Table 2.

Detailed results by test set, “most specific” term length and expert.

	Linguistic Approach	Current Approach (linguistic and statistical filters applied)
Term length (number of content words)	RECALL method: all NPs, VPs	RECALL method: frequency = 0	RECALL method: frequency = 2	RECALL method: frequency = 3	RECALL method: frequency = 5	RECALL method: frequency = 7
RESULTS: EXPERT 1
1	100%	100%	67%	52%	52%	not extracted
2	99%	99%	95%	92%	81%	not extracted
3	97%	97%	96%	94%	89%	not extracted
4	91%	90%	88%	87%	87%	not extracted
5	85%	85%	82%	82%	60%	not extracted
> 5	63%	not extracted	not extracted	not extracted	not extracted	not extracted
RESULTS: EXPERT 2
1	86%	86%	78%	70%	62%	not extracted
2	92%	91%	90%	85%	71%	not extracted
3	91%	91%	87%	85%	78%	not extracted
4	86%	82%	82%	81%	81%	not extracted
5	78%	72%	72%	72%	72%	not extracted
> 5	71%	not extracted	not extracted	not extracted	not extracted	not extracted
RESULTS: EXPERT 3
1	94%	94%	85%	80%	71%	69%
2	87%	86%	84%	82%	76%	72%
3	80%	85%	83%	83%	82%	81%
4	72%	71%	68%	68%	68%	68%
5	58%	59%	59%	58%	58%	58%
> 5	63%	not extracted	not extracted	not extracted	not extracted	not extracted