This study is about finding the best way to get more patients to join clinical research using messages sent through MyChart, an online tool where patients can check their health records. Many studies struggle because not enough people join them. This study will test four different types of messages to see which one gets more people interested. The messages will be sent to patients who might be able to join a study. The study will look at how many people respond to these messages, whether they show interest or not, and if they change their settings to receive fewer messages in the future. Researchers will also talk to some patients about what they thought of the messages.

• Length of study: Ongoing with different tests on message types.
• Participation: Patients must be adults using MyChart.
• Compensation: Information about payment may be included in some message types.