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A study showed that during the life of a [[system]], satisfaction from users will on average increase in time as the users' experiences with the system increase.<ref name=":0">{{cite thesis |last=Mullany |first=Michael John |title=The Use of Analyst-User Cognitive Style Differentials to Predict Aspects of User Satisfaction with Information Systems |date=2006 |degree=PhD |publisher=Auckland University of Technology |url=https://hdl.handle.net/10292/338}}</ref> The study found that users' cognitive style (preferred approach to problem solving) was not an accurate predictor of the user's actual CUS. Similarly, developers of the system participated, and they too did not have a strong correlation between cognitive style and actual CUS. However, a strong correlation was observed between 85 and 652 days into using the system. This means that one's manner of thinking and how their attitude towards a particular product became increasingly correlated as time went on. Some researchers have hypothesized that familiarity with a system may cause one to mentally assimilate to accommodate that system. Mullany, Tan, and Gallupe devised a system (the System Satisfaction Schedule (SSS)), which utilizes user-generated qualities and so avoids the problem of dating qualities.<ref name=":0" /> They define CUS as the absence of user dissatisfaction and complaint, as assessed by users who have had at least some experience of using the system. Motivation, conversely, is based on beliefs about the future use of the system.<ref name=":1">{{cite journal