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Specificity
In T-LAB,
Specificity is the name of a process that
allows us to check which lexical units (words, lemmas or
categories) are typical or exclusive in a text or a corpus subset defined by some variables.
The "typical" lexical units, defined for over-using or
under-using, are detected by means of the chi-square test computation.
The "exclusive" lexical units are those present only
within the considered subset and "not" in others.
In this case, the chi-square test requires a
repeated crossing among two rows (text and corpus) and two columns
(presence and absence of each single word); so that the test has
only one degree of freedom and a threshold (5%) equal to the value
3.84.
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