! " " " # $ ! $ ! ! !$ %& ! ! ! ' & " $ ! $ #! $ '! ! & & " & & $ !! $ & ! $ & ! ! ! $ & " & ! $ $ $ $ !" # $ %& ' ( ) * ' ( ( ( ( + !#$ ( ( ( * ( ( * ( , ' - ( # ' ( ( . !/ ! 0# 1 - - - 0 - - 2 34 5 ( 245 ' ( 6 ( ' ( ( ( ( ( # 7 - - ( ( 8 ' ( ( #1 ' - - - - - 245 # $ !$ ! $ & & ! ! $ !$ ( " )! ( !$**+ #$ !$ $ , ( " ! 2 S. Gabrielli, and A. Jameson 1 ' - 0 - * 6 - ( ' ( ( # - 0 9' - - : - ( ( ' - 245 ( * - - # ; 0 ( '- * ( - ' 6 * #< - - 0 ( * - 3 '- ( 6 = 0 # 1 - 0 $ ! - ( ( * 6 > #? '- - * - - * 3 > 3 - 9@@A ( 6 %B + ?( != - 3 ( 6 ( - - # * ' 3 ( 6 - ( 6 %B + 9@@A# < ( ' ( ( - - 0 #$ ( - - # Differences and Changes in Preferences Regarding Personalized Systems 3 7 - ( 6 ( 3 # 0 %CCC+ ( ' % + %CCC+' # 4 S. Gabrielli, and A. Jameson 0 (' * 6 6 # 6 ( 0 - # ? * ' 3 ( * - 0 - ' > - - , 0 ( ( * = - ( * ( - 0 - = - ( ( 6 # < ' 3 - * - ( '- - ' - ( ( 6 # ; ( '- ( > - - 0 3 0 ( ( ( 0D ( - ' ( ' 3 # 7 6 0' - ( ( ( #? * ' 3 '- ( ' - 0 - ( , ( - # < - ( - ( ( 3 ( 0 # E ( ' ( * > $ 3 - ' - = ( 3 - # ! ! ' ( ( ( ' # < 3 ( D ) D # ( ' 0 - 0 (- - 3 '- #? * '2 - 3 2 < 2 6 - 6 2 <6 <6 # Differences and Changes in Preferences Regarding Personalized Systems 5 0 ' * - ' ( ( ( #< ( >; 3 ' ( ' 3 =- 3 ' ( 6 # $ ( ( ( 0 # * ' (( ( ' - ! # " # $ % & ! ' ; - - - 0 ( ( ' - ( ' - ' 245 " !: 0 ( #; - - 0- ( ( - - ( # " ( ) 1 3 3 ( 0 ( ' - ( - ( # ' ( 0 ( 6 ' ' - - ( # 1 - ( - ( - !. ' - ' ( ' - - ( # ( - - * - ( 0 ' ( ( !@ ' - , ( ( 0 # 6 S. Gabrielli, and A. Jameson - ( ( #(#' - * - ( ( - F# G ( ( - ' - ( # * ' ( ' * ( ( ( - # H* ( - !9 - ( ( ( ' * (' 3 * ( ' #G ( #(#' ( 5 ' 3 ( #(#' - ( #(#' - ( # $ - - 3 ' I ' * 3 ' ( #(#' B 0 0 - ( * #(#' !! 3 ( ( ( *3 - ' - * ( # ' / - ( - ; 3 ( 6 (#G - - ' - ' ( * #(#' - #H 6 - ( ( # " * $ - 0 0 ( - ( ( ( (' - - * - # ( ( 0 ( - 0 - - ' -( #$ - ( * ' - ( - * - ' 6 A# ( - - 0 0 Differences and Changes in Preferences Regarding Personalized Systems 7 ' #5 ( 0 * ( * * ' 0 = 0 ( ( ( ' ' 3 * # ! - 0 ( ' ( 0 * # 4 * ( 9 - - ( - ' ( ( # ( 0 0 A# ' 0 ( ( ( * ' ( * # - - ( - ( # 7 0' , ( 6 # ' ( ( 0 * ( ( ' * ( 0 ( ( 0 ' ( * # 5 ( ( ' ( - #$ ' ' 0( 0 #(#' * - # ( ( ' ( #(#' 6 J - - * - # ( ( ' ( ( ( ( 8 S. Gabrielli, and A. Jameson 0 ( * ( ' #(#' * - #$ - , ( ' 0 - ( (- :# "" ' ! $ ( * * ( # $ ( #(#' - 3 3 ( . 