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Physicality 3

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Slides for the Information Visualisation unit of my 2013 online course on HCI – part 3
https://hcibook.com/hcicourse/2013/unit/10-physicality

* study the old to design the new – exposing the latent lessons in well-designed products
* understanding the multiple feedback loops in digital devices with physical form
* model physical device states of the device ‘unplugged' using physigrams

Veröffentlicht in: Design
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Physicality 3

  1. 1. designing for physicality everyday devices to physigrams Alan Dix www.alandix.com www.physicality.org/TouchIT/
  2. 2. levels of fidelity in design from paper prototype to working mock-up
  3. 3. study the old to design the new • look at ordinary consumer devices – washing machine, light switch, personal stereo • why? – we are used to using them ourselves – they have been ‘tested’ by the marketplace – they embody the experience of designers
  4. 4. half empty? other places … – Norman – DOET/POET – Thimbleby – FSM for video, microwave often used as HCI strawman – emphasise for design flaws we are looking for the good lessons – how mundane devices exploit physicality
  5. 5. multiple feedback loops physical–logical mappings physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers (ii) physical effects (iii) virtual effects show message, turn light on motors, effectors (a) physical manipulation (i) sensed inputs logical system A B C (c) felt feedback (d)‘electronic’ feedback (b) perceived state see message on screen resistance, ? physical sounds ? turn knob, press button effects on logical objects device physical environment D (iv) physical effects controlling external things (e) physical feedback notice light is on, kettle boils semantic feedback
  6. 6. multiple feedback loops physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers A (c) felt feedback (b) perceived state (a) physical manipulation turn knob, press button device
  7. 7. multiple feedback loops physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers logical system A (ii) physical effects motors, effectors (i) sensed inputs B (c) felt feedback physical–logical mappings (b) perceived state (a) physical manipulation turn knob, press button device
  8. 8. multiple feedback loops physical–logical mappings physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers (ii) physical effects motors, effectors (a) physical manipulation (i) sensed inputs logical system A B (iii) virtual effects show message, turn light on C (c) felt feedback (b) perceived state (d)‘electronic’ feedback see message on screen resistance, ? physical sounds ? turn knob, press button device
  9. 9. multiple feedback loops physical–logical mappings physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers (ii) physical effects (iii) virtual effects show message, turn light on motors, effectors (a) physical manipulation (i) sensed inputs logical system A B C (c) felt feedback (d)‘electronic’ feedback (b) perceived state see message on screen resistance, ? physical sounds ? turn knob, press button effects on logical objects device physical environment D (iv) physical effects controlling external things (e) physical feedback notice light is on, kettle boils
  10. 10. multiple feedback loops the GUI fallacy … semantic feedback is NOT enough physical–logical mappings physical aspects virtual aspects screens, lights, buzzers, speakers (ii) physical effects (iii) virtual effects show message, turn light on motors, effectors (a) physical manipulation (i) sensed inputs logical system A B C (c) felt feedback (d)‘electronic’ feedback (b) perceived state see message on screen resistance, ? physical sounds ? turn knob, press button effects on logical objects device physical environment D (iv) physical effects controlling external things (e) physical feedback notice light is on, kettle boils semantic feedback knobs, dials, buttons, location, orientation
  11. 11. multiple feedback loops physical–logical mappings physical aspects knobs, dials, buttons, location, orientation virtual aspects screens, lights, buzzers, speakers (ii) physical effects (iii) virtual effects show message, turn light on motors, effectors (i) sensed inputs logical system B C (d)‘electronic’ feedback see message on screen resistance, ? physical sounds ? (a) physical manipulation A (c) felt feedback (b) perceived state turn knob, press button effects on logical objects device physical environment D (iv) physical effects controlling external things (e) physical feedback notice light is on, kettle boils semantic feedback the GUI fallacy … semantic feedback is NOT enough
  12. 12. model physical device states the device ‘unplugged’ the device ‘unplugged’ switch UP DOWN user pushes switch up and down two visible … and feelable … states physigram
  13. 13. model logical system light OFF ON two states of the system
  14. 14. physical–logical mapping light OFF ON switch UP DOWN user pushes switch up and down
  15. 15. exposed state particularly easy to understand and use but not always 1–1 light OFF ON switch UP DOWN user pushes switch up and down mapping 1–1
  16. 16. controlled state
  17. 17. compliant interaction (1) system state visible through control (2) system and user have similar effects press down UP DOWN press up kettle switch system down system downBOILING Temp < 100 POWER OFF POWER ON system state
  18. 18. 20 bounce-back button OUT IN user pushes switch in bounce back computer OFF ON (a) (a) switch (a) (z)
  19. 19. 21 initial pressure on exposed state switch UP DOWN PART DOWN PART UP press down press down press up press up switch ‘gives’ switch ‘gives’ press down UP DOWN press up shorthand
  20. 20. time-dependent devices (continued pressure) 22 CENTRE IN LEFT IN RIGHT IN twist left twist right CENTRE OUT LEFT OUT RIGHT OUT twist left twist right pull out pull out pull out minidisk
  21. 21. 23 CENTRE LEFT RIGHT twist left (down) twist right (up) 1 down minidisk knob 2 3  (up)  (down) track selected 17 up up up up down down down
  22. 22. give it to designer

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