ITM 734
Introduction to Human Factors
in Information Systems
Norman: Chapters 1 - 3
Cindy Corritore
cindycc@gmail.com
This material has been developed by Georgia Tech HCI faculty, and continues to evolve.
1
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
ITM 734 (Corritore) 2
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Mapping ….
ITM 734 (Corritore) 3
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Mapping …. can
match what you want to
do to what’s apparently possible
- visible set of possible actions
ITM 734 (Corritore) 4
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Mapping example: just
want to print
ITM 734 (Corritore) 5
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Mapping example:
just want to print
ITM 734 (Corritore) 6
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Feedback …
ITM 734 (Corritore) 7
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Feedback …something
visible happens when
an action is taken
- show state of the system
ITM 734 (Corritore) 8
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Feedback example: cut
highlighted text in Word –
what happened to it?
- what is the novice solution?
ITM 734 (Corritore) 9
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Conceptual Model example -
Touchgraph
ITM 734 (Corritore) 10
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Affordances ….
ITM 734 (Corritore) 11
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Affordances ….
perceived and actual
properties of a thing
ITM 734 (Corritore) 12
Affordances
This interface
has become
second nature
for us
> Clicking while the
mouse cursor is on an
image on the screen
does something
particular
ITM 734 (Corritore) 13
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Visibility…
ITM 734 (Corritore) 14
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Visibility… make
relevant parts visible
ITM 734 (Corritore) 15
What are Normans big five
principles of design?
My Fat Cat Ate Veggies
Visibility… example
ITM 734 (Corritore) 16
A fun source ….
Web Pages that Suck -
http://www.webpagesth
atsuck.com/
ITM 734 (Corritore) 17
Other Norman say-isms
• What is paradox of technology?
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Other Norman say-isms
• What is paradox of technology?
complex
simple ITM 734 (Corritore) 19
Other Norman say-isms
• In Ch 2 Norman talks about what people
do
Falsely blame themselves for errors
Want to explain things (mental model) even
in face of poor model
Attribute own problems to environment, other
peoples’ problems to their personality
Learned helplessness – tried, failed, won’t try
again
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Other Norman say-isms
• Steps of Action
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Other Norman say-isms
• Steps of Action
Execution aspect:
vague goal > intention > plan > execution
Evaluation aspect:
perceive world > interpret > eval outcome >
reached goal
ITM 734 (Corritore) 22
Other Norman say-isms
• Imprecise knowledge > precise behavior –
how? (Ch 3)
• What is Memory in the world? What is its’
benefit?
ITM 734 (Corritore) 23
• Compare:
http://www.kartoo.com
to
http://www.touchgraph.com/TGGoogleBrow
ser.html
ITM 734 (Corritore) 24