Presented at the MediCHI workshop at the ACM SIGCHI Conference on Human Factors in Computing Systems (CHI 2013) See the poster here: http://figshare.com/articles/A_continuous_interaction_approach_to_interactive_medical_device_design/1181850

1. A continuous interaction approach to
interactive medical device design
Gerrit Niezen
Swansea University

2. CONTINUOUS INTERACTION
I User exchanges input and output of dynamic information
with a device over time
I Tight feedback loop: human-in-the-loop
I Visual/haptic/audio feedback influences our actions and
changes our perceptions
I We control what we perceive
Act
User Device
Perceive

3. DYNAMIC MODELS
I Underutilised in current HCI research
I Early HMI research during 1950s-1970s focused on
continuous interaction
I Human pilot models developed in 1950s still used in
aerospace engineering

4. CHEVRON KEY INTERFACE

5. NUMBER ENTRY WITH CHEVRON KEYS
"big up" "small up"

6. NON-SYMMETRIC DEVICE BEHAVIOUR
"big up" "big down"

7. DISCUSSION
I Mimic real-world physics in the user interface, utilising
human perception of velocity etc.
I Build a human operator model to test user interface
alternatives in simulation
I Evaluating other types of physical input devices for
number entry, e.g.:
I Dual concentric rotary encoders
I Self-centring jog wheels