September 1992
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72 Reads
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690 Citations
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... Therefore, it is recommended to work with a higher number of users, so that results are more reliable. Statistical tests can be performed to estimate the significance of the differences between-users (Pedhazur and Schmelkin 2013). On the other hand, validity helps us measure whether the usability testing of the system measures the actual usability of the system in a real-life scenario with real users. ...
September 1992