Lecture 5 - Wearble Inputs Flashcards
Wearables have … due to their size
limited interaction capabilities
Why is interaction limited on wearables?
As there is a small touchscreen or no touchscreen at all. There is also little space on the device for buttons, touch panels etc.
What makes interaction with wearables especially difficult?
Mobility, when users move or do other activities wearables may not be stable for input
What are the input modalities that we have explored in the lecture?
buttons
touchscreens
gestures
gloves
speech
device motion
wristband input
Buttons and dials are …
physical controls
What is good about buttons and dials?
they’re simple and eyes-free
they don’t demand visual attention
they have implicit haptic feedback
What are the problems with buttons and dials?
How do we map functionality to the buttons ?
Not much functionality can be implemented
Hard to place on smaller form factors
Touchscreens are …
a form of familiar input
Why are touchscreens a good input modality?
- similar to phones
- users can directly manipulate content
Why are touchscreens a bad modality?
- IO is coupled (can be bad)
- Occlusion
- Fat Finger Problem
^ last 2 are size related problems
What are touch panels?
Touch panels are screenless touch panels that can be used to manipulate something.
What is a good thing about touch panels?
they can be easily integrated into wearables
What are the problems with touch panels?
- lack of coupled visual feedback (can’t see where we are touching in some form factors)
- how do users know where to press?
What are the good things about hand gestures as input modalities for wearables?
- are eyes free
- are unrestrictive
- people are great at gestures and memorizing them
- easy to do and natural to do
Hand gestures can be sensed via (has to be wearable)?
- gloves
Limitations of using gloves?
- need to put it on and take if off
- potentially restrictive for everyday life
Why are gloves a good way of getting hand gestures and finger motions?
- they will be quite accurate, as they’re literally a wrapper on our limbs
- there are many degrees of freedom (flex at each joint)
- there can be a large gresture vocab (think about how many signs can be made e.g. sign language)
What is the tradeoff when using gloves as a wearable?
subtlety vs input capability
Why is speech a good input modality for wearables?
- language can be precise
- language can be expressive (many functions and potential interactions)
- visual attention free
- easy to perform
What are the problems with speech?
- social acceptability (is it ok to talk to themselves)
- speech recognition (a lot of false positives and negatives)
- privacy (do we want to announce what we are doing with the device)
What is a benefit of using device movement as an input modality?
-> moving a device to do something e.g. rotating a ring
- discreet
- easy
- eyes free
- unrestrictive
What are the drawbacks of using device movement as an input modality?
- not that many functions possible
- hard to know what to do and whether interaction was successful
What are the benefits of of wristband interaction?
-> Input sensing around the wrist
Avoids occlusion and fat finger problem
Larger physical space for input
What are the drawbacks of of wristband interaction?
Hard to know what to do and potentially whether interaction was successful
