1. Cognitive processes perception – sensation – attention – thinking – imagination – memory – creativity – problem solving Jakub Jura Jakub.jura@fs.cvut.cz http://users.fs.cvut.cz/~jura/ing-psych/ Engineering Psychology

2. What is Cognitive? From latin cognoscere = getting to know Distinguish emotional and rational Descarte’s „Cogito ergo sum“.

3. Cognitive processes Base Cognitive processes: – Perception – Sensation – Attention – Thinking – Imagination – Memory Advanced Cognitive processes – Creativity – Problem solving

4. Sensation Sensation is about sense organ and basic processes on this level. Perception is about creating whole percept.

5. Sensation PerceptionPerceptSence Organ Visual PerceptionImageEye Auditive PerceptionSoundEar Gustatory PerceptionTasteTaste Buds Olfactory PerceptionSmellNose Haptic PerceptionTouch on skinNociceptors ProprioceptionBody positionProprioceptor Human FeromonAffection / antipathy Vomero-Nasal Organ MagnetoceptionImpression of north Unknown

6. Sensation Delusions Mach’s Strips Lateral Inhibition Efect

7. Negative afterimage

8. Perception Perception is perception of diference. Sensuals limits Weber–Fechner law Gestalt law Multistable figures Invariance in perception

9. Weber–Fechner Law Psychophysics Ernest Heinrich Weber (1795–1878) Gustav Theodor Fechner (1801–1887) Stimulus  Percept Stimulus  Sensation  Percept

10. Experiment 1 Dependence of sense impression on the intensity of stimulus Sensum Impresion 1.Sound 2.Light Procedure: a)Set intensity to basic level (L) b)Increase intensity up to one degree (L+1) c)Remember this degree and set intensity up to L+2, L+3, … L+n

11. Weber–Fechner Law dP = k * dS/S, P = k * ln (S/S 0 )  P = k * (  S/S) –P … percept –k … constant –S … stimulus –S 0 … lower possible stimulus

12. Perception Delusionss Which of these circles is bigger?

13. Perception Delusionss Effect of Contrast Lightter Darker

14. Perception Delusionss

16. Gestalt Laws Proximity –We tend to group nearby objects. Similarity –We tend to group objects with similar properties Closure –We are so accustomed to seeing closure that we sometimes close things that aren't.

17. Gestalt Laws Good Continuation –We tend to assign objects to an entity that is defined by smooth lines or curves Pregnantz –We tend to good shape

18. Experiment 2

19. Multistable perception Mind separate figure and backgroun. Unstably between two or more alternative interpretations. Since you see both, you can’t see both. Changing may be under control only partially.

20. Invariance in perception Objects are recognized independent of rotation, translation, scale, elastic deformations, different lighting, and different component features.

21. Neisser's cycle of perception Cognitive Ecology Object available information Schema of environment Exploration Directs Samples Modify Actual world Cognitive map Locomotion and action

22. Memory Sensory memory –George Sperling –(200 – 500 ms) Short-term memory –George Miller –7±2 chunks –Chunking process (recoding) Long-term memory –Hippocampus Memory processes: –Imprint –Retent –Remember –Recognise

23. Ebbinghaus experiments 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1.Co 2.Se 3.Zu 4.Ny 5.Pa 6.Dy 7.Ro 8.Ke 9.Ty 10.Wa 11.Next 1 2 3 4 5 678

24. Ebbinghaus Forgetting Curve R = e -t/s –R …memory retention –s …relative strenght of memory –t …time

25. Memory test How big is capacity of you visual memory? Redraw this figure maximaly precisely

26. Imaging Mental rotation Constructive and Reconstructive processes and eyes movement.

27. Experiment 3 How many times you need to read rotated sign. R Angle ° Time 1 s Time 2

28. Attention Orientation reflex

29. Thinking

30. Problem Solving http://www.studygs.net/problem/index.htm

31. Creativity Preparation Incubation Insight Evaluation Elaboration

32. Metacognition Thinking about thinking (exactly cognition about cognition) First-level metacognition Second-level metacognition