The theory of planned behavior provides a conceptual framework for users’ behavioral intentions . According to this theory, personal attitudes toward the behavior, social norms or pressure associated with the behavior, and perceived self-efficacy or behavioral control over the behavior can affect behavioral intentions. Lin  combined belief and attitude constructs with intrinsic and extrinsic motivation constructs from the literature to study the motivational structure of knowledge sharing in organizations. Lin’s survey instrument included six constructs: (1) expected organizational rewards, (2) reciprocal benefits, (3) knowledge self-efficacy, (4) enjoyment in helping others, (5) attitudes toward knowledge sharing, and (6) knowledge-sharing intentions.