As an additional method in a psychological research tests are used.
the Number of positive and negative elections is fixed by
on a matrix then count their percent. By means of a sociometric research it is possible to reveal the real place of the personality in collective with her business qualities, popularity, the interpersonal relations.
By means of a biographical research it is possible to collect the large volume of material that gives the grounds to consider the received answers rather probable. Shortcomings of this method is the subjectivity, accident of answers, complexity of check of their correctness and sincerity.
One of options of a conversation is the interview which is used in psychological and sociological researches. In an interview there are thoughts, opinions, the facts from the respondent's life, i.e. experimental, his relation to political events, situations, the social phenomena, etc.