Communications of the ACM
AI Index Tracks Emerging Field
Credit: Medium
Since the term "artificial intelligence" (AI) was first used in print in 1956, the one-time science fiction fantasy has progressed to the very real prospect of driverless cars, smartphones that recognize complex spoken commands, and computers that see. In an effort to track the progress of this emerging field, a Stanford-led group of leading AI thinkers called the AI100 has launched the AI Index report that will provide a comprehensive baseline on the state of artificial intelligence and measure technological progress in the same way the gross domestic product and the S&P 500 index track the U.S. economy and the broader stock market.
"The AI100 effort realized that in order to supplement its regular review of AI, a more continuous set of collected metrics would be incredibly useful," says Russ Altman, a professor of bioengineering and the faculty director of AI100. "We were very happy to seed the AI Index, which will inform the AI100 as we move forward."
The AI100 was set in motion three years ago by a charitable gift from Eric Horvitz, a Stanford alumnus and former president of the Association for the Advancement of Artificial Intelligence. Its first report, released in the fall of 2016, sought to anticipate the likely effects of AI in an urban environment in the year 2030.
Among the key findings in the new index are a dramatic increase in AI startups and investment as well as significant improvements in the technology's ability to mimic human performance.
Baseline Metrics
The AI Index tracks and measures at least 18 independent vectors in academia, industry, open-source software, and public interest, plus technical assessments of progress toward what the authors call "human-level performance" in areas such as speech recognition, question-answering, and computer-vision algorithms that can identify objects and activities in 2-D images. Specific metrics in the index include evaluations of academic papers published, course enrollment, AI-related startups, job openings, search-term frequency, and media mentions, among others.
"In many ways, we are flying blind in our discussions about artificial intelligence and lack the data we need to credibly evaluate activity," says Yoav Shoham, professor emeritus of computer science. "The goal of the AI Index is to provide a fact-based measuring stick against which we can chart progress and fuel a deeper conversation about the future of the field."
Shoham conceived of the index and assembled a steering committee including Ray Perrault from SRI International, Erik Brynjolfsson of the Massachusetts Institute of Technology, and Jack Clark from OpenAI. The committee subsequently hired Calvin LeGassick as project manager.
"The AI Index will succeed only if it becomes a community effort," Shoham says.
Although the authors say the AI Index is the first index to track either scientific or technological progress, there are many other non-financial indexes that provide valuable insight into equally hard-to-quantify fields. Examples include the Social Progress Index, the Middle East peace index, and the Bangladesh empowerment index, which measure factors as wide-ranging as nutrition, sanitation, workload, leisure time, public sentiment, and even public speaking opportunities.
Intriguing Findings
Among the findings of this inaugural index is that the number of active AI startups has increased 14-fold since 2000. Venture capital investment has increased six times in the same period. In academia, publishing in AI has increased a similarly impressive nine times in the last 20 years while course enrollment has soared. Enrollment in the introductory AI-related machine learning course at Stanford, for instance, has grown 45-fold in the last 30 years.
In technical metrics, image and speech recognition are both approaching, if not surpassing, human-level performance. The authors note that AI systems have excelled in such real-world applications as object detection, the ability to understand and answer questions, and classification of photographic images of skin cancer cells.
Shoham notes that the report is still very U.S.-centric and will need a greater international presence as well as a greater diversity of voices. He says he also sees opportunities to fold in government and corporate investment in addition to the venture capital funds that are currently included.
In terms of human-level performance, the AI Index suggests that in some ways AI has already arrived. This is true in game-playing applications including chess, the Jeopardy! game show and, most recently, the game of Go. Nonetheless, the authors note that computers continue to lag considerably in the ability to generalize specific information into deeper meaning.
"AI has made truly amazing strides in the past decade," Shoham says, "but computers still can't exhibit the common sense or the general intelligence of even a 5-year-old."
The AI Index was made possible by funding from AI100, Google, Microsoft, and Toutiao. Data supporting the various metrics were provided by Elsevier, TrendKite, Indeed.com, Monster.com, the Google Trends Team, the Google Brain Team, Sand Hill Econometrics, VentureSource, Crunchbase, Electronic Frontier Foundation, EuroMatrix, Geoff Sutcliffe, Kevin Leyton-Brown, and Holger Hoose.
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