Gdc2013 macton usability_is_not_random
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Transcript of Gdc2013 macton usability_is_not_random
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Where do we apply usability lessons?
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Where do we apply usability lessons?
Tools UIGameAPI design….everywhere!
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Today’s goal
Mental model for recognizing and breaking down usability issues
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Today’s goal
Mental model for recognizing and breaking down usability issues
Not even going to scratch the tip of the iceberg
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Today’s goal
Mental model for recognizing and breaking down usability issues
Not even going to scratch the tip of the iceberg
Not a numbers talk
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TL;DL
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TL;DL The only way is to watch it live
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TL;DL The only way is to watch it live Choice is bad
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TL;DL The only way is to watch it live Choice is bad Choice is good
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TL;DL The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need
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TL;DL The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad
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TL;DL The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good
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TL;DL The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations
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TL;DL The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations When in doubt, be like Maya
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Working definition: Usability
Total time required to solve the specified problem at the desired level of quality.
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Let’s get this out of the way…
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Let’s get this out of the way…
What tools do you use to measure?
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Let’s get this out of the way…
What tools do you use to measure?The only way is to
watch it live
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Let’s get this out of the way…
What tools do you use to measure?The only way is to
watch it liveTo make things more usable, asking good
questions is way more valuable than better tools.
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What is usability a function of?Context Information
densityMessage creation
Message translation
Message response
Let’s understand each of these elements by example…
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Example 1: Search
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Context is all agreed upon information.
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Context is all agreed upon information.
What problem are we trying to solve?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Do we agree on what we’re trying to accomplish?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Do we agree on what we’re trying to accomplish?
Magic words? Music video? Etymology?Magic store?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
What’s the impact of such a broad context?
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Must visually parse the results…
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Must guess at possible answer and click link…
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Must visually scan page for answer…
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Scroll…
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Scroll more…
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Keep scrolling…
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Eventually… if we’re paying attention, get answer.
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If not… start over with another link
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Improving, but…
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
What if we had more context?
i.e. more agreed upon information
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e.g. “computational knowledge”
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…or files in a file system
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…or models in an asset tree
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…or google-fu
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...agree on more context in advance
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
What if we had less context?
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e.g. generic text entry box
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e.g. generic text entry box
Less context = fewer constraints?
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e.g. generic text entry box
Less context = fewer constraints?
How many characters?
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e.g. generic text entry box
Less context = fewer constraints?
How many characters?
What kind of characters?
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e.g. generic text entry box
Less context = fewer constraints?
How many characters?
What kind of characters?
What do we know about the problem?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The upper limit of usability is determined by the amount of agreed upon information we start with.
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This is more usable…
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…than this…
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…but only if we agree beforehand that we’re searching for “computational knowledge”
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The upper limit of usability is determined by the amount of agreed upon information we start with.
![Page 55: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/55.jpg)
Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The upper limit of usability is determined by the amount of agreed upon information we start with.
i.e. More constraints = More (potentially) usable
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The upper limit of usability is determined by the amount of agreed upon information we start with.
i.e. More constraints = More (potentially) usable
Choice is Bad
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The upper limit of usability is determined by the amount of agreed upon information we start with.
i.e. More constraints = More (potentially) usable
Choice is BadTo make things more usable, solve more
specific, not more generic, problem.
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Choice is Bad
How do you measure it?How do you know when to stop?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Hunt (What we’ve seen so far…)
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Hunt
(Know what the end result is…)
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Hunt
Play
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Hunt
Play “I don’t know what I’m looking for, but I’ll know it when I see it.”
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(Play)i.e. Iteration, Inspiration, Creative, …
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In other words, (hunt vs. play)….
A Bxform
The only purpose of any program is to transform some data from one form (A) into another form (B)
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In other words, (hunt vs. play)….
A Bhunt
When you know what (B) is
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In other words, (hunt vs. play)….
A ?play
When you don’t
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(Play)Many choices, quickly…
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(Play)Recommend more choices,
quickly…
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In other words, (hunt vs. play)….
A ?play
When you don’t know what you want…
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In other words, (hunt vs. play)….
A ?play
When you don’t know what you want…
Choice is Good
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In other words, (hunt vs. play)….
A ?play
When you don’t know what you want…
Choice is GoodTo make things more usable, present lots of relevant, comparable options quickly.
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Choice is Good
How do you measure it?How do you know what to show?
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Hunt
PlayVery different problems. Very different solutions.
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Amount of the problem that can be solved with any particular message.
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Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
Amount of the problem that can be solved with any particular message.
