1. Creating User Interfaces
General issues.
Classwork/homework: embedded computing project

2. Interlude Use of webcam (getUserMedia) Why do the mirror?
Why do the mirror?

3. Cognitive load What does the user need to know and/or remember?
Do--Operational skills ?
Area of active research

4. Memory Short term memory different from long term memory
experience
Functional MRI
Notion: 7 plus or minus 2 things…
Chunking
Process of connecting a fact (face, operation) with something else is what makes something long term memory.

5. Memory tricks Chunking (grouping)
Put new memories on a known, fixed, structure.
House
Map
Me: senators
Map of USA
categories

6. Mis-direction General concept
One particular type of mis-direction called the Stroop effect

7. Recognition vs Recall
Notion that users can more easily recognize something from a (short) list of options versus recalling.
Less error prone

8. Refrain on errors How to prevent? Being pro-active How to recover
Ways to present possibilities, for example, confirmation operation.
Some errors can be detected by the program, some not.
How to backup efficiently

9. Network effects Going from single application on one device to
Application with connections, required or optional with other applications
Example: use Facebook for login (authorization)
May lead to posting information
Example: backup, store, retrieve from iCloud, Google Drive, other
Applications present on multiple devices with some/considerable sharing
Example: Duolingo common status

10. Network effects
Expectations and training; We now are willing and expect to
enter password twice
get option to save password, other information
Click on highlighted
use dropdown menus
click on maps
Put parking receipt back in car
More?

11. Network effects [Even in these special purpose, embedded applications]
Option in ATM to send receipt using
Option to set up to always do this.
Option to set up first screen
Other?

12. Timing Real-time Database operations
Immediately, no perceived delay (latency)
Look up definitions!
Embedded applications often need to be real-time
Database operations
Need to prevent clashes while minimizing waits.
Avoid deadly embrace
Two or more threads each waiting for the other to complete a task

13. Paying parking, other: Now and future
Pay via
Recorded credit card, EFT, Paypay, bitcoin
Pay by touching phone
Pay NOT explicit
recorded automatically when car pulls in and leaves. Does this happen anywhere? ?

14. Voting machines Was move to optical scanner from lever machines good?
Positive features?
Negative features?
Why not online at site or not at site?

15. Internet of Things
Evolving set of protocols for connecting devices over Internet or other networks
See
Responsiveness, scalability, robustness, etc. extra requirements over [merely] connecting computers and other mobile devices

16. [More] Applications Military Medical Other
May assume users are trained!

17. Computer information system
Old definition, but still has value
CIS includes
Hardware
Software
People
Procedures

18. Documentation
1-pager
SUMMARY: what were you studying? What were the tasks (or some of the tasks)? Who were the subjects? What was the most important/surprising/anticipated findings?
PROOFREAD
Photograph(s) of interface, environment (if important)
Presentation: more details, but still “major on the majors”.
Details then analysis and summary

19. Analysis Consider & Talk about Usability definition(s) Cognitive load
Effectiveness, efficiency, satisfaction
Cognitive load
Networking effects
Error prevention and recovery
Timing
Interactions of people and [intended] procedure with hardware and software
More

20. Classwork
What are your plans? What is your approach?