Motor

Question 1

What are the different types of motor functions?

Answer 1

1. Voluntary Movement
2. Motor Program
3. Reflex
4. Automatic Movement (heartbeat, internal organs)

Question 2

What is Fitt’s law?

Answer 2

It predicts the time required to rapidly move to a target area is a function of the ratio between the distance to the target and width of the target.

Small target takes more time. Big target takes less time.

Relevance :

1. Make your targets big.
2. Make your movements short.
3. Estimate how long things will take.

Question 3

What is the screen target that can be seen when touched?

Answer 3

45-57 pixels.

Avg. width of index finger is 1.6 to 2cm.

Question 4

What is the minimum reliable touch target?

Answer 4

Minimum - 6 mm

If moving or distracted - minimum 8 mm

Question 5

UT only tells us what works and what doesn’t. To improve a design we need to rely on ____________________

Answer 5

UX design principles and innovation

Question 6

What is the relevance of Biometrics and Kinesiology?

Answer 6

1. Thing of the physical load you will put on your user.
2. Anything that the user does repeatedly for a long time will cause damage. Ensure diverse set of movement in the jobs you design.

Question 7

How do users interact with a device?

Answer 7

• Thumbs are used for 75% of all phone interactions.

* For larger devices people are more likely to use two hands. The thumb is still used for most of the interaction.

Question 8

What is the relevance of anthropometry?

Answer 8

1. Design for diverse user sizes - 5th to 95th percentile.

2. Ensure your measurements reflect the realities of how people actually position themselves.