Table 2.

Descriptive statistics for each of the data sets.

Data set	N concepts	N features	Average N concepts per feature	Average N features per concept	Density of representation (% feats/concept)
Rogers et al. visual	52	194	3.89	14.50	7.5
Garrard et al. sensory	52	206	3.00	11.87	5.8
Garrard et al. functional	52	144	2.27	6.29	4.4
Garrard et al. encyclopedic	47	79	2.23	3.74	4.7
Cree and McRae perceptual	52	208	2.09	8.35	4.0
Cree and McRae functional	38	87	1.32	3.03	3.5
Cree and McRae encyclopedic	47	112	1.39	3.21	3.0
Cree and McRae edited perceptual	52	214	4.22	17.37	8.1
Cree and McRae edited functional	52	81	2.68	4.17	5.2
Cree and McRae edited encyclopedic	52	115	2.86	6.33	5.5