1. Intro to Human Processor Models
Dhvanil Patel • @dhvanilp
Very Brief

2. Option B is easier
to implement!
Ismein toh zyada
clicks hai!
But, this interaction
looks simpler!
Yeh interaction
kaise decide kiya?

3. Human Processor Models
≈
Simple solution for the problem
Perceptual
System
Cognitive
System
Motor
System
Senses Senses
Perceptual Processor Perceptual Processor
Motor Processor Motor ProcessorMovement Response Movement Response
Visual Image Storage Visual Image Storage
Working Memory Working MemoryLong Term Memory Long Term Memory
Auditory Image Storage Auditory Image Storage
Cognitive Processor Cognitive Processor

4. GOMS Model
Framework to think about cognitive effort.
Goals
Represents what the user wants to achieve, at
a higher cognitive level.
Operators
Sets of goal-operator sequences to accomplish
a sub-goal
Selection
Selection rules provide a mechanism to
decide among the methods in a particular
context of interaction
Methods
This is a way to structure a task from cognitive
point of view

5. KLM-GOMs
One of the easiest Human processor models
Assigns a time cost to
each interaction –
based on standarised
research.

6. Datepicker 1
KLM-GOMS in action!
MPK + MPK + MPK
Click on Month. Select July.
MPK + MPK + MPK
Click on Day. Select 11.
MPK + MP + R + MP
Click on Year. Scroll. Wait. Mouse Off.
MPK
Select 1980
= 21 seconds
Birthday July 12 2018
2016
2015
2019
2018 2018
2017

7. Datepicker 2
KLM-GOMS in action!
Birthday July 01 2018– –
MPK + MPK + MPK
Click on field. Type 11
MKK
Type 7
MKKKK
Type 1980
= 8.7 seconds

8. Payment Checkout
Email
Card
xyz@gmail.com
2443 - 2536 - 3244 - 3245
CVV 453Date 11 - 22
Pay Money
Pay Money
2443 - 2536 - 3244 - 3245 11 - 22
CVV 453
Use Saved Card 8824
= 32.9 seconds
= 6.2 seconds

9. Advanced Modelling
!
Tools like Cogulator, CogTool

10. No need of users
All you need is pen, paper, and internet. You
can quickly test this out on as many designs
as you’d like.
Difficult for Mobile UI
There aren’t well researched papers /
resources on modelling for Mobile UI
Super cheap
So that they get acquainted with code and
design as fast as possible.
Fails for highly cognitive tasks
When you have a lot of mental operators, this
method usually fails.
Doesn’t account for errors
GOMs methods assume that the user is super
efficient at the task.
Settles arguments
You will now have answers for questions like:
How is this better than this? How much time
will it take for this?

11. Image by Waymo

12. Playment: Training Data for AI

13. 1,000,000 tags annotated per day

14. Semantic Segmentation
Tools we’ve built this way

15. Point Cloud Annotation
Tools we’ve built this way

16. Thank you!
@dhvanilp