Message = data associated with each step of a process
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Start search
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Start search
Visually parse the results…
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Start search
Visually parse the results…
Guess at possible answer and click link…
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Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
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Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
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Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
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Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
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Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text
![Page 87: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/87.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
![Page 88: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/88.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click
![Page 89: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/89.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
![Page 90: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/90.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click
![Page 91: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/91.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
![Page 92: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/92.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
![Page 93: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/93.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down
![Page 94: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/94.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down More page result
![Page 95: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/95.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down More page result
![Page 96: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/96.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down More page result
Back button
![Page 97: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/97.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down More page result
Back button List of possibilities
![Page 98: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/98.jpg)
Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The amount that each message reduces the search space
![Page 99: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/99.jpg)
Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
The amount that each message reduces the search space
Every problem is like a game of 20 Questions.
![Page 100: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/100.jpg)
Example 1: SearchContext Information
densityMessage creation
Message translation
Message response
a b r a c a d a b r a
This message is made up of smaller messages…
![Page 101: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/101.jpg)
a b r a c a d a b r a
What does the first message tell us?
![Page 102: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/102.jpg)
a b r a c a d a b r a
What does the first message tell us?‘a’ is U+0061, which is in the ‘Basic Latin’ Unicode block
![Page 103: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/103.jpg)
a b r a c a d a b r a
What does the first message tell us?‘a’ is U+0061, which is in the ‘Basic Latin’ Unicode blockWhich means we’re likely searching in EFIGS
![Page 104: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/104.jpg)
a b r a c a d a b r a
What does the first message tell us?‘a’ is U+0061, which is in the ‘Basic Latin’ Unicode blockWhich means we’re likely searching in EFIGSBased on context: Most likely in English
![Page 105: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/105.jpg)
a b r a c a d a b r a
What does the first message tell us?‘a’ is U+0061, which is in the ‘Basic Latin’ Unicode blockWhich means we’re likely searching in EFIGSBased on context: Most likely in English
In dictionary of ~110,000 common English words, there are only ~6,500 words that begin with ‘a’.
![Page 106: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/106.jpg)
a b r a c a d a b r a
What does the first message tell us?‘a’ is U+0061, which is in the ‘Basic Latin’ Unicode blockWhich means we’re likely searching in EFIGSBased on context: Most likely in English
In dictionary of ~110,000 common English words, there are only ~6,500 words that begin with ‘a’.
Reduced likely results from near-infinite to ~6,500
![Page 107: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/107.jpg)
a b r a c a d a b r a
…and together ‘a’ + ‘b’ reduces our search space to ~420 words in the same dictionary.
![Page 108: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/108.jpg)
a b r a c a d a b r a
…and together ‘a’ + ‘b’ reduces our search space to ~420 words in the same dictionary.
We can start to make reasonable guesses…
(Obviously Google’s search space is much bigger than a sample dictionary.)
![Page 109: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/109.jpg)
a b r a c a d a b r a
By the 5th message, the most likely answer is the correct one…
![Page 110: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/110.jpg)
a b r a c a d a b r a
A lot Almost none
If context is well-defined, information density should map like this…
(Like a game of 20 Questions)
![Page 111: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/111.jpg)
http://en.wikipedia.org/wiki/File:Gamma_distribution_pdf.svg
Not every well-formed case looks like this…
![Page 112: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/112.jpg)
http://en.wikipedia.org/wiki/File:Gamma_distribution_pdf.svg
…but it should be in this family of distributions
![Page 113: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/113.jpg)
If we look back at our search messages…
![Page 114: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/114.jpg)
Start search
Visually parse the results…
Guess at possible answer and click link…
Scan page for answer…
Scroll…
Found result?
No
Search text List of possibilities
Mouse scroll, page click List more possibilities
Link click Page result
Mouse scroll,Page down More page result
Back button List of possibilities
![Page 115: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/115.jpg)
What would that information density look like?
![Page 116: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/116.jpg)
If your information density looks like this…
or
![Page 117: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/117.jpg)
If your information density looks like this…
or
Your context probably isn’t well-defined.
![Page 118: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/118.jpg)
If your information density looks like this…
or
Your context probably isn’t well-defined.
20 Questions is all you ever need
To make things more usable, map context so that most likely stuff comes first
![Page 119: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/119.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Amount of time required to act correctly
![Page 120: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/120.jpg)
What’s wrong with this?
Need to do calculations in your head
![Page 121: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/121.jpg)
What’s wrong with this?
Need to do calculations in your head
![Page 122: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/122.jpg)
What’s wrong with this?
Need to do calculations in your head
Need to choose between a lot of unknown options
![Page 123: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/123.jpg)
What’s wrong with this?
Need to do calculations in your head
Need to choose between a lot of unknown options
Options too granular
![Page 124: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/124.jpg)
What’s wrong with this?
Need to do calculations in your head
Need to choose between a lot of unknown options
Options too granular
Lots of unused, not useful options
![Page 125: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/125.jpg)
What’s wrong with this?
Need to do calculations in your head
Need to choose between a lot of unknown options
Options too granular
Lots of unused, not useful options
Even more unused, not useful options
![Page 126: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/126.jpg)
What’s wrong with this?
