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AI Tutors: Why we need them and How they will work
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Anshul Bhagi
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May. 15, 2017
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AI Tutors: Why we need them and How they will work
May. 15, 2017
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875 views
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Technology
A tech talk by Anshul Bhagi at Harvard Business School.
Anshul Bhagi
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AI Tutors: Why we need them and How they will work
1.
AI Tutors Why we need them and how they will work. Anshul Bhagi MIT ‘11 / ‘12 HBS ‘17 1
2.
4 takeaways for today 1) 1-on-1 tutors are great but don’t scale 2) Scalable + effecHve AI tutors are within reach 3) Basic approach to making machines ‘understand’: vector representaHon of words / knowledge 4) Go-to-market strategy for AI tutors: narrow domains, retrieval based, human-first 2 AI Tutors: tech-talk @ HBS. Anshul Bhagi
3.
Why AI for Ed? 1 on 1 tutor for everybody, any7me, anywhere 3 Source: Bloom (1984) research on impact of 1-on-1 tutoring AI Tutors: tech-talk @ HBS. Anshul Bhagi
4.
Why now: AI tutors are within reach Jill Watson + 4 AI Tutors: tech-talk @ HBS. Anshul Bhagi
5.
What AI Tutors can do Answer ques7ons based on past Q&A “Read”, “learn”, and share knowledge Generate ques7ons for text they see Have long conversa7ons, be personal assistants to students Informa7on Retrieval Neural Ques7on Genera7on Machine Comprehension Intent-classifica7on, Reinforcement Learning, Long-term memory, etc. Retrieval vs. GeneraHve Closed-Domain vs. Open-Domain 5 AI Tutors: tech-talk @ HBS. Anshul Bhagi
6.
old way: based on text similarity new way: based on meanings Informa7on Retrieval finding answers to quesHons 6 AI Tutors: tech-talk @ HBS. Anshul Bhagi
7.
“Seman7c Space” and word vectors • Turn words into mulH-dimensional vectors • SemanHcally similar words closer together
7 AI Tutors: tech-talk @ HBS. Anshul Bhagi
8.
Emoji vectors 8 Source: Dango messaging app. Learned representaHons of Emojis in 2D space. AI Tutors: tech-talk @ HBS. Anshul Bhagi
9.
From word vectors to sentence vectors 1) Use word counts (TF-IDF) 2) Take average of word vectors (pre-trained) 3)
Create sentence vectors using neural predicHon approach (Doc2Vec) 9 AI Tutors: tech-talk @ HBS. Anshul Bhagi
10.
Ques7ons as vectors finding closest past quesHon -> answer 10 AI Tutors: tech-talk @ HBS. Anshul Bhagi
11.
SochoBot Live Demo 11 AI Tutors: tech-talk @ HBS. Anshul Bhagi hips://www.youtube.com/watch?v=azzLNPU17Go