That’s the Dems. The Republicans in Iowa just write their name on the ballot. It is a pure straw poll.
I just found out that each precinct may use different methods. Our Republican ballots do not have names on them, though. They are blank pieces of paper. So I can vote for anyone I want. I live in a ‘village’ so only 25 people will show up - that is probably why we sit around Democrat-style and try to change each others’ minds. Also, in some other smaller precincts, a shove of hands may be used. But, you are correct that, in general, Democrats openly talk to each other and try to get supporters to join their group, while Republicans vote by secret ballot.