Also, national and international sources track trends related to tourism. The Ohio Division of Travel and Tourism, Research Office collects, maintains, and distributes statistics on Ohio tourism for your use. These are the types of surveys and the advantages and disadvantages of each type. The social interaction between a well-trained interviewer and respondent in a personal interview increases the likelihood that the respondent will answer all the items on the questionnaire.
Personal interviews provide the opportunity for feedback to the respondent.
An important characteristic of personal interviews is the opportunity to probe. In contrast to the personal interview the mail survey is cheaper. In a mail survey, the respondent can take more time to collect facts, talk with others or consider replies at length than is possible with the personal interview. Another value in using mail is that we can contact respondents who might otherwise be inaccessible. Finally mail surveys are typically perceived as being more impersonal providing anonymity than the other survey types.