The finding
In an experiment with 144 people performing estimation tasks, exposure to others' estimates reduced diversity and increased confidence without corresponding improvements in collective accuracy. The study distinguishes convergence from learning. [1]
What it means for Pingpong
The analogy is relevant to a review chain: once an answer is visible, it can become an anchor. Pingpong explicitly permits later reviewers to depart from earlier responses. That is a reason to study the framing, not a reason to assume the influence disappears.
The limit
This is research on people, not language models. It supplies a conceptual warning rather than direct evidence about Pingpong. Our sequential reviewers share context and cannot be described as statistically independent votes.
Source
How social influence can undermine the wisdom of crowd effect
Jan Lorenz, Heiko Rauhut, Frank Schweitzer, and Dirk Helbing (2011)