The small difference in average ratings for the HS list and the KW list can be explained, at least in part, by two factors: 1) Differences among professionals and students in inter-subject agreement and reliability; 2) A discrepancy in the rating of single word terms across term types.
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; .