Which method is not commonly used for voting in meetings?

The method identified as not commonly used for voting in meetings is the incidental vote. While incidental votes can be part of the procedural process in parliamentary procedures, they are not primarily utilized as a direct method for making decisions during meetings. Instead, incidental votes are generally more about procedural matters, such as raising points of order or addressing incidental motions that arise during discussions.

In contrast, the other methods—voice vote, show of hands, and ballot vote—are widely used for determining the outcome of motions. A voice vote allows participants to indicate their approval or disapproval aloud, making it a quick and informal method. A show of hands provides a visual and immediate way for members to vote, which also allows for quick tallying. The ballot vote is a more formal approach, often used for sensitive issues or when anonymity is desired, allowing participants to cast their votes privately on slips of paper or electronic devices. Each of these methods serves a specific purpose in ensuring that voting in meetings is efficient and clear, unlike incidental voting, which does not function in the same direct capacity for decision-making.