Vocabulary

This T-LAB tool allows us to check the Vocabulary of the corpus and its subsets.
Moreover some measures of lexical richness are provided.

The Vocabulary table is a list including all distinct words (i.e. word types), the frequency of their occurrences (i.e. word tokens), their corresponding lemma (or label) and some categories used by T-LAB (see Glossary/Lemmatization).

The user can select (see the following image) the lexical units which belong to each category, view the corresponding table and save it as a .xls file.

The measures of lexical richness are five:

Type/Token ratio (i.e. TTR);
Root TTR (Guiraud, 1960), obtained by dividing the number of types by the square root of the number of the tokens;
Corrected TTR (Carroll, 1964), obtained by dividing the number of types by the square root of twice the number of the tokens;
Log TTR (Herdan, 1960), obtained by dividing the logarithm of the number of types by the logarithm of the the number of the tokens;
Hapax/Types ratio.

N.B.:
- Hapax (i.e. Hapax Legomena) are words which occur only once in a corpus;
- When analysing a corpus subset, all measures of lexical richness do not include stop words (e.g. articles and prepositions).