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Random vs Deterministic Sequencing In RCP BCIs Katie Bradford, Littleton High School Jakob Farnham, Dedham High School Mohammad Moghadamfalahi, Graduate.

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Presentation on theme: "Random vs Deterministic Sequencing In RCP BCIs Katie Bradford, Littleton High School Jakob Farnham, Dedham High School Mohammad Moghadamfalahi, Graduate."— Presentation transcript:

1 Random vs Deterministic Sequencing In RCP BCIs Katie Bradford, Littleton High School Jakob Farnham, Dedham High School Mohammad Moghadamfalahi, Graduate Research Mentor, Northeastern University Deniz Erdogmus, Associate Professor, Electrical and Computer Engineering, Northeastern University

2 What is BCI? Computer interprets brain signal Visual, Auditory, and Tactile

3 Visual BCI Matrix-style Row-Column Presentation (RCP)P-300 response

4 Parameter s Deterministic, no backlight Random Pros Surprises user Cons: Optimization Deterministic Pros: Optimizable Cons: P-300 response Backlight vs. no backlight

5 Optimizing Performance Speed of typing Minimizing error Every user has his or her preferences

6 Experiment s 1.Electrode cap 2.Run calibration session 3.Copy phrase 4.Change parameters 5.Repeat

7 Results Type of TestAUC Median Deterministic, Backlight.8873 Deterministic, No Backlight.7913 Random, Backlight.8786 Random, No Backlight.8149 Quantification of results Deterministic median very close to random

8 Too close to be considered as different with statistical significance (Wilcoxon signed rank test) Deterministic viable for use in BCIs Conclusions Type of TestAUC Median Deterministic, Backlight.8873 Deterministic, No Backlight.7913 Random, Backlight.8786 Random, No Backlight.8149

9 Practical Commercial Products Future Applications Optimize Program

10 Acknowledgment s Thank you! Sina (Mohammad Moghadamfalahi) Paula Bruna Girvent Saleem Karamali Prof. Erdogmus Maddie Leger Maureen Cabrera Claire Duggan Josh Diana +everyone else in the lab for being really awesome and helpful http://images- cdn.moviepilot.com/image/upload/c _fill,h_1794,w_2859/t_mp_quality/h awkingwwe-aliens-asteroids- ourselves-stephen-hawking-outlines- biggest-threat-to-humanity-jpeg- 282934.jpg http://images- cdn.moviepilot.com/image/upload/c _fill,h_1794,w_2859/t_mp_quality/h awkingwwe-aliens-asteroids- ourselves-stephen-hawking-outlines- biggest-threat-to-humanity-jpeg- 282934.jpg http://tinkererforlife.com/content/i mages/2015/01/Stretch_Sensor_mo unted_to_a_hand.jpg http://tinkererforlife.com/content/i mages/2015/01/Stretch_Sensor_mo unted_to_a_hand.jpg http://i.stack.imgur.com/iBCBb.png http://www.oxanis.com/i/p300.png http://www.mdpi.com/1424- 8220/14/4/5967/htm http://www.mdpi.com/1424- 8220/14/4/5967/htm http://www.acceleratingfuture.com/ michael/blog/2008/03/brain- computer-interfaces-for- manipulating-dreams/ http://www.acceleratingfuture.com/ michael/blog/2008/03/brain- computer-interfaces-for- manipulating-dreams/ Pictures

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