id author title date pages extension mime words sentence flesch summary cache txt ital-5174 Perrin, Joy Marie; Clark, Melanie; De-Leon, Esther; Edgar, Lynne Usability Testing for Greater Impact: A Primo Case Study 2014-12-18 10 .pdf application/pdf 3655 142 57 that  the  time  on  tasks,  excluding  task  4,  diminished  between  task  1   and  task  7,  suggesting  that  participants  had  no  trouble  learning  and  remembering  how  to  use  the   system.   Error  Rate  for  Each  Task   The  error  rate  proved  to  be  the  most  accurate  indicator  of  usability  problems  with  each  task.  Each   time  a  participant  chose  a  wrong  path,  faced  an  impasse,  or  had  to  be  guided  by  the  facilitator,  the   event  was  labeled  as  an  error.   Because  the  error  rate  seems  to  decline  from  task  1  to  task  7  (excluding  tasks  3   and  4),  the  team  inferred  that  users  were  able  to  learn  how  to  use  the  system  quite  easily.   cache/ital-5174.pdf txt/ital-5174.txt