Need to do calculations in your head
Need to choose between a lot of unknown options
Options too granular
Lots of unused, not useful options
Even more unused, not useful options
Unclear how to choose the right answer
![Page 127: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/127.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
![Page 128: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/128.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
Parsing time
![Page 129: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/129.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
Parsing time Thinking time
![Page 130: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/130.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
Parsing time Thinking time
Working on wrong problem
![Page 131: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/131.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
Parsing time Thinking time
Working on wrong problem Error rate
![Page 132: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/132.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
Things to Measure
Parsing time Thinking time
Working on wrong problem Error rate
Learning curve is bad
To make things more usable, reduce the time needed to work out what the right
thing to do is
![Page 133: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/133.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
However… message creation time improves over time.
![Page 134: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/134.jpg)
Initial difficulty isn’t always bad...
e.g. Driving
![Page 135: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/135.jpg)
e.g. vi(m)
![Page 136: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/136.jpg)
e.g. maya
![Page 137: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/137.jpg)
e.g. making games
![Page 138: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/138.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
However… message creation time improves over time.Learning curve is good
![Page 139: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/139.jpg)
Example 2: Screenshot DialogContext Information
densityMessage creation
Message translation
Message response
However… message creation time improves over time.Learning curve is good
To make things more usable, allow for some features that are only useful with
lots of practice.
![Page 140: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/140.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
![Page 141: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/141.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”…
![Page 142: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/142.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
![Page 143: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/143.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels
![Page 144: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/144.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels e.g. Building lightmaps
![Page 145: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/145.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels e.g. Building lightmaps
e.g. Compile, link, reload
![Page 146: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/146.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels e.g. Building lightmaps
“5 second rule”e.g. Compile, link, reload
![Page 147: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/147.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels e.g. Building lightmaps
“5 second rule”e.g. Compile, link, reload
One minute is worth 12 iterations
![Page 148: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/148.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Latency to transform message to useful result.
When people say “iteration”… Easiest to measure
e.g. Building levels e.g. Building lightmaps
“5 second rule”e.g. Compile, link, reload
One minute is worth 12 iterations
To make things more usable, reduce the time needed to work out what the right
thing to do is
![Page 149: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/149.jpg)
Example 3: Build timesContext Information
densityMessage creation
Message translation
Message response
Throughput of message. i.e. time until can begin next message
![Page 150: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/150.jpg)
Example 4: Stamp mode
![Page 151: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/151.jpg)
E.g. 3D manipulators have very little context.
(“Move/rotate/scale some object”)
![Page 152: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/152.jpg)
Redefine context:
“building things made up of connected, modular parts”
![Page 153: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/153.jpg)
Hotkey: Modular stamp mode
![Page 154: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/154.jpg)
Hotkey: Modular stamp mode
See ghosted set of connectable pieces
![Page 155: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/155.jpg)
Tab another set of connectable pieces
![Page 156: Gdc2013 macton usability_is_not_random](https://reader031.fdocuments.in/reader031/viewer/2022030310/58f9c0f91a28ab6c398b45b7/html5/thumbnails/156.jpg)
Click on ghosted piece to “stamp”
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Tab back to other set
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Example 4: Stamp mode
What happened?
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Example 4: Stamp mode
What happened? More specific context
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Example 4: Stamp mode
What happened? More specific context Better information density
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Example 4: Stamp mode
What happened? More specific context Better information density Fast and simple message creation
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Example 4: Stamp mode
What happened? More specific context Better information density Fast and simple message creation Immediate message translation and response
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Example 4: Stamp mode
What happened? More specific context Better information density Fast and simple message creation Immediate message translation and response Forgot: Muscle memory
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Example 4: Stamp mode
What happened? More specific context Better information density Fast and simple message creation Immediate message translation and response Forgot: Muscle memory
When in doubt, be like Maya
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Example 4: Stamp mode
What happened? More specific context Better information density Fast and simple message creation Immediate message translation and response Forgot: Muscle memory
When in doubt, be like Maya
The more different something is, the bigger the bridge to the old way needs to
be.
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Review
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Review The only way is to watch it live
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Review The only way is to watch it live Choice is bad
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Review The only way is to watch it live Choice is bad Choice is good
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations When in doubt, be like Maya
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations When in doubt, be like Maya
Usability is triage
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Review The only way is to watch it live Choice is bad Choice is good 20 Questions is all you ever need Learning curve is bad Learning curve is good One minute is worth 12 iterations When in doubt, be like Maya
Usability is triageTo make things more usable, don’t try to
maximize usability in everything
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#README
“A mathematical theory of communication” -- Claude Shannon
“The Design of Everyday Things” -- Donald A. Norman
“The Man Who Lied to His Laptop: What We Can Learn About Ourselves from Our Machines”
-- Clifford Nass and Corina Yen