swe-readability-sparv-ovix

OVIX (ordvariationsindex) is a readability measure based on how many words occur only once in the text chunk.

OVIX is calculated as log(tokens) / log(2 - (log(types) / log(tokens)))

A high value can be interpreted as frequently introducing new words to the reader. On the other hand, a low value may indicate a monotonous text.

This analysis is used with Sparv. Check out Sparv's quick start guide to get started!

To use this analysis, add the following line under export.annotations in the Sparv corpus configuration file:

- <text>:readability.ovix  # OVIX values for text chunks

For more info on how to use Sparv, check out the Sparv documentation.

Example output:

<text ovix="inf">
  <token>Det</token>
  <token>här</token>
  <token>är</token>
  <token>en</token>
  <token>enkel</token>
  <token>mening</token>
  <token>.</token>
</text>
<text ovix="94.13">
  <token>LIX</token>
  <token>(</token>
  <token>Björnsson</token>
  <token>,</token>
  <token>1968</token>
  <token>)</token>
  <token>är</token>
  <token>ett</token>
  <token>läsbarhetsvärde</token>
  <token>beräknat</token>
  <token>på</token>
  <token>genomsnittligt</token>
  <token>antal</token>
  <token>ord</token>
  <token>per</token>
  <token>mening</token>
  <token>och</token>
  <token>andel</token>
  <token>långa</token>
  <token>ord</token>
  <token>(</token>
  <token>över</token>
  <token>sex</token>
  <token>bokstäver</token>
  <token>långa</token>
  <token>)</token>
  <token>.</token>
</text>