9@ !A 0 ( ' ( 0 ( - ( * # 5 ( - ( * - (- #(#' (#$ 0 - ( ( 6 - ( ( ' ( ( # ! ! ? ( '- 3 3 0 ( ( - ( ( ( 6 0 ' 0 ( ( # (( - - ( , - ( - ' - - # $ - - ( ( 0 ( - '- ( - # 7 - * 3 #7 0 - ( ' - ( ( 0 - ( * 6 #(#' ( 3 E H !J # - ( * - (4 ( E ; 0 ( ' ( ( #$ * #(#' (- Differences and Changes in Preferences Regarding Personalized Systems 9 ( ( * ( 0 - ( # K 0 ( - L ! " " 6' L ! 6# ( ( * ( * 3 ' ( 0 0 ( * # "+ % ' ' # ! " ; ' ( 3 ' ( ( #(#' ( ' * - ( ( #; * - 0 - ( - ( ( * ( # , - 0 - ( ( 6 - ( ( ' * ( ( ( #$ ( - 0 ( ' - ( ' #< ( 3 ( - 245 ' ( ( ( # + , ( ; - '- 0 - ', ( ( # $ - 0 245 0 ( - ' - ( ( 3 ( # ( -. ! (. /* - * ) 012+ ( & ( 3 4.,5 %12 6 ! (5 ! 7 ' 5 & ! $ 3 $ 10 S. Gabrielli, and A. Jameson 8 7 7 ) 002+ * 96 ! ! : $!$ 6 7 $ - !$ ) 001+ ;< $ $ " =$ 9 5 5 ! ; > 8 : && ? ' 2@ A 5 " 6 7 6 $ 5$ * 4" $ !$ B < B )8@@C+ 5 ! 6 4" # $ D E !$ ! " ! #$$% > 88 3 '8 && @:' 1 ? - F , )8@@2+ - ,&& & & " ! #$$%' ((!' > 8 56 5 C G " - ( ! 4 ) 000+ - 95 & ! ) 8 ' 80 2 G 5 )8@@C+ 6 $ ,( $ / B* $ ) + $ $ & D '5 - 4" , & " 6 ! # $ ,7H@C )- + 8@@C 1 7 )8@@@+ 6 & D ! ! * " 8 A A@0'A8C 0 B , )8@@1+ 6 , B ! B, 9 $ 7 '5 & ! 7 9 4" " !$ 4 ,&& ! 8 4 * $# $ 3B !@# M ' 4#' < ' 4#' M ' #' N ( ' #' ' # 9@@: $ % & #1 N (' M# H # ' '() * ' /9' 9' # J.J3"@!# $ , 5 )8@@2+ - - $ 6 I9 = " > 6 ( " ! ( ! ++ !,! - +. ! " ! /!0- 1 -2 6 & 8@@2 8 < . / 5 $ * ) 01:+ - 3 # - ! * $ 6 ! $ " 6! ! ? A '?C : * * )8@@ + * $ && $ '! ! " ' 33 ?12' C:A A * $ B )8@@8+ - 3 > ( )4 + , & " " G && $ :80':A2 ? * $ B )8@@C+ - *4 6 $ ,( $ /B* $ ) + $ $ & D '5 - 4" , & " 6 ! # $ ,7H@C )- + C 3 B ) 00:+ D 4 *, ,! !( 2 > > <6 > G * / . )8@@C+ 5 6 ( & & $ $# $ & D '5 - 4" , & " 6 B 8@ $ - 1 > > <6 > G * / . )8@@2+ - 6 4 *'7 8 ( & & $ 444 ( 5 ! 5 ! 6 D6, 0 $ 6 )8@@?+ 6 6 5$ / G * )4 + , & , & " 7 & 6 )&& 81?'800+ 7 $ (,9 .* ( 8@ B . - ) 011+ . & & & ! * 7 )4 + " 6 8 " ! 3 # J 3 $'7 && 1?0'12?