Asking a few friendly questions, and then explaining the purpose and ground rules of the interview. Interviews facilitate the development of intimate personal relationships that ensure congenial human relations and mutual understanding. The interview provides an opportunity to assess the subjective aspects of the interviewee. Facial expressions, appearance, mental strength, communication style, etc., can be evaluated during the interview. The interview is the only medium to establish a quick rapport with the other party. It provides an opportunity for direct interaction between two persons and fosters quick friendship.
These scores are considered to have directionality and even spacing between them. In a double-blind study, both participants and experimenters are blinded. What is the difference between single-blind, double-blind and triple-blind studies? If participants know whether they are in a control or treatment group, they may adjust their behavior in ways that affect the outcome that researchers are trying to measure.