Abstract The current study examines developing changes in children's intuitions about why disagreements about decisions might occur, focusing on what children understand about partiality and how it may vary depending on the context. Eighty children ages 6 to 13 years old and 20 adults were presented with stories in which there was a disagreement with the judge about who the winner of a contest should be. Participants were asked to generate their own explanations for why the disagreement may have occurred and to evaluate the plausibility of different explanations provided by the experimenter. Even 6-year-olds generated and endorsed partiality as a possible explanation for disagreement, although they did so at a lower rate than older children. A richer understanding of how context influences both the reasons for disagreement and the likelihood of partiality seems to develop over childhood.