PSYC 2400 Lecture Notes - Lecture 8: Survival Analysis, Risk Assessment, Base Rate

69 views6 pages
!"#$%&##'##(')*
+,-./%0
1234.56/%78
96:;3;-<-.-5=%>23,?5%3>6:==%.-@5
",.563>.-:,=%3@:,?%:AA5,B56%>2363>.56-=.->=%3,B%=-.C3.-:,
!-=D%-=%E-5F5B%3=%3%63,?5%G#.53B@3,H%I888J
K
L23.%-=%!-=D%&==5==@5,.M
(3,3?5@5,.
!-=D%3==5==@5,.%23=%I%>:@4:,5,.=
K
1:@4:,5,.=%:A%!-=D%&==5==@5,.
1-E-<%>:@@-.@5,.
12-<B%46:.5>.-:,
"@@-?63.-:,
#>2::<%3,B%<3;:C6%65<3.-:,=
(5,.3<%253<.2%46:A5==-:,3<=
1-E-<%=5..-,?=
K
965.6-3<
#5,.5,>-,?
!5<53=5
16-@-,3<%=5..-,?=
K
#5..-,?=%A:6%!-=D%&==5==@5,.
*6C5%9:=-.-E5
*6C5%)5?3.-E5
N3<=5%9:=-.-E5
N3<=5%)5?3.-E5
'3>2%.O45%23=%B-AA565,.%>:,=5PC5,>5=
K
*O45=%:A%965B->.-:,%QC.>:@5=
965B->.-:,%-=%B-AA->C<.%F25,%;3=5%63.5=%365%.::%2-?2R<:F
N3<=5%4:=-.-E5=%.5,B%.:%:>>C6%F-.2%<:F%;3=5%63.5=
Actual
Violent Not Violent
Predicted Violent True Positive False Positive
Not Violent False Negative True Negative
S3=5%63.5%65465=5,.=%.25%T%:A%45:4<5%-,%3%?-E5,%4:4C<3.-:,%F2:%>:@@-.%3%
>6-@-,3<%3>.
K
*25%S3=5%!3.5%96:;<5@
N3<=5%9:=-.-E-.O%!3.5
!"#$%& ' ( !"
)
***' +,
-,,,
*****' ( .,+(/0(+(1
S3U=.6:@%EV%W563<B%G70XXJ
Y-U:,%EV%&..:6,5O%Z5,563<% :A%.25%1:@@:,F53<.2%:A%95,,=O<E3,-3
S3=5%63.5%A:6%E-:<5,>5%F3=%<:F%3,B%A3<=5%4:=-.-E5%63.5%F3=%2-?2
70X8[=K
W-=.:6O%:A%\-:<5,>5%965B->.-:,
"B53<%5E3<C3.-:,%E=V%653<-.O
&==C@4.-:,=%:A%6-=D%3==5==@5,.%3,B%@53=C65@5,.K
]-@-.5B%,C@;56%:A%6-=D%A3>.:6=
W:F%>6-.56-:,%E36-3;<5%-=%@53=C65B
W:F%>6-.56-:,%E36-3;<5%-=%B5A-,5B
^%F53D,5==5=%-,%65=536>2%G(:,323,%_%#.53B@3,H%700`JK
(5.2:B:<:?->3<%"==C5=
#C6E-E3<%&,3<O=-=
!5>5-E56%Q4563.:6%12363>.56-=.->=%G!Q1J
*F:%>:@@:,%=.3.-=.->3<%.5>2,-PC5=K
(53=C6-,?%965B->.-E5%&>>C63>O
S3>D?6:C,B/%'4-B5@-:<:?OK
&$&%5E5,.%2-=.:6O%3,3<O=-=K
#-,?<5%.:%@366-5B
§
'@4<:O5B%.:%C,5@4<:O5B
§
QC.%:A%a3-<%.:%-,%a3-<
§
*63,=-.-:,%A6:@%:,5%=.3.5%.:%3,:.256
