1. HCI Course: The Human Stephen Gilbert June 20, 2014 SPIRE-EIT

2. Inputs & Outputs Vision Hearing Touch Movement

4. Vision

6. Visual Angle / Visual Acuity Spaces detectable at 30 sec – 1 min of visual arc

7. Brightness Luminance is physical (photometer) Brightness is a perception Measured in JNDs –just noticeable difference in luminance Higher luminance –Higher acuity –Higher flicker ( > 50 Hz, periphery)

8. Color HUE SAT. VALUE / BRIGHTNESS

9. Low Blue Acuity 3% blue

10. Colorblindness Protanopia – no red Deuteranopia – no green Tritanopia – no blue rare ~ 8% of males ~ 1% of females

11. Some Illusions

14. The quick brown fox jumps over the the lazy dog.

15. Some Illusions http://persci.mit.edu/gallery YouTube, esp. recent OK Go video and Videos by Brusspup

16. Design Ideas Reading: line lengths 2.3” – 5.2” are good Dark characters on light screen –Negative contrast gives higher luminance Motion in periphery is eye-catching

17. Hearing Pitch Loudness (percept of amplitude) Timbre Cocktail party effect

18. Touch Thermoreceptors (heat /cold) Nociceptors (pressure & pain) Mechanoreceptors –Rapidly adapting (poke) –Slowly adapting (hold) Kinesthesis Try: Two-point Discrimination Threshold

20. Touch: Homunculus SomatosenoryMotor

21. Movement Hick-Hyman law – time to choose Fitts’ law – time to move Reaction Time = a + b log 2 (distance/size + 1) Selection Time = a + b log 2 N

22. Info Processing Model

23. x x PUSH- YES PUSH- YES

24. Stroop

25. BLACK RED GREEN BLACK BLUE RED BLACK GREEN BLUE RED

26. BLACK BLUE GREEN RED BLUE RED BLACK GREEN BLACK

27. Memory Demo

28. #

29. Dog

30. Umbrella

31. Hat

32. iPhone

33. Shoelace

34. Justice

35. Lawnmower

36. Hamster

37. Contract

38. Eggs

39. Book

40. Accordion

41. Javelin

42. Zebra

43. Bat

44. Peg

45. #

46. Memory Demo 2

47. #

48. KEF

49. LAK

50. NEL

51. VEK

52. NER

53. LON

54. NEM

55. BEB

56. SAR

57. FIF

58. #

59. Expected Results Word Position % Recall Average # recalled words = 8

61. Chess Who is winning?

62. Chess Who is winning? How do you know?

63. Chess Who is winning? How do you know? What do you remember? Experts vs. Amateurs

64. Memory

66. 7 +/- 2 Chunks L Q R A Z J N P M Discredited

67. 7 +/- 2 Chunks A B C I B M F B I Discredited

68. Mental Representations Semantic Network Frames Scripts

69. Semantic Network

70. Frames

71. Scripts Entry conditions dog ill vet open owner has money Props exam table medicine instruments Roles vet examines owner brings dog Scenes arrive at reception wait in room examination pay

72. We are not logical…

73. Reasoning ala Wason Fact: –All cards have letter on one side and number on the other Rule: –If there’s a vowel on one side, there’s an odd number on the other side. Question: –Which card(s) do you turn over to verify the rule?

74. Reasoning (2) Fact: –All cards represent people - the person’s drink is on one side, age is on the other. Rule: –If the person is drinking alcohol, he or she must be over 21 Question: –Which card(s) do you turn over to verify the rule?