A continuous interaction approach tointeractive medical device design

Gerrit NiezenSwansea University

CONTINUOUS INTERACTION

I User exchanges input and output of dynamic informationwith a device over time

I Tight feedback loop: human-in-the-loopI Visual/haptic/audio feedback influences our actions and

changes our perceptionsI We control what we perceive

User DeviceActPerceive

DYNAMIC MODELS

I Underutilised in current HCI researchI Early HMI research during 1950s-1970s focused on

continuous interactionI Human pilot models developed in 1950s still used in

aerospace engineering

CHEVRON KEY INTERFACE

NUMBER ENTRY WITH CHEVRON KEYS

"big up" "small up"

NON-SYMMETRIC DEVICE BEHAVIOUR

"big up" "big down"

DISCUSSION

I Mimic real-world physics in the user interface, utilisinghuman perception of velocity etc.

I Build a human operator model to test user interfacealternatives in simulation

I Evaluating other types of physical input devices fornumber entry, e.g.:

I Dual concentric rotary encodersI Self-centring jog wheels