4. Human Factors
▪ During World War II, a group of cognitive
psychologist were asked to improve the safety
of airplanes.
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5. Usability
▪ Putting ‘Users’ FIRST, usability is how easily a
human can use any product, operate it without
any hiccups
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6. User Experience (UX)
▪ Term was first coined by Donald(Don) Norman.
Apart from ease of use, enhancing effectiveness
and efficiency; UX adds satisfaction
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14. “With the passage of time,
the psychology of people
stays the same, but the
tools and objects in the
world change.
― Donald A. Norman
(Design of Everyday things)
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37. Cognition
▪ Attention
▪ Learning and Memory
▪ Perception
▪ Problem Solving, Reasoning and Decision
Making
▫ Users choose among different possibilities, build
strategies, take decisions and solve the problems with
help of their knowledge, previous experience and
common sense.
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38. LET’S REVIEW SOME CONCEPTS
Fitt’s Law
Gestalt’s Law
Hick’s Law
Miller’s Law
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Von Restorff effect
Serial Position effect
39. FITT’S LAW
“It is easier and faster to
hit larger target closer to
you than smaller target
further from you”
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43. GESTALT’S LAWS
Gestalt’s Law
Law of Similarity
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Gestalt’s Law
Law of Continuation
Gestalt’s Law
Law of Closure
Gestalt’s Law
Law of Proximity
44. GESTALT’S LAWS
Gestalt’s Law
Law of Similarity
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Gestalt’s Law
Law of Continuation
Gestalt’s Law
Law of Closure
Gestalt’s Law
Law of Proximity
Gestalt’s Law
Law of Figure and Ground
46. MILER’S LAW
“An average person can
hold 7 (+/- 2) numbers of
items in their working
memory”
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47. VON RESTORFF EFFECT
Predicts that when multiple
similar objects are present, the
one that differs from the rest is
most likely to be remembered!
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48. Serial Position Effect
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It is the propensity of a user to best remember the first and last items in a series.
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