User

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User characteristics

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User

  1. 1. Mater of Arts in Communication Design WEB DESIGN User
  2. 2. User WEB DESIGN NABA 2014 Roberto DADDA 2
  3. 3. User WEB DESIGN NABA 2014 Roberto DADDA 3
  4. 4. Brain model User WEB DESIGN NABA 2014 Roberto DADDA 4
  5. 5. 3 types of memory • Sensorial • Short Term Memory • Long Term Memory User WEB DESIGN NABA 2014 Roberto DADDA 5
  6. 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!!! User WEB DESIGN NABA 2014 Roberto DADDA 6
  7. 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 User WEB DESIGN NABA 2014 Roberto DADDA 7
  8. 8. Peterson and Peterson (1954) User WEB DESIGN NABA 2014 Roberto DADDA 8
  9. 9. 7 letters jglmnrt User WEB DESIGN NABA 2014 Roberto DADDA 9
  10. 10. And now count… • … from 15 to 1 back 3 by 3 • Rember the letters? User WEB DESIGN NABA 2014 Roberto DADDA 10
  11. 11. 15 letters jglmnrtebcaioeq User WEB DESIGN NABA 2014 Roberto DADDA 11
  12. 12. Difficult even not counting! User WEB DESIGN NABA 2014 Roberto DADDA 12
  13. 13. 15 letters and a meaning williammcmillan User WEB DESIGN NABA 2014 Roberto DADDA 13
  14. 14. Easy? User WEB DESIGN NABA 2014 Roberto DADDA 14
  15. 15. 7 words with a meaning mamma leone elegante mangiò transistor fiume gatto User WEB DESIGN NABA 2014 Roberto DADDA 15
  16. 16. 15 letters and a meaning La volpe elegante mangiò il bisbetico elefante User WEB DESIGN NABA 2014 Roberto DADDA 16
  17. 17. STM • Strong will to close tasks and free memory for the next one. • Anxiety reduces capacity of STM User WEB DESIGN NABA 2014 Roberto DADDA 17
  18. 18. STM and interaction design • Avoid STM overcharge • Minimize user usage of STM specially when he has to take critical decisions • AVOID STRESS! User WEB DESIGN NABA 2014 Roberto DADDA 18
  19. 19. Fail! Microsoft Word 97 User WEB DESIGN NABA 2014 Roberto DADDA 19
  20. 20. If something can be done by computer make it do! User WEB DESIGN NABA 2014 Roberto DADDA 20
  21. 21. Long term memory LTM User WEB DESIGN NABA 2014 Roberto DADDA 21
  22. 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 User WEB DESIGN NABA 2014 Roberto DADDA 22
  23. 23. Ei fu siccome immobile… User WEB DESIGN NABA 2014 Roberto DADDA 23
  24. 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. User WEB DESIGN NABA 2014 Roberto DADDA 24
  25. 25. User WEB DESIGN NABA 2014 Roberto DADDA 25
  26. 26. User WEB DESIGN NABA 2014 Roberto DADDA 26
  27. 27. User WEB DESIGN NABA 2014 Roberto DADDA 27
  28. 28. THE ATKINSON-SHIFFRIN MODEL User WEB DESIGN NABA 2014 Roberto DADDA 28
  29. 29. Some practical influences on design User WEB DESIGN NABA 2014 Roberto DADDA 29
  30. 30. Standardized element position User WEB DESIGN NABA 2014 Roberto DADDA 30
  31. 31. User WEB DESIGN NABA 2014 Roberto DADDA 31
  32. 32. Visual feedback User WEB DESIGN NABA 2014 Roberto DADDA 32
  33. 33. User WEB DESIGN NABA 2014 Roberto DADDA 33
  34. 34. User WEB DESIGN NABA 2014 Roberto DADDA 34
  35. 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 User WEB DESIGN NABA 2014 Roberto DADDA 35
  36. 36. Far targets must be big Small target must be near User WEB DESIGN NABA 2014 Roberto DADDA 36
  37. 37. Different, but not much, in different instruments User WEB DESIGN NABA 2014 Roberto DADDA 37
  38. 38. Far from where? User WEB DESIGN NABA 2014 Roberto DADDA 38
  39. 39. Tactile Feedback User WEB DESIGN NABA 2014 Roberto DADDA 39
  40. 40. Errors rate No feedback Qualitative feedback Quantitave feedback Number of tries User WEB DESIGN NABA 2014 Roberto DADDA 40
  41. 41. User WEB DESIGN NABA 2014 Roberto DADDA 41
  42. 42. Rule of thumb User WEB DESIGN NABA 2014 Roberto DADDA 42
  43. 43. Drop-down User WEB DESIGN NABA 2014 Roberto DADDA 43
  44. 44. Pop-up Pull-down User WEB DESIGN NABA 2014 Roberto DADDA 44
  45. 45. Pie User WEB DESIGN NABA 2014 Roberto DADDA 45
  46. 46. Roberto Dadda www.dadda.it roberto@dadda.it +39 338 775 22 03 Twitter, facebook, linkedin: robertodadda User WEB DESIGN NABA 2014 Roberto DADDA 46

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