.
- We can also start to make inferences about the high
statvalues for words that have jumped up the list (“his”, “her”, “hillside”), as well as the use of proper names and locations, though to do this properly we need to know more about what the
statvalue means. As a rule, collocation statistics should be read with caution.
Reading stat values
Task 1: Taking the word “towards” as an example, what might the stat value signify?
- Note: to solve this problem, start by going to the
Collocatestab for the string “towards” (
1Rrespectively) and observe the stat column. Note that the values around 2 and below (this can even go into the negative!) are words like “a”, “View”, “an”; words that we know are common in the corpus. Note also that the higher stat values are for those words we’ve not really seen before (in the
Word Listtab “river”, “valley”, and “mountains” are 98th, 336th, and 387th respectively).
- The stat value signifies the unusually high or low occurrence of words near the target word, compared to the occurance of those words in the corpus as a whole. So, there are fewer occurrences of “a”
1L/1Rof “towards” than we would expect given the frequency of “a” in the corpus, and a greater number of occurances of “river” or “valley”
1L/1Rof “towards” than we would expect given the frequency of “them” and “just” in the corpus
- Note: by default, the
Statcolumn records a ‘Mutual Information’ score, which is a measure of the probability that the collocate and key word occur near to each other, relative to how many times they each occur in total.
Now we have a better sense of what
Stat is doing, change
Sort by to
Sort by Stat and hit
Start. Most of the top 150 or so ranked works are now those that occur only once or twice
1L/1R of “towards”, and that - as a result - have high stat scores. This isn’t very useful. To work more effectively with
Sort by Stat, change the
Min. Collocate Frequency field to “10” and hit
Start. We now have sensible results - “mountains” (in various forms, including errors) and “valley” pop towards the top of the list, with “river” a little further down, and by browsing the list we can continue to make inferences about both the language used in cataloguing and the subject of that cataloguing:
- Where verbs appeaar, they are in present tense form.
- Relative spatial arrangements of quite specialised topographical features are important features of the corpus.
- There are suggestions that the cataloguing used a relatively controlled vocabulary and phrasing: for example, if we click on the word “street” and
1Lit is dominated by variants of the phrase ‘view looking along a/the street’.
- Common locations (“Jhelum”, “Maidan”, “Bosphorus”, “Wellington”) appear to the left of “towards”, sandwiching it with more specific locations in phrases like “across the Jhelum towards the Shah Hamadan Masjid” or “along the Bosphorus towards Seraglio Point”.
From collocation to curatorial voice
Collocates tab enables you to create a statistical overview of a corpus. But small changes to the variables in the
Collocates tab can significantly change the statistics that are produced. The tool then needs to be used with caution.
Task 2: How regularised are the descriptions of clothing, accessories, and body adornments?
- Note: to solve this problem, start by searching in the
Caseunticked). You may need to adjust the other settings to capture the ways that words for clothing (e.g. “hat”) are used in proximity to the verb “to wear”.
- There is no one way of examining this problem. One approach is to edit your
4Rrespectively, chose the
Sort by Statoption, and set the
Min. Collocate Frequencyfield to “5”.
Start. Note that even at this low minimum collocate frequency, only generalised language is present: we see “hats”, “robes”, “turban” and “coat”, but no regular use of modifiers or specialised language. This indicates that general terminology rather than sartorial precision was important to the cataloguer.
- In terms of modifiers, whilst of low frequency, they are evaluative and positional: to whom is an item of clothing “ceremonial”, “traditional”, or “elaborate”?
- Note: this suggests a use case for corpus linguistics in the review of catalogue data, because tools like those in AntConc’s
concordancetab can indicate historically specific cataloguing choices that may have implications for contemporary user experience for catalogue data.
The collocates of a word are those words that tend to occur in proximity to that word more than they occur in proximity to all other words in the corpus