Discussion among like-minded people shifts the group further in its initial direction.
Moscovici and Zavalloni's 1969 finding, and the reason deliberation among the like-minded does not moderate. Both mechanisms — argument pools and social comparison — push the same direction.
In practice
- A campaign group that meets only itself arrives at a position more extreme than any member began with.
- A team that discusses a risk it already shares leaves the meeting more worried than the sum of what anyone brought.
- Further reading
- Wikipedia
- Subject
- Psychology & Behavior
- Essay
- A century and a half of measuring the mind