1. Lecture 7: Cognitive Science A Necker Cube http://en.wikipedia.org/wiki/Necker_Cube

3.  Many phenomena look as though mental representations are what’s important, not the stimuli themselves Your mental representation determines what you ‘see’

4. 25 X 15 125 25 375

7.  the nature of concepts How do these things figure in our mental life? What’s the nature of the representation? [http://en.wikipedia.org/wiki/Dog]

12.  Vision – not much to work with (from http://webvision.med.utah.edu/book/part-i-foundations/simple-anatomy-of-the-retina)

15. (Figure 2 from Marr & Nishihara (1978: 274)

16. (from http://www.doc.gold.ac.uk/~mas02fl/MSC101/Vision/Marr.html)

17.  Background: we’ve been assuming the ‘classical’ model of cognitive architecture  The mind works directly with mental symbolic representations of various sorts (phrase-structure trees for syntax, family-resemblance clusters for concepts, etc etc.)  Beginning of the 80’s:  Move cognitive science closer to neuroscience  Mind works with artificial neural networks, not representations

18. A connectionist model in action (from Stillings et al. (1995))

19. 7 -4 7 -3 77 7 -10 A connectionist model in action (from Stillings et al. (1995)) Input layer Hidden Layer Output layer

20. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 -3 77 7 -10

21. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 -3 77 7 -10 00

22. The XOR Function Input 1Input 2Output 000 101 011 110 -3 7 7 00

23. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 -3 77 7 -10 01

24. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 4 77 3 -10 01

25. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 4 77 3 4 01

26. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 4 77 3 4 10

27. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 -3 77 7 -10 11

28. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 11 77 7 -10 11

29. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 11 77 -10 11

30. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 11 77 -10 11

31. The XOR Function Input 1Input 2Output 000 101 011 110 7 -4 7 11 7 -3 11