The study of interpersonal attraction is a major area of research in social psychology. Interpersonal attraction is related to how much we like, dislike, or hate someone. It can be viewed as a force acting between two people that tends to draw them together and resist their separation. When measuring interpersonal attraction, one must refer to the qualities of the attracted as well as the qualities of the attractor to achieve predictive accuracy. It is suggested that to determine attraction, personality and situation must be taken into account. Repulsion is also a factor in the process of interpersonal attraction, one's conception of "attraction" to another can vary from extreme attraction to extreme repulsion. Group work is a form of cooperative learning. It aims to cater for individual differences, develop students' knowledge, generic skills (e.g. communication skills, collaborative skills, critical thinking skills) and attitudes.