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A pharmaceutical company recruits participants for a clinical trial exclusively through social media and online health forums. The final sample of 500 participants is entirely tech-savvy and health-conscious, with average age 38 and 85% having college degrees. Which type of bias is MOST directly introduced by this recruitment strategy?
A pharmaceutical company recruits participants for a clinical trial exclusively through social media and online health forums. The final sample of 500 participants is entirely tech-savvy and health-conscious, with average age 38 and 85% having college degrees. Which type of bias is MOST directly introduced by this recruitment strategy?