Methodology
Telephone interviews are conducted according to a survey developed in advance, the course of the interview is completely controlled by CATI (Computer Assisted Telephone Interviewing) – a computerized system of telephone interviews (a computerized telephone surveying technique in which the interviewer follows a script provided by a software application).

A survey is loaded on a main computer that then loads the survey, question after question, on computer screens of the twenty terminals of the call-center. The interviewer reads the questions posed on the computer screen and records the respondent’s answers directly into the computer. The software has built-in branching logic, which will skip questions that are not applicable, rotate questions and response options where necessary.

Advantages of telephone interviewing:

  • human factor mistakes are minimized,
  • all interviews are audio recorded,
  • compliance with criteria of household selection and respondent selection is automatically controlled,
  • level of respondent reach is higher compared to face-to-face interviewing,
  • sample is geographically dispersed (limitations on the number of sampling points are removed),
  • interviews are dispersed within a settlement (not limited to only a few routs),
  • methodological experience is unified – one team of trained interviewers-operators (with similar experience and work style) conducts survey over all research territory,
  • sample is automatically controlled according to given parameters,
  • surveys with complex structure are administered,
  • efficiency.

How shall I use NodeXL software for the analysis and visualization of an ego-network from the VK.com service?

1. Download and install NodeXL Excel Template 2014.
http://nodexl.codeplex.com/releases
The NodeXL Excel Template 2014 software helps to visualize and analyze the network graph created by data from the Excel worksheet with vertices and edges lists.

You need a ".graphml" file to proceed further. In order to create it, please do not hesitate to read the brief introduction to NodeXL before starting applying GEPHI.
1. Download and install Gephi: http://gephi.github.io/users/download/.
Open the graphml file saved in advance with the help of NodeXL.