Dirk Bollen introduced the Nascom in-crowd to the magic world of perception. This gave us a better understanding of how things are perceived. It challenged us to dig a little deeper and find out how we can use this knowledge in our daily work.

1. Perception

5. Energy Sensation
Receiving
information from the
environment
Transduction =
converting sensory
stimulation in neural
activity
Perception
Organising and
interpretation of
sensory
information
(Phenomenology)
Environment Physiology Brain/Cognition

6. Environment
Sensation

7. Sensation
Weak
stimulus
Strong
stimulus
on off
on off

8. Sensation

9. Bottom-up
Top-down
Sensation
Brain / Cognition
From knowledge of previous interactions with the
environment
Information form environment through our senses

14. From vision

16. Environment

17. Environment
Sensation

18. 1.5 mm (1% retina), 50% neural pathways in
eye, 50% visual cortex
Sensation

19. Sensation

20. Sensation
• Red : 64 %
• Green: 32%
• Blue: 2%
120 million 6 million

21. Sensation

22. Sensation

23. Sensation

24. Sensation

25. Sensation

26. D I H C N R L A Z I F W N S M Q P Z K D X
Sensation

27. Sensation

28. Sensation

29. +

33. Top-down

34. Top-down

35. Top-down

36. Top-down

37. Top-down

38. Top-down

39. Top-down

40. Top-down

41. Top-down

42. Top-down

43. Top-down

44. Top-down

45. Top-down

46. Top-down

47. Top-downTop-down

48. Top-down

49. Top-down