MIT Press

Table 2

Confusion matrix for preposition errors used in the artificial errors method. Based on the training data from the FCE corpus. The left column shows the correct preposition. Each row shows the author's preposition choices for that label and Prob(source|label). The numbers next to the targets show the count of the label (or source) in the data set. The table is based on the confusion matrix for 12 prepositions but only rows corresponding to eight most frequent prepositions are shown to make the table readable.

Label	Sources
	on	for	of	to	at	in	with	by
	(1,897)	(3,995)	(5,945)	(3,897)	(2,726)	(6,367)	(2,011)	(625)
on (1,829)	0.852	0.020	0.014	0.008	0.012	0.076	0.008	0.002
for (4,034)	0.002	0.939	0.019	0.018	0.001	0.007	0.001	0.001
of (5,795)	0.002	0.004	0.974	0.001	0.001	0.009	0.002	0.001
to (3,990)	0.004	0.015	0.010	0.936	0.007	0.018	0.008	-
at (2,898)	0.011	0.002	0.007	0.009	0.889	0.076	0.002	0.001
in (6,274)	0.040	0.003	0.011	0.003	0.013	0.924	0.002	0.001
with (2,046)	0.002	0.008	0.009	0.009	0.002	0.015	0.933	0.009
by (621)	0.008	0.010	0.011	-	0.002	0.008	0.008	0.934

Label	Sources
	on	for	of	to	at	in	with	by
	(1,897)	(3,995)	(5,945)	(3,897)	(2,726)	(6,367)	(2,011)	(625)
on (1,829)	0.852	0.020	0.014	0.008	0.012	0.076	0.008	0.002
for (4,034)	0.002	0.939	0.019	0.018	0.001	0.007	0.001	0.001
of (5,795)	0.002	0.004	0.974	0.001	0.001	0.009	0.002	0.001
to (3,990)	0.004	0.015	0.010	0.936	0.007	0.018	0.008	-
at (2,898)	0.011	0.002	0.007	0.009	0.889	0.076	0.002	0.001
in (6,274)	0.040	0.003	0.011	0.003	0.013	0.924	0.002	0.001
with (2,046)	0.002	0.008	0.009	0.009	0.002	0.015	0.933	0.009
by (621)	0.008	0.010	0.011	-	0.002	0.008	0.008	0.934

View Large

This Feature Is Available To Subscribers Only