Following my previous question, is there any possible solution for participants’ attrition?

My pleasure.

Many thanks for the introduction.

In some similar evaluations, “routine” strategies in longitudinal research design are used, including collecting as much information as possible, particularly essential contact information. As well, participants could be given a business card with the telephone number (toll-free) of a research contact as well as the team’s e-mail address. A classic technique, highly recommended by evaluators, is to make it a priority that the same person maintains contact with the participants, which promotes trust and ensures greater validity of results. Associated techniques are also used to keep track of study participants, such as obtaining authorization to communicate with others to obtain new contact information, to communicate with family members and/or friends, and contact participants via social networks, and so on. Besides, the strategy that proved to be most effective in the prison context is that of asking permission to communicate with the participants’ probation officer to obtain current contact information. Other techniques can also be used to promote participant retention and involve the characteristics of interviewers, the relationship between the interviewer and the participant, and the motivation of the participant.