'==5,.-3<%-B53/K
#C6E-E3<%&,3<O=-=
N3>.:6=%<53B-,?%.:%.25%.63,=-.-:,K
*-@5%:A%.63,=-.-:,K
*-@5%.:%65b:AA5,=5
965B->.:6=
\36-3;<5=/K
Q.256%PC5=.-:,=
#C6E-E:6%NC,>.-:,K
W3c36B%NC,>.-:,K
"@4:6.3,.%NC,>.-:,=
&<36@%=:C,B=H%456=:,%-=%,:.%>366O-,?%@5.3<
N3<=5%9:=-.-E5/K
&<36@%B:5=,[.%=:C,BH%;C.%456=:,%-=%>366O-,?%@5.3<
N3<=5%)5?3.-E5/K
!5E-5F/%*F:%.O45=%:A%566:6=
*25%-<<C=:6O%>:665<3.-:,
"?,:63,>5%:A%;3=5%63.5=
!5<-3,>5%:,%=3<-5,.%:6%C,-PC5%>C5=
QE56>:,A-B5,>5
Z5,B56%;-3=
W5C6-=.->=K
dCB?5@5,.%'66:6=%3,B%S-3=5=
#.3.->
YO,3@->
*O45=/K
!-=D%N3>.:6=
#C;a5>.-E5
):%=45>-A->%6-=D%A3>.:6=
+,><536%B5>-=-:,%6C<5=
+,=.6C>.C65B%1<-,->3<%dCB?5@5,.K
Q;a5>.-E5H%5@4-6->3<<O%B56-E5B%6-=D%A3>.:6=
#45>-A->%6-=D%A3>.:6=
1<536%B5>-=-:,%6C<5=
&>.C36-3<%965B->.-:,K
'@4-6->3<<O%B6-E5,%6-=D%A3>.:6=
#45>-A->%6-=D%A3>.:6=
1<536%3,B%C,><536%B5>-=-:,%6C<5=
#.6C>.C65B%96:A5==-:,3<%dCB?5@5,.K
"B5,.-A->3.-:,%:A%A3>.:6=%65<3.-,?%.:%F2O%.25%-,B-E-BC3<%:AA5,B5B
]3>D=%5@4-6->3<% 65=536>2
&,3@,5=.->%965B->.-:,K
&446:3>25=%.:%&==5==-,?%!-=D
Y-=4:=-.-:,3<K
W-=.:6->3<K
1<-,->3<K
1:,.5U.C3<K
13.5?:6-5=%:A%!-=D%N3>.:6=
Y5@:?6342->=K
956=:,3<-.O%>2363>.56-=.->=K
Y-=4:=-.-:,3<%!-=D%N3>.:6=
93=.%3,.-=:>-3<%;523E-:C6K
&?5%:A%:,=5.K
12-<B2::B%2-=.:6O%:A%@3<.653.@5,.K
93=.%=C456E-=-:,%A3-<C65H%5=>345H%-,=.-.C.-:,3<%@3<3BaC=.@5,.K
W-=.:6->3<%!-=D%N3>.:6=
#C;=.3,>5%C=5K
956=:,3<-.O%B-=:6B56
e*2653.R>:,.6:<%:E566-B5e%4=O>2:.->%=O@4.:@=
(5,.3<%B-=:6B56K
1<-,->3<%!-=D%N3>.:6=
]3>D%:A%=:>-3<%=C44:6.K
&>>5==%.:%F534:,=K
&>>5==%.:%E->.-@=K
9556=K
1:,.5U.C3<%!-=D%N3>.:6=
&>.C36-3<K
#.6C>.C65B%96:A5==-:,3<%dCB?5@5,.%G#9dJK
!-=D%&==5==@5,.%",=.6C@5,.=
Z5,563<%#.3.-=.->3<%",A:6@3.-:,%:,%!5>-B-E-=@%GZ#"!f%)CAA-5<BH%70gIJK
\-:<5,>5%!-=D%&4463-=3<%ZC-B5%G\!&Zf%W366-=%!->5H%_%hC-,=5EH%700^JK
&>.C36-3<
!:C.-,5<O%C=5B%-,%13,3B3K
#.3.->%6-=D%A3>.:6=K
i%6-=D%>3.5?:6-5=K
Z#"!
