Research Article
Estimating a User's Internal State before the First Input Utterance
Table 6
Elements of feature vectors.
| Speech-based feature | Face orientation feature | | | (a) | (b) | (c) | | | (a) | (b) | (c) |
| Length until input utterance | | ◯ | ◯ | ◯ | continuous () | | | ◯ | ◯ | Length of silence | | ◯ | ◯ | ◯ | | | | ◯ | ◯ | Length of filler | | ◯ | ◯ | ◯ | | | | ◯ | ◯ | Length of filled pause | | | | ◯ | discrete () | | ◯ | | |
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