To aid in teaching dialogue skills a virtual simulator called "Communicate!" was developed at Utrecht University. Teachers can build scenarios for students to practice dialogues with a virtual character. In two experiments (n = 128 and 133, a year apart), we investigated if and how "Communicate!" can be an effective aid to study and practice dialogue skills, by comparing it to traditional "passive" learning tools, such as literature-study and a lecture, in an undergraduate psychology dialogue-skills course. Students were divided into four groups, two of which both read an article about conducting a bad-news dialogue and played a "bad-news-dialogue-scenario" (but in a different order), while the third group only played the scenario. The final group only read the article (expt. 1) or also attended a lecture on the topic (expt. 2). Playing a scenario improved performance on a different scenario played later. It increased the students' reported engagement and motivation to learn about this topic, compared to reading the article, whereas their reported self-efficacy decreased, which may indicate a recognized learning need. It also increased the score on an MC-knowledge test on this type of dialogue. This suggests that online dialogue simulations aid studying (basic) dialogue skills, by providing flexible, authentic learning experiences.