Working towards mind reading
- 1. N400Working towards mind reading
- 2. Brain Computer InterfacingCreating a direct link between your brain and a computer
- 3. That sounds an awful lot like mind reading...
- 4. Work towards mind readingBCI
- 5. Can a computer detect what I am thinking about?Not directly (yet)
- 6. What can we detect?Relaxation (alpha waves)Imagined movement (ERD/ERS)Recognition (P300)Annoying flashing lights (SSVEP)Priming (N400)...Simple physiological responses
- 7. N400Discovered during a language studyReading senseless sentences:I drink coffee with cream and sugarI drink coffee with cream and socks
- 11. ERP2 words
- 12. How can we use this for mind reading?Let the subject choose his own primeDon’t prime on a stimulus, but prime only by thinking about the objectGuess the prime by showing different probes
- 13. Experimental setupGive one of two possible physical objects to subjectLo beep – close eyes and think about objectHi beep – open eyesShow a probe word that is related to one of the two possible objects, record EEGCan the computer tell which object was shown?
- 14. ERPonly a probe word
- 15. ERPonly a probe word
- 16. Future researchbuilding a search tree
- 17. ChallengesWhen no result: problem in experiment, recording or data processing?Process of eliminationMore neuroscience than computer scienceRead up on neuroscienceAmbiguous results: only works on some subjectsVerify results with statistics and control scenarios
- 18. ?