Affected variables of information needs occurrence of an information seeker which discussed in this paper are an imporfant research area of the user studies. This paper is drawn on literary reviews focusing, in particularly the information needs concepts, theories, and its affected variables which explored the cognitive metaphors and methods. Even though researchers reviewed a range of several existing published pieces of literature on the target topic, the main objective of this paper is to

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... cuss the key concepts of information needs from different angles to unify the concept of information needs through a new dimension while designing a very comprehensive hypothetical model of information needs occurrences. This paper found that information needs occurrences happen through a complex process of involving the individual's insuffcient knowledge structure. The complexi& arose due to two kind of basic variables such as cognitive and socio variables. The problem of insufficient knowledge became apparent when a variety of void areas were identfied in the current state of knowledge. These voids were identified through cognitive environment. The cognitive variables were found as a set of features which expresses the individual's knowledge identity and capacity. This paper suggests that some specific cognitive factors such as skill factors, knowledge hctors and psychological statuses of the overall intellectual power which affected with the insufficient needs. In this context, different avenues of information needs occurrences were discussed in order to identify the nature of the needs and the characteristics involved with that process.