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syntax 8 On-line processing DAY 37 – nov 22, 2013

syntax 8 On-line processing DAY 37 – nov 22, 2013. Brain & Language LING 4110-4890-5110-7960 NSCI 4110-4891-6110 Harry Howard Tulane University. Course organization. The syllabus, these slides and my recordings are available at http://www.tulane.edu/~howard/LING4110/ .

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syntax 8 On-line processing DAY 37 – nov 22, 2013

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  1. syntax 8On-line processingDAY 37 – nov 22, 2013 Brain & Language LING 4110-4890-5110-7960 NSCI 4110-4891-6110 Harry Howard Tulane University

  2. Brain & Language - Harry Howard - Tulane University Course organization • The syllabus, these slides and my recordings are available at http://www.tulane.edu/~howard/LING4110/. • If you want to learn more about EEG and neurolinguistics, you are welcome to participate in my lab. This is also a good way to get started on an honor's thesis. • The grades are posted to Blackboard.

  3. Brain & Language - Harry Howard - Tulane University Review

  4. Brain & Language - Harry Howard - Tulane University Cross-modal priming & trace reactivationsentence presented auditorily; prime & probe visually prime 16) Which bookidid the harassed parent almost purchase ti for her child? faster for related same for both faster for related probe: library/ vehicle

  5. Brain & Language - Harry Howard - Tulane University Self-paced reading & subject-object • The data: reading time for us 20a) My brother wanted to know if Ruth will bring ushome to Mom at Xmas. 20b) My brother wanted to know who will bring ushome to Mom at Xmas. 20b) My brother wanted to know whoitiwill bring ushome to Mom at Xmas. 20c) My brother wanted to know who Ruth will bring ushome to at Xmas. 20c) My brother wanted to know whoi Ruth will bring ushome to tiat Xmas. • Which one should be slowest? • (20c) because us is a possible site for the gap/trace of who.

  6. Brain & Language - Harry Howard - Tulane University Neural Imaging & on-line sentence processing

  7. Brain & Language - Harry Howard - Tulane University Dipoles, 3

  8. Brain & Language - Harry Howard - Tulane University Result of electrical currents: EEG

  9. Brain & Language - Harry Howard - Tulane University Scalp EEG • Scalp EEG is collected from tens to hundreds of electrodes positioned on different locations at the surface of the head. • EEG signals (in the range of millivolts) are amplified and digitalized for later processing.

  10. Brain & Language - Harry Howard - Tulane University The 10-20 system • The "10" and "20" refer to the fact that the actual distances between adjacent electrodes are either 10% or 20% of the total front-back or right-left distance of the skull. • Each site has a letter to identify the lobe and a number to identify the hemisphere location. The letters F, T, C, P and O stand for Frontal, Temporal, Central, Parietal, and Occipital, respectively. • Note that there exists no central lobe, the "C" letter is only used for identification purposes only. • A "z" (zero) refers to an electrode placed on the midline. • Even numbers (2,4,6,8) refer to electrode positions on the right hemisphere, whereas odd numbers (1,3,5,7) refer to those on the left hemisphere. • Two anatomical landmarks are used for the essential positioning of the EEG electrodes: first, the nasion which is the point between the forehead and the nose; second, the inion which is the lowest point of the skull from the back of the head and is normally indicated by a prominent bump.

  11. Brain & Language - Harry Howard - Tulane University Semantic vs. syntactic ERPs • The data • The boat sailed down the river and sank. • The boat sailed down the river and ate. • The boat sailed down the river sank. • How would you characterize these sentences? • well-formed • semantically anomalous • syntactically anomalous

  12. Brain & Language - Harry Howard - Tulane University ERPs to last verb in sentenceFig. 13.4 – Ingram doesn’t reveal source What does the scale mean? Where does the dashed line diverge most from the solid line? Where does the dotted line diverge most from the solid line?

  13. Brain & Language - Harry Howard - Tulane University What do they do? • N400 • A temporarily localized increase in processing load caused by a discrepancy in between the meaning of a word and its sentential context. • P600 • A sustained effort to reinterpret or re-parse a garden path sentence. • However, these two may be too slow to reflect modular lexical or syntactic processing. • So lets look at a faster ERP.

  14. Brain & Language - Harry Howard - Tulane University The early left anterior negativityN150 or ELAN Basic flaws in phrase structure: The shirt was on the hanger. The shirt was ironed. *The shirt was on ironed.

  15. Brain & Language - Harry Howard - Tulane University Modular vs. interactive processingTable 13.1. adapted from Frisch et al. (2004) Modular: an error found early could turn off additional processing. Interactive: errors should add up.

  16. Brain & Language - Harry Howard - Tulane University NEXT TIME There is no quiz. Ingram §14, Agrammatism revisited

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