The aim of the study was to study quality of measurement (reliability and validity) of measurement of ties in egocentered social networks. It was expected that sensitive questions would have higher quality of measurement on telephone anonymity) and cognitively more demanding questions would have higher quality of measurement in personal interview. Ties with core network members and network members providing emotional, informational and financial support would have higher quality of measurement. Quality of measurement would also be affected by personal characteristics of the respondent (such as age, sex, personality traits). Measurement instrument for measuring personal characteristics such as extraversion and emotional stability are Slovene version of measurement instrument, developed in the frame of international project "International Personality Item Pool" under leadership of L. R. Goldberg.