1. What counts as evidence in linguistics?

2. WHAT IS UNIVERSAL GRAMMAR? A system of grammatical rules and constraints believed to underlie all natural languages

3. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

4. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

6. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

7. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

8. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

9. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

10. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

11. What counts as evidence for innateness claims Species-specificity domain-specificity the logical problem of language acquisition genetic evidence Universality and topological evidence

12. Brief History

13. The 19 th century: evolutionary biology

14. Brief History The 19 th century: evolutionary biology Early 20 th century: sociology and psychology

15. Brief History The 19 th century: evolutionary biology Early 20 th century: sociology and psychology End of the 20 th century: cognitive psychology/sciences

16. Popper and the principle of the falsification A scientist, whether theorist or experimenter, puts forward statements, or systems of statements, and tests them step by step. In the field of empirical sciences, more particularly, he constructs hypotheses, or systems of theories, and tests them against experience by observation and experiment. Popper.

17. EXPERIMENT By Johnson, Ohio state university, Columbus, Ohio

18. Given sentences

19. For the sentences in table 1 this point should be between the 3 rd and 4 th for list 1 sentences. For the list 2- between the 5 th and 6 th words, and between the 2 nd and 3 rd

21. Results To test the difference between the groups each S scored for the total number of words given correctly for the total number of words given correctly across the 13 trials. The mean for group 1 is 337, for group 2 is 365. for group 2 is 365.

22. Analysis

23. first phrase of the list 1 sentences. The probabilities were computed across all sentences and all Ss.

24. Common misconceptions concerning the nature of the linguistic data “Psychologically real” data

25. Common misconceptions concerning the nature of the linguistic data “Psychologically real” data Spontaneous speech data as privileged evidence

26. Common misconceptions concerning the nature of the linguistic data “Psychologically real” data Spontaneous speech data as privileged evidence Competence data VS performance data

27. Types of empirical data (i) qualitative vs. quantitative data, (ii) direct vs. indirect evidence, (iii) spontaneous vs. elicited data.

28. Types of empirical data (i) qualitative vs. quantitative data (ii) direct vs. indirect evidence (iii) spontaneous vs. elicited data

29. Types of empirical data (i) qualitative vs. quantitative data (ii) direct vs. indirect evidence (iii) spontaneous vs. elicited data

30. Types of empirical data (i) qualitative vs. quantitative data, (ii) direct vs. indirect evidence, (iii) spontaneous vs. elicited data

31. “Third kind” of evidence …Computer modeling