THE INTEGRATION OF SPEECH AND CAMERA CONTROL IN MESSAGE TRANSFER TV CONFERENCING

In this study, we examined participants' integration of speech and cam era control during message-transfer television conferencing. We observ ed participants' free use of speech and camera-control modality when t hey transmitted 3 types of objects-formed text (FT), mathematical expr ession (ME), and electronic circuit (EC)-each ranging in size from 1 t o 7 elements. Modality use was classified into main-modality use and a uxiliary-modality use. Five integration models were proposed based on main-auxiliary combinations. Results indicated that (a) speech was use d more frequently for transmitting ME objects, and camera control was used more often for FT and EC objects; (b) speech was gradually replac ed by camera control as size increased; (c) when camera control was ch osen as main modality, speech was usually also used, as auxiliary moda lity; and (d) compared to beginners, experienced participants used mor e speech. A postsession questionnaire was conducted to collect partici pants' assessment of the correctness, speed, and ease of use of speech and camera control. Camera control had a higher score in total, but s peech was thought faster for transmitting FT and ME objects.