Since then, studies have gone on to focus on the provision of social support rather than on the elaboration of the structural aspects of social networks. Not all social ties or networks are supportive and there is variation in the type, frequency and extent of support provided. Social support, in theory, can be divided into emotional support (usually provided by a confidant or intimate other), instrumental support (or help in kind, money or labour), appraisal support (help in decision making) and informational support (provision of advice or information).