Human factors aspects of pointing as an input technique in interactive computer systems

The use of pointing devices to input to interactive computer systems is increasing. This paper considers the human factors aspects of the use of a range of these devices. A distinction is drawn between direct and indirect devices. A number of aspects of pointing responses are discussed with reference to the experimental evidence: that pointing is non-linguistic, serial, involves gross motor movement and relies on visual feedback. The overall speed and the extent to which it is a natural form of response are also discussed. The paper ends with some conclusions about the suitability of different devices for different tasks.