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Journal Articles
Reference Services Review (2016) 44 (3): 362–374.
Published: 08 August 2016
... help formats. For example, Purchase and Worrill (2002) empirically tested and ranked a set of online help features (e.g. index, balloon help and graphical examples) and design principles (e.g. “the help system should be unobtrusive” and “help should be context sensitive”). They suggested that design...

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