Participant recruitment agencies - recommendations [closed]

1. What is a problem with recruiting research participants through the Internet?
2. What are the most important pieces of information to provide to a participant during recruitment?
3. How long does it take to recruit participants for a study?

What is a problem with recruiting research participants through the Internet?

The issues in the recruitment process include those related to low response rates, selected groups of participants, the importance of timing, and potential ethical issues.

What are the most important pieces of information to provide to a participant during recruitment?

All recruitment materials should include the study title, a short description of the study and the purpose, inclusion criteria (who can participate) and any exclusion criteria (who cannot participate), the time commitment for participation, brief information on what will be asked in a survey or interview, funding for ...

How long does it take to recruit participants for a study?

To answer your question on a recruitment phase. I would say — and this is just by the seat of my pants — you need to allow a good two to three months for a recruitment phase, if there's really a solid plan.