Threshold: So that no bias would be unintentionally introduced, we presented subjects with all terms output by each method, up to a specified cut-off poin-However, using lists of equal length for each method would have necessitated either omitting HSs and KWs or changing the definition of TTs.
we made the following decisions: • For TTs, we included all identified terms; • For HSs, we included all terms whose head occurred more than once in the document; .