Dave Said It Was the Butler Very Loudly, and Now Everyone Agrees

Every murder mystery group has a Dave. He is the one who stands up in the middle of the final round, announces the culprit in a voice that carries to the next room, and watches 6 other people nod slowly as though he has just solved the case. Nobody checked his reasoning, nobody asked what his clues were, and nobody noticed that the quiet woman by the bookshelf had been holding the one piece of evidence that proved him wrong.

This happens at nearly every table, and the reason is a lot more interesting than Dave being annoying. Psychologists have spent years studying why confident people sound smart, and the findings explain a surprising number of bad accusations. Once you know how it works, you can run a game night where the best answer wins instead of the loudest one.

The Confidence Heuristic: Sounding Sure Beats Being Right

Researchers Paul Price and Eric Stone ran a set of experiments in which college students listened to fictional financial advisors predict whether 24 imaginary stocks would rise. The advisors who sounded more certain were preferred, and the cautious ones were passed over. When participants were asked which advisor they would rather hire, about two-thirds picked the overconfident one.

The twist is that the 2 advisors had predicted the same number of outcomes correctly. Most participants still rated the confident advisor as more knowledgeable, which led Stone to describe the pattern this way: people treat confidence as a sign of accuracy, so 2 people with equal knowledge get judged differently based on how sure they sound. That shortcut is called the confidence heuristic, and it makes a lot of sense in everyday life, where confident people often do know more. It just fails badly in a room full of strangers who all hold different pieces of the same puzzle.

Dominant Voices Get Credit for Competence

A second line of research makes the problem even clearer. Cameron Anderson and Gavin Kilduff at UC Berkeley’s Haas School of Business put 68 unacquainted students into teams of 4 and gave them 45 minutes to tackle a task, with a cash prize for the winning team. Afterward, the participants rated how competent and influential each teammate had been. The most dominant members were rated highest for intelligence, dependability, and self-discipline, while the quieter members were rated as more conventional and less creative.

In a follow up experiment, teams worked through math problems taken from old GMAT exams. The people who spoke more were seen as the group’s leaders, and being correct did not seem to matter. Speaking often was what counted, and the leaders did not even need to supply the final solution. In other words, volume works like a credential, and a group will hand it out to whoever claims it first.

Why Game Night Makes It Worse

A murder mystery is almost a perfect setup for the confidence heuristic. Nobody knows the answer until the reveal, so there is no way to check anyone’s claim in the moment. The final accusation usually happens with a clock running and a few drinks in, and under that kind of pressure, people look for a shortcut. The easiest shortcut available is whoever sounds the most certain.

There is also a social piece. Once 2 or 3 people nod along with a confident guess, the others tend to follow, because disagreeing now feels like picking a fight. We wrote about this pile-on effect in our post on what happens when everyone accuses the same person immediately, and it often has less to do with the evidence and more to do with who spoke first and loudest.

The Quiet Player Is Often Holding the Clue

Here is the part that makes this more than a personality quirk. In our games, each character has their own information, so the clue that breaks the case may be sitting in the hands of the guest who is least likely to announce it. A shy player who mentions in passing that the butler was in the garden at 8 PM has just handed the table a piece of evidence, and if a louder voice talks over it, the whole group loses it.

That is a big reason we believe quiet players often make the best detectives. They listen more than they talk, they notice what does not line up, and they tend to wait until they have something solid before speaking. Those habits are exactly what a mystery rewards, and they are exactly what the confidence heuristic punishes.

How to Keep the Loudest Voice From Running the Vote

The easiest fix is to have everyone write down their accusation before anyone speaks. A slip of paper or a voting page works fine, and the key is that nobody can change their answer after hearing Dave. Reveal the votes at the same time, and you will often find that the table was more divided than it sounded.

Before the vote, give each person 30 seconds to name one piece of evidence for their pick, going around the table in order so the quiet guests are not left to fight for airtime. Ask for the reason instead of the conclusion, because a reason can be checked and a confident tone cannot. If you are the host, you can also introduce the vote with a simple line like “tell me what you noticed, not just who you think it is,” which gives everyone permission to share details without sounding dramatic.

Does This Mean Loud Players Are Bad?

Not at all. The loud player is usually the reason the party is fun, and a table without a Dave can feel a bit flat. Confident players keep the energy up, start conversations, and make the accusations entertaining, so the goal is not to mute anyone. The goal is to make sure the volume does not get counted as proof.

If you happen to be the loud one, you can use your powers well. Say how sure you are and also what you are basing it on, invite someone else to poke holes in your theory, and ask the quiet people what they saw. It makes you a better detective and a better guest, and it makes the final reveal a lot more satisfying when you do turn out to be right. Our post on introverts and extroverts in mystery games goes deeper on how different personalities can play to their strengths.

Bigger Rooms, Bigger Echo

The more people in the room, the more this effect grows, since a confident claim has more listeners to persuade and fewer chances for a quiet guest to jump in. If you are hosting a large group, structure matters even more. Wizard’s Farewell Feast is our largest kit and scales all the way up to 24 characters, and with a crowd that size, written votes and a go-around for evidence keep the night from turning into a shouting match.

Break big groups into smaller conversations during the investigation rounds so more people get to speak, and save the full-table discussion for the end. That way the accusation is built from many small exchanges instead of a single loud one, and the person who solves the case is more likely to be the person who earned it.

The Takeaway for Your Next Game Night

Confidence feels like intelligence, and the research says our brains treat it that way even when the facts do not back it up. At a murder mystery, that habit can lead a whole table to the wrong suspect with total conviction. Write down votes first, ask for evidence instead of volume, and make room for the guest who has barely said a word, because they might be the only one who has the answer.