Pre notification can be executed through various channels, depending on the study's scope and the target population:
Email: Sending an email is a cost-effective and quick way to reach a large number of potential participants. Postal Mail: Traditional mail can be used when email addresses are not available or when targeting older populations who may be less likely to use email. Phone Calls: Direct phone calls can provide a personal touch and allow for immediate questions and clarifications. Social Media: Leveraging social media platforms can be particularly effective for reaching younger demographics.