Sauro, Jeff <br/><br/>
Quantifying the user experience :  practical statistics for user research / 
Jeff Sauro, James R. Lewis 
 - Amsterdam, Netherlands :  Elsevier/Morgan Kaufmann,  c2012 
 - xv, 295 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780123849687 
<br/><br/><label>Subjects--Topical Terms: </label><br/>User interfaces (Computer systems)--Testing--Statistical methods