Y5E5<:45B%-,%Q,.36-:K
7I%-.5@=K
0%;-,=%:A%6-=DK
\!&Z
W-?2<-?2.=%3653=%.:%;5%.36?5.5B%A:6%-,.56E5,.-:,
]5E5<%:A%#56E->5%",E5,.:6Ob!5E-=5B%G]#"b!f%&,B65F=%_%S:,.3H%700iJK
",><CB5=%2-=.:6->3<%3,B%><-,->3<%A3>.:6=
!-=D%(3,3?5@5,.%A3>.:6=
W1!bI8%GL5;=.56%5.%3<VH%700jJK
#9d%(53=C65=
#4:C=3<%&==3C<.%!-=D%&==5==@5,.%G#&!&f%$6:44%5.%3<VH%7000J
Q,.36-:%Y:@5=.->%&==3C<.%!-=D%&==5==@5,.%GQY&!&f%W-<.:,%5.%3<VH%I88`J
#4:C=3<%&==3C<.K
!34-B%!-=D%&==5==@5,.%A:6%#5U%QAA5,>5%!5>-B-E-=@%G!!&#Q!f%W3,=:,H%
700jJ
#.3.->b00%GW3,=:,%_%*2:6,.:,H%700jJ
#Q!&Z%G\!&Z%3B34.5B%.:%=5UC3<%:AA5,B-,?J
#5UC3<%\-:<5,>5K
965B->.-,?%#45>-A->%*O45=%:A%\-:<5,>5
(:65%3..5,.-:,%:,%eF2OMe
L2565%-=%.25%.25:6OMK
(-.-?3.-,?%A3>.:6=%G5UV%96:=:>-3<%-,E:<E5@5,.H%=:>-3<%=C44:6.H%=.6:,?%
3..3>2@5,.J
96:.5>.-E5%A3>.:6=MK
&65%463>.-.-:,56=%C=-,?%.25%-,=.6C@5,.=M
+=5%:A%=>-5,.-A->%65=536>2K
1C665,.%"==C5=
]-..<5%65=536>2%:,%F2O%:AA5,B56=%=.:4%>:@@-..-,?%>6-@5=K
&?5
'@4<:O@5,.
(36-.3<%65<3.-:,=2-4=
N3>.:6=%65<3.-,?%.:%B5=-=.3,>5K
Y5=-=.3,>5%A6:@%16-@5
1:4-,?b!5<34=5%(:B5<%:A%16-@-,3<%!5>-B-E-=@
FEB.%29
(:,B3OH%N5;6C36O%I0H%I87X
77/i7%&(
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in
!"#$%&##'##(')*
+,-./%0
1234.56/%78
96:;3;-<-.-5=%>23,?5%3>6:==%.-@5
",.563>.-:,=%3@:,?%:AA5,B56%>2363>.56-=.->=%3,B%=-.C3.-:,
!-=D%-=%E-5F5B%3=%3%63,?5%G#.53B@3,H%I888JK
L23.%-=%!-=D%&==5==@5,.M
965B->.-:,
(3,3?5@5,.
!-=D%3==5==@5,.%23=%I%>:@4:,5,.=K
1:@4:,5,.=%:A%!-=D%&==5==@5,.
1-E-<%>:@@-.@5,.
12-<B%46:.5>.-:,
"@@-?63.-:,
#>2::<%3,B%<3;:C6%65<3.-:,=
(5,.3<%253<.2%46:A5==-:,3<=
1-E-<%=5..-,?=K
965.6-3<
#5,.5,>-,?
!5<53=5
16-@-,3<%=5..-,?=K
#5..-,?=%A:6%!-=D%&==5==@5,.
*6C5%9:=-.-E5
*6C5%)5?3.-E5
N3<=5%9:=-.-E5
N3<=5%)5?3.-E5
'3>2%.O45%23=%B-AA565,.%>:,=5PC5,>5=K
*O45=%:A%965B->.-:,%QC.>:@5=
965B->.-:,%-=%B-AA->C<.%F25,%;3=5%63.5=%365%.::%2-?2R<:F
N3<=5%4:=-.-E5=%.5,B%.:%:>>C6%F-.2%<:F%;3=5%63.5=
Actual
Violent
Not Violent
Predicted
Violent
True Positive
False Positive
Not Violent
False Negative
True Negative
S3=5%63.5%65465=5,.=%.25%T%:A%45:4<5%-,%3%?-E5,%4:4C<3.-:,%F2:%>:@@-.%3%
>6-@-,3<%3>.
K
*25%S3=5%!3.5%96:;<5@
N3<=5%9:=-.-E-.O%!3.5
!"#$%& ' ( !"
)
*
*
*
'+,
-,,,
*
*
*
*
*
' ( .,+(/0(+(1
S3U=.6:@%EV%W563<B%G70XXJ
Y-U:,%EV%&..:6,5O%Z5,563<% :A%.25%1:@@:,F53<.2%:A%95,,=O<E3,-3
S3=5%63.5%A:6%E-:<5,>5%F3=%<:F%3,B%A3<=5%4:=-.-E5%63.5%F3=%2-?2
70X8[=
K
W-=.:6O%:A%\-:<5,>5%965B->.-:,
"B53<%5E3<C3.-:,%E=V%653<-.O
&==C@4.-:,=%:A%6-=D%3==5==@5,.%3,B%@53=C65@5,.
