A positive norm of reciprocity is "the embedded obligations created by exchanges of benefits or favours among individuals. The recipient feels indebted to the favour or benefit giver until he/she repays" (Chen, 2009). The positive reciprocity norm is a common social expectation where a person who helps another person can expect positive feedback whether it's in the form of a gift, a compliment, a loan, a job reference, etc. In social psychology, positive reciprocity refers to responding to a positive action with another positive action (rewarding kind actions). This norm is so powerful, it allows the initial giver to ask for something in return for what was given rather than having to wait for a voluntary reciprocal act. In some cases, a person does not have to ask for the other person to return a favour because it's already implied. Reciprocity also works at the level of liking; We like people who help us, and dislike those who ask for help but never return it. Disapproval is often enough to make people comply with norm of reciprocity.