Speech
Considered as a modality, speech is very different from other modalities like written language or graphics.
The list below is just a brief list of some properties that are important to remember when designing dialogue. A comprehensive account of modality theory can be found in [Bernsen 2002, Bernsen 1999].
| Speech feature | Description | Opposes |
|---|---|---|
| Serial | No parallel information. | Graphics |
| Temporal | Speech takes time and puts demands on the users memory. | Graphics |
| Volatile | Disappears as fast as it is presented. | Graphics |
| Open | No finite set of symbols. | Keyboard |
| Referential | Speech (language) can refer to non-visible objects. | Graphics |