
Some students understand a case, have a view, and still say very little when the class discussion begins. The obstacle may not be a lack of ideas alone. It can also be the pressure of turning an unfinished thought into a public contribution while classmates and an instructor are listening.
A newly posted working paper from Columbia Business School offers an intriguing test of whether practice with a voice-based AI discussion partner can help. In a preregistered field experiment involving 759 MBA students across ten course sections, students were assigned to rehearse with a purpose-built AI partner before two class discussions. After a second assigned use, the researchers observed more voluntary contributions in later sessions. The estimated increase was about 31% relative to the sample’s average contribution rate.
The result is promising, but it needs careful interpretation. The paper is an October 2026 arXiv preprint and has not yet been peer reviewed. It studied one professional-degree course at one US business school, and the intervention used a specialised debate partner—not an ordinary chatbot. The finding is best treated as evidence for a design worth testing, not a guarantee that any AI conversation will make students more confident or improve achievement.
What the 759-student field experiment tested
Dan J. Wang and colleagues conducted the study in a required first-year MBA strategy course during Fall 2025. Ten course sections used a case-discussion format. Each of the 759 students was randomly assigned two of ten eligible case sessions for which they could prepare with a voice-based AI tool called CAiSEY. The timing of the two assignments varied across students, allowing the researchers to compare participation before and after students had received different amounts of practice.
CAiSEY was designed around the case students had to read before class. The student selected a position on a discussion question. The AI automatically took the opposing position, and the student defended their view in a spoken exchange. The system challenged arguments and introduced alternative perspectives. After the conversation, the student submitted a written reflection and received an automatically generated summary and feedback.
This was not simply a chatbot asked to summarise a case. Its instructional role was closer to a debate partner: it required the learner to state a position, respond to a challenge, and prepare to explain the reasoning aloud. Instructors and teaching assistants were blind to students’ assignment timing. Teaching assistants recorded contributions during class and distinguished voluntary comments from answers prompted by a cold call.
The researchers analysed several thousand student-session observations. The participation models that separated students’ first and second assigned opportunities included 504 students and 4,787 student-sessions. The study also used midterm and end-of-term surveys to examine students’ reported comfort, focus, motivation, and perceived learning.
What changed—and when
The most important detail is that the effect was delayed and depended on repeated practice. The researchers found no detectable increase in participation during the very class session for which students first prepared with CAiSEY. A first assigned opportunity on its own did not produce a lasting increase in later voluntary contributions.
After the second assigned opportunity, however, students contributed more in the next class and across subsequent sessions. For students whose conversations met the study’s qualifying-use definition, the estimated additional effect corresponded to roughly one extra voluntary contribution every four to five sessions—about 31% of the sample’s average contribution rate. The paper also reports that the positive pattern remained when the qualifying conversation threshold was shortened to four minutes.
Students who used the tool more also reported greater comfort speaking up and greater perceived learning by the end of the course. The researchers did not find corresponding evidence that use increased students’ reported mental focus or motivation. These are different outcomes, and the distinction matters: a student can become more willing to contribute without necessarily feeling more focused or motivated overall.
The 31% figure should not be read as a universal promise or as a 31% improvement in test scores. It describes an estimated change in voluntary classroom contributions after repeated use in this particular course. Participation is a meaningful learning behaviour, but it is not the same as long-term retention, conceptual mastery, or the quality of every contribution.
Why might a voice AI discussion partner help?
The authors propose two related mechanisms. First, rehearsing a case may help students organise what they know. A student who has already stated a position, heard a counterargument, and tried to defend the position may arrive with a clearer starting point. Second, low-stakes practice may reduce the fear of being judged for an imperfect answer. A learner can try an argument, pause, revise it, and respond again without making the first attempt in front of the whole class.
These explanations are plausible, but they should not be confused with proven mediators. The field experiment measured participation and students’ reported experiences; it did not establish that reduced anxiety or improved subject mastery alone caused the behavioural change.
Related peer-reviewed research points in a similar direction while also highlighting the limits of AI-mediated interaction. A 2026 study in Neuron compared brief pre-lecture conversations with a human instructor, an AI instructor, or no instructor interaction among 57 university students. Both human- and AI-led interactions were associated with better performance on difficult comprehension questions than no interaction, and the two instructor conditions did not differ significantly on the measured learning scores. However, students reported less social closeness with the AI instructor and showed lower gaze alignment than with the human instructor. The laboratory study is small, but it reinforces an important distinction: AI can provide some forms of preparation and scaffolding without reproducing the social relationship created by a person.
A six-step pre-class routine teachers can adapt
Teachers do not need to copy CAiSEY or assume that a general-purpose voice chatbot will reproduce the study’s result. They can test the underlying instructional sequence on a small scale, using an institutionally approved tool and a clear alternative for students who cannot or do not wish to use voice AI.
- Ask students to read and think first. Before opening an AI tool, each student reads the assigned material and writes a provisional position, one supporting piece of evidence, and one point they do not yet understand. This protects the learner’s own first attempt.
- Give the AI a bounded opposing role. The student states their position and asks the AI to challenge it with a plausible counterargument based on the supplied case or course material. The AI should not be asked to decide who is right.
- Require spoken defence, not passive listening. The student responds aloud, explains the evidence, and answers one or two follow-up questions. If voice interaction is unavailable, a written dialogue or rehearsal with a peer can serve as an alternative.
- Make verification part of the task. Students check factual claims against the assigned reading and course sources. They should identify unsupported statements, invented references, or arguments that sound persuasive but do not fit the evidence.
- End with a short reflection. Ask students to record which counterargument was strongest, whether they changed or refined their position, and what question they want to raise in class. The reflection should be their own explanation, not an AI-generated summary copied without review.
- Bring one prepared contribution to class. Students arrive with a concise claim, evidence, and an open question. The teacher then invites them to build on, challenge, or revise those ideas through live discussion.
A practical first pilot could use an eight-to-ten-minute rehearsal before one seminar each week for several weeks. That duration is a classroom design choice, not a proven optimum: the Columbia study used a purpose-built tool and found that repeated opportunities mattered more than a single exposure. Teachers should adjust the timing to the age of the learners, the complexity of the material, and the available class time.
How to measure whether students are actually speaking up
Counting comments is useful, but it is not enough. A student who makes several short remarks that do not engage with the topic may not be learning more than a student who makes one thoughtful contribution. A small pilot should therefore combine participation counts with a simple measure of contribution quality.
| Measure | What the teacher can record |
|---|---|
| Voluntary participation | Contributions initiated by students, recorded separately from cold calls or required turns |
| Evidence use | Whether a contribution refers accurately to the reading, data, or course material |
| Reasoning | Whether the student explains why the evidence supports the claim |
| Response to others | Whether the student listens, builds on a peer’s point, or responds constructively to a counterargument |
| Individual understanding | Whether the student can explain the idea independently after the discussion |
| Student experience | A short, optional check-in about confidence, comfort, and perceived usefulness |
Record a baseline before introducing the activity. Compare similar lessons where possible, and note attendance, class size, topic difficulty, and changes in teaching approach. Do not treat a rise in the number of comments as proof of improved learning. Review the quality of reasoning and whether students can explain the material without the tool.
For courses where oral performance is itself an assessed outcome, Prowad’s guide to oral assessment in the AI era offers complementary ways to evaluate explanation and understanding. For a different design problem—how AI should be used during group projects rather than individual preparation—see seven design rules for AI in collaborative learning.
What teachers should not infer from this study
- It does not prove that any chatbot will work. CAiSEY was a purpose-built voice tool tailored to the cases students were preparing. The authors explicitly caution against generalising the result to generic voice chatbots.
- It does not show that AI is better than a human practice partner. The field experiment did not compare CAiSEY with a structured pre-class conversation with another student or a human tutor.
- It does not establish a 31% gain in achievement. The measured primary outcome was voluntary class contributions, not exam scores or long-term retention.
- It does not establish a benefit after one use. The main participation effect appeared after the second assigned opportunity, not immediately after the first.
- It does not automatically generalise to younger learners. The participants were MBA students in a case-based strategy course. Schools should adapt any trial to learners’ ages, language needs, accessibility requirements, and safeguarding rules.
There are also design limitations. The study was conducted at one US business school, and its participation analysis relied on a smaller observed panel than the 759 students initially randomised. Two course sections did not record cold calls separately, which limited the usable participation data. The authors report that the pattern remained in sensitivity analyses excluding a section with reconstructed attendance, but replication in other subjects, institutions, and age groups is still needed.
Protect student agency, privacy, and access
A well-designed rehearsal activity should prepare students to participate—not create a new requirement to disclose private thoughts to an external platform. Schools should approve the tool, understand what it records, set retention and access rules, and avoid uploading identifiable student information unless the relevant data protections and permissions are in place. If transcripts or reflections are reviewed by teachers, students should be told what is collected and how it will be used.
Provide a non-AI route that meets the same learning objective: a peer rehearsal, a written argument map, or a short conversation with the teacher. Check that students can use the activity with assistive technology and that language or speech-recognition limitations do not unfairly penalise them. The purpose is to widen opportunities to practise, not to make access to classroom participation depend on owning a suitable device or speaking with a particular accent.
For students who already rely on AI to produce complete answers, the activity should emphasise the difference between rehearsal and outsourcing. Prowad has discussed the risk of cognitive offloading in its analysis of an AI study assistant that backfired in a university trial. In this setting, the AI should challenge the learner’s reasoning; it should not write the contribution the learner is expected to make.
The practical lesson: rehearse to participate, not to replace discussion
The Columbia working paper adds a useful dimension to the AI-in-education debate. Instead of asking only whether students get higher scores when they use AI, it examines whether a structured AI activity before class changes what students do when they meet their instructor and peers. Its strongest result is not that a chatbot makes students instantly more talkative. It is that repeated, purposeful rehearsal with a specialised voice partner was followed by more voluntary contributions in later sessions.
Teachers can test this idea without turning the classroom into an AI-led environment. Ask students to think independently, rehearse a position, respond to a counterargument, verify the evidence, and arrive ready to speak. Then judge the activity by the quality of the discussion and the learning students can demonstrate without assistance.
The goal is not more AI conversation for its own sake. It is more meaningful human conversation in class.
Research and source notes
- Wang, D. J., Jain, N. M., Burbano, V., Guzman, J., Keum, D., Kim, S., Kogut, B., & Wright, N. (2026). How assigned AI use before class shapes active student engagement in class. arXiv:2610.10463. Preprint submitted 7 October 2026; not yet peer reviewed at the time of writing.
- Peng, Y., Nastase, S. A., Huang, Y., Li, Y., Guo, Z., & Li, P. (2026). Scaffolding human and AI instruction: Neural alignment and learning gains in online education. Neuron, 114(18), 3480–3498.e7.
- Carson, J., et al. (2025). Web-Based AI-Driven Virtual Patient Simulator Versus Actor-Based Simulation for Teaching Consultation Skills: Multicenter Randomized Crossover Study. JMIR Formative Research, 9, e71667.
- Tai, T.-Y., & Chen, H. H.-J. (2024). Improving elementary EFL speaking skills with generative AI chatbots: Exploring individual and paired interactions. Computers & Education, 220, 105112.









