“…In the ESS study, interviewers are sent (to respondents) depending on their area of residence (to reduce travel costs), this factor and other characteristics of the interviewer (such as experience, personality traits, extraversion) has a decisive influence on the consent of the respondent. The results of research conducted by R. Groves [9] showed that in addition to the characteristics of the interviewer (the probability of agreement increases with increasing experience of the interviewer) such factors as the region of residence of the respondent, population density, socio-economic situation, ethnic group, religion and characteristics of housing have a significant influence, optimization of the process of recruiting respondents is especially relevant in the context of the study of weighing the opinions of respondents in accordance with their professional status, education experience [10]. J. Shinn [11] concludes that the characteristics of the area (number of apartments and population density) are also predictors of lack of response.…”