Factors affecting choice of speech over keyboard and mouse in a simple data-retrieval task

Alexander I. Rudnicky

Abstract: This paper describes some recent experiments that assess user mode selection behavior in a multi-modal environment in which actions can be performed with equivalent effect by speech, keyboard or scroller. Results indicate that users freely choose speech over other modalities, even when it is less efficient in objective terms, such as time-to-completion or input error. Additional evidence indicates that users appear to focus on simple input time in making their choice of mode, in effect minimizing the amount of personal effort expended.