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Differences in User Responses to a Wizard of Oz versus Automated System

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Figure

Figure 1: Tutor text is shown on a screen and read aloudvia text-to-speech. The user responds verbally to the tu-tor’s queries.
Table 2: Number of questions for which at least one fea-ture from the feature set was found to differ with signif-icance p<.0 05 between WOZ and AUT responses andthe percentage the corpus represented by those questions,weighted by the speech turns they comprise.
Figure 4: The J48 tree for the question “Would you like todo another problem?”. Classification nodes are marked inblue and red for WOZ and AUT, respectively, and specify(#Instances:#Incorrect).
Figure 5: The J48 tree for the question “Now let’s find theforces exerted on the car in the vertical direction duringthe collision

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