From Nielson Norman Group: https://www.nngroup.com/articles/intentional-silence-ux/
Summary: Keeping quiet is a powerful moderation technique for user interviews, usability testing, and workshop facilitation. Well-timed, deliberate periods of silence elicit thoughtful, accurate responses and insights, and build trust with participants.
The Disgust for Hush: A Universal Pattern
Silence.
Dead air.
Crickets.