@article {17333,
	title = {Providing Advisory Notices for UNIX Command Users: Design, Implementation, and Empirical Evaluations},
	journal = {Technical Reports of the Computer Science Department},
	year = {1998},
	month = {1998/10/15/},
	abstract = {UNIX Notices (UN) was developed to study the problems in providing advice tousers of complex systems.  The issues studied were: what, when, and how 
to present the advice.  
The first experiment with 24 subjects examined how different presentation 
styles affect the 
effectiveness of UNs advice. The three presentation styles studied were: 
notice appears in separate window; notice appears only on request; 
notice appears in users window immediately.  The results 
showed that the third style was significantly more effective than the first style.  Furthermore, the 
results indicated that the most effective presentation method is also the most disruptive.
The second experiment with 29 subjects studied how delay in the advice feedback affects the 
performance of UN.  The treatments were: immediate feedback, feedback at end of session, and no 
feedback.  Over a period of 6 weeks, the commands entered by the subjects were logged and 
studied.  The results showed that immediate feedback caused subjects to repeat significantly fewer 
inefficient command sequences.  However, immediate feedback and feedback at end of session 
may have given subjects a negative feeling towards UNIX.
(Also cross-referenced as CAR-TR-651)
},
	keywords = {Technical Report},
	url = {http://drum.lib.umd.edu/handle/1903/387},
	author = {Kuah,Boon-Teck and Shneiderman, Ben}
}
