Researchers are conducting a cohort study and send out a sur

Researchers are conducting a cohort study and send out a survey. They have a 23% response rate. What type of bias is this?

a. Misclassification

b. Control selection bias

c. Self-selection bias

d. Low sample size

Solution

Since people answer the survey by their choice so it is not a random selection. Therefore it is a self-selection bias. Hence, option c is correct.