This project studies prototype effects in speech act concepts. It consists of three experiments. **Materials**. The materials consisted of 36 short stories. Each story ended with a speech act by one of the story characters. The stories focused on 6 types of speech acts: questioning, promising, claiming, suggesting, complaining, and apologising. Each speech act was paired with 6 stories. The speech acts in the stories either (i) satisfied all of the relevant features of the speech act type, (ii) had a completely different illocutionary point, or (iii) had the right illocutionary point but did not satisfy all of the other features of the speech act, e.g., had the wrong preparatory or propositional content conditions. **Data** **Exp 1**. 25 participants read the short stories. Afterwards, participants saw the relevant speech act word (e.g., "promise", "claim") and had to indicate whether that word adequately described the speech act. **Exp 2**. 25 participants read the same stories as in Exp. 1. Afterwards, they saw five speech act words and had to select which one best described the speech act in the story. They could also indicate that none of the options was adequate and fill out their own answer, though this was rarely done. **Exp 3**. 25 participants read the same stories as in Exp. 1. Below each story the relevant speech act word was printed. Participants had to rate on a 5-point scale how well this word described the speech act in the story.