What do brain damaged patients, adults saying tongue twisters and all children have in common? They’re more likely to make speech errors than an adult who is speaking under normal circumstances. A common type of speech error in children occurs when one sound persists and interferes with the rest of their phrase. For example, if a child wanted to say the “silly dog,” it might come out the “silly sog.” Young speakers often get stuck on a single sound when what they have just said intrudes on what they’re currently saying. Adult speakers, on the other hand, make far fewer errors and the ones they do make tend to be anticipatory; for these speakers, what they are about to say intrudes on what they’re currently saying. When adults make this kind of speech error, they would say “dilly dog” instead of “silly dog.”