How many subjects in a pilot study?

The number of subjects in a pilot study can vary widely depending on the study's goals and design, but typically ranges from 10 to 30 participants. This sample size is usually sufficient to identify potential issues in the study's methodology and to gather preliminary data. However, it is essential to ensure that the sample is representative enough to provide meaningful insights for the larger study. Ultimately, the sample size should be determined based on the specific objectives and constraints of the pilot study.