Voting by show of hands is a accessible social protocol that can be used to make group decisions.

Procedure

All options are presented to the voters in order. This order might be predetermined or randomly chosen. For each option, each party elligible to vote has three options:

Raising their hands: this inditaces support of the option.
Lowering their hands: this indicates rejection of the option.
Neither raising not lowering their hands: this indicates neither support nor rejection of the option. In some cases, this might be interpreted as being neutral on the option. In other cases, it might mean the user refrains from voting on the option, and in doing so forfeit their right to appeal the decision.

One round of voting might be followed by more. A new round may be planned before the first round, or be initiated by no option having seen enough support by the voters to be chosen over the others.

Characteristics

This protocol is characterised by its accessibility: no additional equipment (e.g. ballots) are required in the procedure of voting. If voting is done publicly, it does not require a neutral party to count the votes. In this case, however, it does not provide anonimity to the voters.