5. 3 types of memory
• Sensorial
• Short Term Memory
• Long Term Memory
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WEB DESIGN NABA 2014 Roberto DADDA
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6. Sensorial
• Temporary buffer associated to senses
• No elaboration, raw data
• Does not require attention
• Short persistance:
• Vision less than 1 second
• Hearing 2 to 4 seconds
Relevant for interaction!!!
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WEB DESIGN NABA 2014 Roberto DADDA
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7. Short term memory STM (aka working memory)
• Limited capacity 7 to 9 units and short
duration, 20 to 30 seconds
• Repetion helps, requires attention.
• Used as a temporary buffer by
cognitive processing
• With new input you lose older ones
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WEB DESIGN NABA 2014 Roberto DADDA
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15. 7 words with a meaning
mamma leone elegante
mangiò transistor fiume
gatto
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WEB DESIGN NABA 2014 Roberto DADDA
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16. 15 letters and a meaning
La volpe elegante
mangiò il bisbetico
elefante
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17. STM
• Strong will to close tasks and free memory for the next one.
• Anxiety reduces capacity of STM
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18. STM and interaction design
• Avoid STM overcharge
• Minimize user usage of STM specially when he has to take critical
decisions
• AVOID STRESS!
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22. LTM
• Almost no limits
• Based on meaning and
associations
• Access made easy by:
• Access frequency
• Short time from last
access
• Numbers and types of
links
• Little interference by
other memory activities
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23. Ei fu siccome immobile…
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24. Ei fu. Siccome immobile,
dato il mortal sospiro,
stette la spoglia immemore
orba di tanto spiro,
così percossa, attonita
la terra al nunzio sta,
muta pensando all'ultima
ora dell'uom fatale;
né sa quando una simile
orma di piè mortale
la sua cruenta polvere
a calpestar verrà.
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35. Fitts’s law, simple version
• Time T to move your hand on a target of dimension S at distance D is
proportional to the D/S ratio
D
S
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36. Far targets must be big
Small target must be near
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37. Different, but not much, in different instruments
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