K
]-@-.5B%,C@;56%:A%6-=D%A3>.:6=
W:F%>6-.56-:,%E36-3;<5%-=%@53=C65B
W:F%>6-.56-:,%E36-3;<5%-=%B5A-,5B
^%F53D,5==5=%-,%65=536>2%G(:,323,%_%#.53B@3,H%700`J
K
(5.2:B:<:?->3<%"==C5=
#C6E-E3<%&,3<O=-=
!5>5-E56%Q4563.:6%12363>.56-=.->=%G!Q1J
*F:%>:@@:,%=.3.-=.->3<%.5>2,-PC5=
K
(53=C6-,?%965B->.-E5%&>>C63>O
S3>D?6:C,B/%'4-B5@-:<:?O
K
&$&%5E5,.%2-=.:6O%3,3<O=-=
K
#-,?<5%.:%@366-5B
§
'@4<:O5B%.:%C,5@4<:O5B
§
QC.%:A%a3-<%.:%-,%a3-<
§
*63,=-.-:,%A6:@%:,5%=.3.5%.:%3,:.256
'==5,.-3<%-B53/K
#C6E-E3<%&,3<O=-=
N3>.:6=%<53B-,?%.:%.25%.63,=-.-:,K
*-@5%:A%.63,=-.-:,K
*-@5%.:%65b:AA5,=5
965B->.:6=
\36-3;<5=/K
Q.256%PC5=.-:,=
#C6E-E:6%NC,>.-:,K
W3c36B%NC,>.-:,K
"@4:6.3,.%NC,>.-:,=
&<36@%=:C,B=H%456=:,%-=%,:.%>366O-,?%@5.3<
N3<=5%9:=-.-E5/K
&<36@%B:5=,[.%=:C,BH%;C.%456=:,%-=%>366O-,?%@5.3<
N3<=5%)5?3.-E5/K
!5E-5F/%*F:%.O45=%:A%566:6=
*25%-<<C=:6O%>:665<3.-:,
"?,:63,>5%:A%;3=5%63.5=
!5<-3,>5%:,%=3<-5,.%:6%C,-PC5%>C5=
QE56>:,A-B5,>5
Z5,B56%;-3=
W5C6-=.->=K
dCB?5@5,.%'66:6=%3,B%S-3=5=
#.3.->
YO,3@->
*O45=/K
!-=D%N3>.:6=
#C;a5>.-E5
):%=45>-A->%6-=D%A3>.:6=
+,><536%B5>-=-:,%6C<5=
+,=.6C>.C65B%1<-,->3<%dCB?5@5,.K
Q;a5>.-E5H%5@4-6->3<<O%B56-E5B%6-=D%A3>.:6=
#45>-A->%6-=D%A3>.:6=
1<536%B5>-=-:,%6C<5=
&>.C36-3<%965B->.-:,K
'@4-6->3<<O%B6-E5,%6-=D%A3>.:6=
#45>-A->%6-=D%A3>.:6=
1<536%3,B%C,><536%B5>-=-:,%6C<5=
#.6C>.C65B%96:A5==-:,3<%dCB?5@5,.K
"B5,.-A->3.-:,%:A%A3>.:6=%65<3.-,?%.:%F2O%.25%-,B-E-BC3<%:AA5,B5B
]3>D=%5@4-6->3<% 65=536>2
&,3@,5=.->%965B->.-:,K
&446:3>25=%.:%&==5==-,?%!-=D
Y-=4:=-.-:,3<K
W-=.:6->3<K
1<-,->3<K
1:,.5U.C3<K
13.5?:6-5=%:A%!-=D%N3>.:6=
Y5@:?6342->=K
956=:,3<-.O%>2363>.56-=.->=K
Y-=4:=-.-:,3<%!-=D%N3>.:6=
93=.%3,.-=:>-3<%;523E-:C6K
&?5%:A%:,=5.K
12-<B2::B%2-=.:6O%:A%@3<.653.@5,.K
93=.%=C456E-=-:,%A3-<C65H%5=>345H%-,=.-.C.-:,3<%@3<3BaC=.@5,.K
W-=.:6->3<%!-=D%N3>.:6=
#C;=.3,>5%C=5K
956=:,3<-.O%B-=:6B56
e*2653.R>:,.6:<%:E566-B5e%4=O>2:.->%=O@4.:@=
(5,.3<%B-=:6B56K
1<-,->3<%!-=D%N3>.:6=
]3>D%:A%=:>-3<%=C44:6.K
&>>5==%.:%F534:,=K
&>>5==%.:%E->.-@=K
9556=K
1:,.5U.C3<%!-=D%N3>.:6=
&>.C36-3<K
#.6C>.C65B%96:A5==-:,3<%dCB?5@5,.%G#9dJK
!-=D%&==5==@5,.%",=.6C@5,.=
Z5,563<%#.3.-=.->3<%",A:6@3.-:,%:,%!5>-B-E-=@%GZ#"!f%)CAA-5<BH%70gIJK
\-:<5,>5%!-=D%&4463-=3<%ZC-B5%G\!&Zf%W366-=%!->5H%_%hC-,=5EH%700^JK
&>.C36-3<
!:C.-,5<O%C=5B%-,%13,3B3K
#.3.->%6-=D%A3>.:6=K
i%6-=D%>3.5?:6-5=K
Z#"!
