I have been collecting data for my dissertation for over a year now, and I still do not have enough participants. I have tried everything I can think of from sending the study out on every list serve I am on to Facebook to flyers. Do you have any suggestions as to how to recruit people for an online study? –Data Collection Rejection Dear Data Collection Rejection, The method of data collection for a dissertation is highly dependent upon the type of study being conducted and the population of interest. For instance, if your study’s population of interest is young adults, you may not need to look any further than your own university for participants.