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different system 0.003475878
tutoring system 0.00301594
overall system 0.002956436
full system 0.00295298
system policies 0.002883735
base system 0.002878115
system effectiveness 0.002843684
system 0.00260999
answer error 0.00228546
dialogue systems 0.002236376
word error 0.002071914
different error 0.0019784679999999997
answer analysis 0.00183512
tutorial dialogue 0.001788498
dialogue applications 0.00178709
dialogue sys 0.001778906
correct answer 0.001743732
other error 0.001702253
answer type 0.0016838880000000001
student answer 0.001671981
error type 0.001623588
error classification 0.0016101919999999999
ing error 0.001596872
incorrect error 0.0015922549999999999
particular error 0.001574697
error types 0.001552204
dialogue 0.00149858
important error 0.001497529
different approach 0.001475443
answer strategy 0.001470827
baseline error 0.001439428
incorrect word 0.001439009
error recovery 0.0014322809999999999
terms error 0.001426157
error frequency 0.001417761
relevant answer 0.001406732
irrelevant answer 0.001405563
program error 0.001383743
other errors 0.001363421
error rate 0.001344343
tation error 0.0013436169999999999
concept error 0.001337925
error rates 0.001334963
student language 0.001312733
different types 0.001305512
speech recognition 0.001281926
such errors 0.0012811979999999999
such systems 0.001245246
student learning 0.001210024
word sense 0.001198691
ing learning 0.001195215
unknown word 0.001190306
ambiguous word 0.001182392
different way 0.0011810409999999999
student answers 0.001179784
answer 0.00117288
incorrect answers 0.001160358
language input 0.0011564190000000001
tutoring systems 0.001143746
different policies 0.001139633
failure errors 0.001126721
different degree 0.00112269
interpretation errors 0.001121894
error 0.00111258
different phrasings 0.001100763
terms errors 0.001087325
natural language 0.001082669
restricted language 0.001041776
unrestricted language 0.001040552
type classification 0.00100862
user terminology 0.00100786
student utterances 0.001004739
user satisfaction 0.0010046830000000001
learning process 9.98003E-4
learning gain 9.9375E-4
average learning 9.91296E-4
detailed analysis 9.905320000000001E-4
alogue systems 9.71005E-4
rect answers 9.5862E-4
user interface 9.405590000000001E-4
creased learning 9.37559E-4
tential learning 9.334230000000001E-4
much information 9.258140000000001E-4
anticipated answers 9.232909999999999E-4
vague answers 9.2083E-4
prior analysis 9.12247E-4
graphical user 8.94701E-4
user satis 8.889E-4
several types 8.87402E-4
correct terms 8.844289999999999E-4
text similarity 8.698880000000001E-4
reasonable approach 8.60761E-4
type mean 8.482769999999999E-4
many students 8.461199999999999E-4
student responses 8.43358E-4
student input 8.41888E-4
tutorial feedback 8.36898E-4
incorrect interpretation 8.278210000000001E-4
incorrect terminology 8.20771E-4
