Lecture 5 - Wearble Inputs

Question 1

Wearables have … due to their size

Answer 1

limited interaction capabilities

Question 2

Why is interaction limited on wearables?

Answer 2

As there is a small touchscreen or no touchscreen at all. There is also little space on the device for buttons, touch panels etc.

Question 3

What makes interaction with wearables especially difficult?

Answer 3

Mobility, when users move or do other activities wearables may not be stable for input

Question 4

What are the input modalities that we have explored in the lecture?

Answer 4

buttons
touchscreens
gestures
gloves
speech
device motion
wristband input

Question 5

Buttons and dials are …

Answer 5

physical controls

Question 6

What is good about buttons and dials?

Answer 6

they’re simple and eyes-free
they don’t demand visual attention
they have implicit haptic feedback

Question 7

What are the problems with buttons and dials?

Answer 7

How do we map functionality to the buttons ?
Not much functionality can be implemented
Hard to place on smaller form factors

Question 8

Touchscreens are …

Answer 8

a form of familiar input

Question 9

Why are touchscreens a good input modality?

Answer 9

• similar to phones
• users can directly manipulate content

Question 10

Why are touchscreens a bad modality?

Answer 10

• IO is coupled (can be bad)
• Occlusion
• Fat Finger Problem

^ last 2 are size related problems

Question 11

What are touch panels?

Answer 11

Touch panels are screenless touch panels that can be used to manipulate something.

Question 12

What is a good thing about touch panels?

Answer 12

they can be easily integrated into wearables

Question 13

What are the problems with touch panels?

Answer 13

• lack of coupled visual feedback (can’t see where we are touching in some form factors)
• how do users know where to press?

Question 14

What are the good things about hand gestures as input modalities for wearables?

Answer 14

• are eyes free
• are unrestrictive
• people are great at gestures and memorizing them
• easy to do and natural to do

Question 15

Hand gestures can be sensed via (has to be wearable)?

Answer 15

• gloves

Question 16

Limitations of using gloves?

Answer 16

• need to put it on and take if off
• potentially restrictive for everyday life

Question 17

Why are gloves a good way of getting hand gestures and finger motions?

Answer 17

• 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)

Question 18

What is the tradeoff when using gloves as a wearable?

Answer 18

subtlety vs input capability

Question 19

Why is speech a good input modality for wearables?

Answer 19

• language can be precise
• language can be expressive (many functions and potential interactions)
• visual attention free
• easy to perform

Question 20

What are the problems with speech?

Answer 20

• 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)

Question 21

What is a benefit of using device movement as an input modality?

Answer 21

-> moving a device to do something e.g. rotating a ring
- discreet
- easy
- eyes free
- unrestrictive

Question 22

What are the drawbacks of using device movement as an input modality?

Answer 22

• not that many functions possible
• hard to know what to do and whether interaction was successful

Question 23

What are the benefits of of wristband interaction?

Answer 23

-> Input sensing around the wrist

Avoids occlusion and fat finger problem
Larger physical space for input

Question 24

What are the drawbacks of of wristband interaction?

Answer 24

Hard to know what to do and potentially whether interaction was successful