Dr. Abioye is a medical doctor who is interested in studying…
Dr. Abioye is a medical doctor who is interested in studying children with a rare neurological disease. She finds several people in an online parent’s support group to participate in her study. She also asks them if they can provide the names and contact information of other people who have children with the same condition. She continues to ask new participants if they know anyone else with the condition. This is an example of what kind of sampling?