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Jared Bauer summarizes results of a study I suggested this spring. 202 developers were randomly assigned GitHub Copilot, while the others were instructed not to use AI tools.  The participants were asked to complete a coding task.  Developers with GitHub Copilot had 56% greater likelihood of passing all unit tests. Other developers evaluated code to assess quality and readability.  Code from developers with GitHub Copilot was rated better on readability, maintainability, and conciseness.  All these differences were statistically significant.

We tested Microsoft Copilot in multilingual contexts, examining how Copilot can facilitate collaboration between colleagues with different native languages.

First, we asked 77 native Japanese speakers to review a meeting recorded in English. Half the participants had to watch and listen to the video. The other half could use Copilot Meeting Recap, which gave them an AI meeting summary as well as a chatbot to answer questions about the meeting.

Then, we asked 83 other native Japanese speakers to review a similar meeting, following the same script, but this time held in Japanese by native Japanese speakers. Again, half of participants had access to Copilot.

For the meeting in English, participants with Copilot answered 16.4% more multiple-choice questions about the meeting correctly, and they were more than twice as likely to get a perfect score.  Moreover, in comparing accuracy between the two scenarios, people listening to a meeting in English with Copilot achieved 97.5% accuracy, slightly more accurate than people listening to a meeting in their native Japanese using standard tools (94.8%). This is a statistically significant difference (p<.05). The changes are small in percentage point terms because the baseline accuracy is so high, but Copilot closed 38.5% of the gap to perfect accuracy for those working in their native language (p<0.10) and closed 84.6% of the gap for those working in (non-native) English (p<.05).

 

Summary from Jaffe et al, Generative AI in Real-World Workplaces, July 2024.

Teams at Microsoft often reflect on how Copilot helps.  I try to help these teams both by measuring Copilot usage in the field (as they do their ordinary work) and in lab experiments (idealized versions of their tasks in environments where I can better isolate cause and effect).  This month I ran an experiment with CELA, Microsoft’s in-house legal department.  Hossein Nowbar, Chief Legal Officer and Corporate Vice President, summarized the findings in a post at LinkedIn:

Recently, we ran a controlled experiment with Microsoft’s Office of the Chief Economist, and the results are groundbreaking. In this experiment, we asked legal professional volunteers on our team to complete three realistic legal tasks and randomly granted Copilot to some participants. Individuals with Copilot completed the tasks 32% faster and with 20.3% greater accuracy!

Copilot isn’t just a tool; it’s a game-changer, empowering our team to focus on what truly matters by enhancing productivity, elevating work quality, and, most importantly, reclaiming time.

All findings statistically significant at P<0.05.

Full results.

Early LLM-based Tools for Enterprise Information Workers Likely Provide Meaningful Boosts to Productivity. Microsoft Research Report – AI and Productivity Team. With Alexia Cambon, Brent Hecht, Donald Ngwe, Sonia Jaffe, Amy Heger, Mihaela Vorvoreanu, Sida Peng, Jake Hofman, Alex Farach, Margarita Bermejo-Cano, Eric Knudsen, James Bono, Hardik Sanghavi, Sofia Spatharioti, David Rothschild, Daniel G. Goldstein, Eirini Kalliamvakou, Peter Cihon, Mert Demirer, Michael Schwarz, and Jaime Teevan.

This report presents the initial findings of Microsoft’s research initiative on “AI and Productivity”, which seeks to measure and accelerate the productivity gains created by LLM-powered productivity tools like Microsoft’s Copilot. The many studies summarized in this report, the initiative’s first, focus on common enterprise information worker tasks for which LLMs are most likely to provide significant value. Results from the studies support the hypothesis that the first versions of Copilot tools substantially increase productivity on these tasks. This productivity boost usually appeared in the studies as a meaningful increase in speed of execution without a significant decrease in quality. Furthermore, we observed that the willingness-to-pay for LLM-based tools is higher for people who have used the tools than those who have not, suggesting that the tools provide value above initial expectations. The report also highlights future directions for the AI and Productivity initiative, including an emphasis on approaches that capture a wider range of tasks and roles.

Studies I led that are included within this report:

• Measuring the Impact of AI on Information Worker Productivity
• Sound Like Me: Findings from a Randomized Experiment
• Randomized Controlled Trial for Microsoft Security Copilot

Sound Like Me: Findings from a Randomized Experiment. SSRN Working Paper 4648689. With Donald Ngwe.

A new version of Copilot for Microsoft 365 includes a feature to let Outlook draft messages that “Sound Like Me” (SLM) based on training from messages in a user’s Sent Items folder. We sought to evaluate whether SLM lives up to its name. We find that it does, and more. Users widely and systematically praise SLM-generated messages as being more clear, more concise, and more “couldn’t have said it better myself”. When presented with a human-written message versus a SLM rewrite, users say they’d rather receive the SLM rewrite. All these findings are statistically significant. Furthermore, when presented with human and SLM messages, users struggle to tell the difference, in one specification doing worse than random.

(Also summarized in What Can Copilot’s Earliest Users Teach Us About Generative AI at Work? at “Email effectiveness.” Also summarized in AI and Productivity Report at “Outlook Email Study.”)