Y5E5<:45B%-,%Q,.36-:K
7I%-.5@=K
0%;-,=%:A%6-=DK
\!&Z
W-?2<-?2.=%3653=%.:%;5%.36?5.5B%A:6%-,.56E5,.-:,
]5E5<%:A%#56E->5%",E5,.:6Ob!5E-=5B%G]#"b!f%&,B65F=%_%S:,.3H%700iJK
",><CB5=%2-=.:6->3<%3,B%><-,->3<%A3>.:6=
!-=D%(3,3?5@5,.%A3>.:6=
W1!bI8%GL5;=.56%5.%3<VH%700jJK
#9d%(53=C65=
#4:C=3<%&==3C<.%!-=D%&==5==@5,.%G#&!&f%$6:44%5.%3<VH%7000J
Q,.36-:%Y:@5=.->%&==3C<.%!-=D%&==5==@5,.%GQY&!&f%W-<.:,%5.%3<VH%I88`J
#4:C=3<%&==3C<.K
!34-B%!-=D%&==5==@5,.%A:6%#5U%QAA5,>5%!5>-B-E-=@%G!!&#Q!f%W3,=:,H%
700jJ
#.3.->b00%GW3,=:,%_%*2:6,.:,H%700jJ
#Q!&Z%G\!&Z%3B34.5B%.:%=5UC3<%:AA5,B-,?J
#5UC3<%\-:<5,>5K
965B->.-,?%#45>-A->%*O45=%:A%\-:<5,>5
(:65%3..5,.-:,%:,%eF2OMe
L2565%-=%.25%.25:6OMK
(-.-?3.-,?%A3>.:6=%G5UV%96:=:>-3<%-,E:<E5@5,.H%=:>-3<%=C44:6.H%=.6:,?%
3..3>2@5,.J
96:.5>.-E5%A3>.:6=MK
&65%463>.-.-:,56=%C=-,?%.25%-,=.6C@5,.=M
+=5%:A%=>-5,.-A->%65=536>2K
1C665,.%"==C5=
]-..<5%65=536>2%:,%F2O%:AA5,B56=%=.:4%>:@@-..-,?%>6-@5=K
&?5
'@4<:O@5,.
(36-.3<%65<3.-:,=2-4=
N3>.:6=%65<3.-,?%.:%B5=-=.3,>5K
Y5=-=.3,>5%A6:@%16-@5
1:4-,?b!5<34=5%(:B5<%:A%16-@-,3<%!5>-B-E-=@
FEB.%29
(:,B3OH%N5;6C36O%I0H%I87X 77/i7%&(
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Risk is viewed as a range (steadman, 2000) Base rate represents the % of people in a given population who commit a criminal act. Prediction is difficult when base rates are too high/low. False positives tend to occur with low base rates. Dixon v. attorney general of the commonwealth of pennsylvania. Base rate for violence was low and false positive rate was high. 3 weaknesses in research (monahan & steadman, 1994) Alarm doesn"t sound, but person is carrying metal. Identification of factors relating to why the individual offended. General statistical information on recidivism (gsir; nuffield, 1982) Violence risk appraisal guide (vrag; harris rice, & quinsev, 1993) Level of service inventory-revised (lsi-r; andrews & bonta, 1995) Spousal assault risk assessment (sara; kropp et al. , 1999) Ontario domestic assault risk assessment (odara; hilton et al. , 2004) Rapid risk assessment for sex offence recidivism (rrasor; hanson, Little research on why offenders stop committing crimes.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents