I've never heard of the Asch Experiment, but this video is worth watching.
[Kaplinsky's article](https://robertkaplinsky.com/psychology-classroom-discussions/) gives some good classroom ideas on how to avoid groupthink in student responses, even highlighting the Desmos teacher view to anonymize responses (which _also_ works [outside of math](https://blog.ohheybrian.com/2017/04/desmos-in-science/).
During student teaching, questioning was the first thing my training teacher worked on with me. I was prone to asking, "Who knows..." which left the door open to zero responses. Moving to direct questions, "What is...?" or "How does...?" removes escape. I also recall another great post (I can't find it now) about leaving uncomfortable silence after asking a question. Letting several hands go up in the air allows for discussion as you can call on more than the first student.
Mixing Kaplinsky's ideas with leaving room for responses is a great way to help students feel comfortable with replying, even if they disagree with others.
[Read the original article here](https://robertkaplinsky.com/psychology-classroom-discussions/).